diff --git a/psalm.xml b/psalm.xml
index 5001d0a7..fc577119 100644
--- a/psalm.xml
+++ b/psalm.xml
@@ -15,6 +15,7 @@
     </ignoreFiles>
   </projectFiles>
   <issueHandlers>
+    <MixedAssignment errorLevel="suppress" />
     <RiskyTruthyFalsyComparison errorLevel="suppress" />
   </issueHandlers>
 </psalm>
diff --git a/src/Column.php b/src/Column.php
index 1ce3b73e..d408ec7e 100644
--- a/src/Column.php
+++ b/src/Column.php
@@ -6,6 +6,7 @@
 
 use Yiisoft\Db\Expression\Expression;
 use Yiisoft\Db\Schema\Builder\AbstractColumn;
+use Yiisoft\Db\Schema\Column\StringColumnSchema;
 
 /**
  * Provides a convenient way to create column schema for use with {@see Schema} for MSSQL Server.
@@ -21,6 +22,10 @@
  *
  * Provides a fluent interface, which means that the methods can be chained together to create a column schema with
  * many properties in a single line of code.
+ *
+ * @psalm-suppress DeprecatedClass
+ *
+ * @deprecated Use {@see StringColumnSchema} or other column classes instead. Will be removed in 2.0.0.
  */
 final class Column extends AbstractColumn
 {
diff --git a/src/Column/ColumnDefinitionBuilder.php b/src/Column/ColumnDefinitionBuilder.php
index 82698f69..737bc161 100644
--- a/src/Column/ColumnDefinitionBuilder.php
+++ b/src/Column/ColumnDefinitionBuilder.php
@@ -49,6 +49,13 @@ public function build(ColumnSchemaInterface $column): string
             . $this->buildExtra($column);
     }
 
+    public function buildAlter(ColumnSchemaInterface $column): string
+    {
+        return $this->buildType($column)
+            . $this->buildNotNull($column)
+            . $this->buildExtra($column);
+    }
+
     protected function getDbType(ColumnSchemaInterface $column): string
     {
         $size = $column->getSize();
diff --git a/src/DDLQueryBuilder.php b/src/DDLQueryBuilder.php
index a9f2685f..87b9ee3a 100644
--- a/src/DDLQueryBuilder.php
+++ b/src/DDLQueryBuilder.php
@@ -8,11 +8,13 @@
 use Throwable;
 use Yiisoft\Db\Exception\InvalidArgumentException;
 use Yiisoft\Db\Exception\NotSupportedException;
-use Yiisoft\Db\Expression\Expression;
 use Yiisoft\Db\QueryBuilder\AbstractDDLQueryBuilder;
 use Yiisoft\Db\Schema\Builder\ColumnInterface;
+use Yiisoft\Db\Schema\Column\ColumnSchemaInterface;
 
 use function array_diff;
+use function implode;
+use function preg_replace;
 
 /**
  * Implements a (Data Definition Language) SQL statements for MSSQL Server.
@@ -51,45 +53,45 @@ public function addDefaultValue(string $table, string $name, string $column, mix
     /**
      * @throws Exception
      */
-    public function alterColumn(string $table, string $column, ColumnInterface|string $type): string
+    public function alterColumn(string $table, string $column, ColumnInterface|ColumnSchemaInterface|string $type): string
     {
-        $sqlAfter = [];
         $columnName = $this->quoter->quoteColumnName($column);
         $tableName = $this->quoter->quoteTableName($table);
-        $constraintBase = preg_replace('/[^a-z0-9_]/i', '', $table . '_' . $column);
+        $constraintBase = preg_replace('/\W/', '', $table . '_' . $column);
 
         if ($type instanceof ColumnInterface) {
-            $type->setFormat('{type}{length}{notnull}{append}');
-
-            /** @psalm-var mixed $defaultValue */
-            $defaultValue = $type->getDefault();
-            if ($defaultValue !== null || $type->isNotNull() === false) {
-                $sqlAfter[] = $this->addDefaultValue(
-                    $table,
-                    "DF_{$constraintBase}",
-                    $column,
-                    $defaultValue instanceof Expression ? $defaultValue : new Expression((string)$defaultValue)
-                );
-            }
-
-            $checkValue = $type->getCheck();
-            if ($checkValue !== null) {
-                $sqlAfter[] = "ALTER TABLE {$tableName} ADD CONSTRAINT " .
-                    $this->quoter->quoteColumnName("CK_{$constraintBase}") .
-                    ' CHECK (' . ($defaultValue instanceof Expression ? $checkValue : new Expression($checkValue)) . ')';
-            }
-
-            if ($type->isUnique()) {
-                $sqlAfter[] = "ALTER TABLE {$tableName} ADD CONSTRAINT " . $this->quoter->quoteColumnName("UQ_{$constraintBase}") . " UNIQUE ({$columnName})";
-            }
+            $type = $type->asString();
         }
 
-        /** @psalm-suppress DeprecatedMethod */
-        return implode("\n", [
+        if (is_string($type)) {
+            $type = $this->schema->getColumnFactory()->fromDefinition($type);
+        }
+
+        $columnDefinitionBuilder = $this->queryBuilder->getColumnDefinitionBuilder();
+        $statements = [
             $this->dropConstraintsForColumn($table, $column, 'D'),
-            "ALTER TABLE $tableName ALTER COLUMN $columnName {$this->queryBuilder->getColumnType($type)}",
-            ...$sqlAfter,
-        ]);
+            "ALTER TABLE $tableName ALTER COLUMN $columnName " . $columnDefinitionBuilder->buildAlter($type),
+        ];
+
+        if ($type->hasDefaultValue()) {
+            $defaultValue = $type->dbTypecast($type->getDefaultValue());
+            $statements[] = $this->addDefaultValue($table, "DF_$constraintBase", $column, $defaultValue);
+        }
+
+        $checkValue = $type->getCheck();
+        if (!empty($checkValue)) {
+            $statements[] = "ALTER TABLE $tableName ADD CONSTRAINT "
+                . $this->quoter->quoteColumnName("CK_$constraintBase")
+                . " CHECK ($checkValue)";
+        }
+
+        if ($type->isUnique()) {
+            $statements[] = "ALTER TABLE $tableName ADD CONSTRAINT "
+                . $this->quoter->quoteColumnName("UQ_$constraintBase")
+                . " UNIQUE ($columnName)";
+        }
+
+        return implode("\n", $statements);
     }
 
     /**
diff --git a/src/Schema.php b/src/Schema.php
index 06bc0686..53e1e77a 100644
--- a/src/Schema.php
+++ b/src/Schema.php
@@ -71,6 +71,7 @@ final class Schema extends AbstractPdoSchema
     /** @deprecated Use {@see ColumnBuilder} instead. Will be removed in 2.0. */
     public function createColumn(string $type, array|int|string|null $length = null): ColumnInterface
     {
+        /** @psalm-suppress DeprecatedClass */
         return new Column($type, $length);
     }
 
@@ -229,7 +230,6 @@ protected function loadTableSchema(string $name): TableSchemaInterface|null
      */
     protected function loadTablePrimaryKey(string $tableName): Constraint|null
     {
-        /** @psalm-var mixed $tablePrimaryKey */
         $tablePrimaryKey = $this->loadTableConstraints($tableName, self::PRIMARY_KEY);
         return $tablePrimaryKey instanceof Constraint ? $tablePrimaryKey : null;
     }
@@ -247,7 +247,6 @@ protected function loadTablePrimaryKey(string $tableName): Constraint|null
      */
     protected function loadTableForeignKeys(string $tableName): array
     {
-        /** @psalm-var mixed $tableForeignKeys */
         $tableForeignKeys = $this->loadTableConstraints($tableName, self::FOREIGN_KEYS);
         return is_array($tableForeignKeys) ? $tableForeignKeys : [];
     }
@@ -320,7 +319,6 @@ protected function loadTableIndexes(string $tableName): array
      */
     protected function loadTableUniques(string $tableName): array
     {
-        /** @psalm-var mixed $tableUniques */
         $tableUniques = $this->loadTableConstraints($tableName, self::UNIQUES);
         return is_array($tableUniques) ? $tableUniques : [];
     }
@@ -338,7 +336,6 @@ protected function loadTableUniques(string $tableName): array
      */
     protected function loadTableChecks(string $tableName): array
     {
-        /** @psalm-var mixed $tableCheck */
         $tableCheck = $this->loadTableConstraints($tableName, self::CHECKS);
         return is_array($tableCheck) ? $tableCheck : [];
     }
@@ -356,7 +353,6 @@ protected function loadTableChecks(string $tableName): array
      */
     protected function loadTableDefaultValues(string $tableName): array
     {
-        /** @psalm-var mixed $tableDefault */
         $tableDefault = $this->loadTableConstraints($tableName, self::DEFAULTS);
         return is_array($tableDefault) ? $tableDefault : [];
     }
diff --git a/tests/ColumnSchemaBuilderTest.php b/tests/ColumnSchemaBuilderTest.php
index fe1c5a0e..da490b0d 100644
--- a/tests/ColumnSchemaBuilderTest.php
+++ b/tests/ColumnSchemaBuilderTest.php
@@ -15,12 +15,4 @@
 final class ColumnSchemaBuilderTest extends CommonColumnSchemaBuilderTest
 {
     use TestTrait;
-
-    /**
-     * @dataProvider \Yiisoft\Db\Mssql\Tests\Provider\ColumnSchemaBuilderProvider::createColumnTypes()
-     */
-    public function testCreateColumnTypes(string $expected, string $type, ?int $length, array $calls): void
-    {
-        parent::testCreateColumnTypes($expected, $type, $length, $calls);
-    }
 }
diff --git a/tests/Provider/ColumnSchemaBuilderProvider.php b/tests/Provider/ColumnSchemaBuilderProvider.php
deleted file mode 100644
index 5f7b2d18..00000000
--- a/tests/Provider/ColumnSchemaBuilderProvider.php
+++ /dev/null
@@ -1,29 +0,0 @@
-<?php
-
-declare(strict_types=1);
-
-namespace Yiisoft\Db\Mssql\Tests\Provider;
-
-final class ColumnSchemaBuilderProvider extends \Yiisoft\Db\Tests\Provider\ColumnSchemaBuilderProvider
-{
-    protected static string $driverName = 'mssql';
-
-    public static function createColumnTypes(): array
-    {
-        $types = parent::createColumnTypes();
-        $types['integer'][0] = '[column] int';
-
-        $types['uuid'][0] = '[column] UNIQUEIDENTIFIER';
-        $types['uuid not null'][0] = '[column] UNIQUEIDENTIFIER NOT NULL';
-
-        $types['uuid with default'][0] = '[column] UNIQUEIDENTIFIER DEFAULT \'875343b3-6bd0-4bec-81bb-aa68bb52d945\'';
-        $types['uuid with default'][3] = [['defaultValue', '875343b3-6bd0-4bec-81bb-aa68bb52d945']];
-
-        $types['uuid pk'][0] = '[column] UNIQUEIDENTIFIER PRIMARY KEY';
-        $types['uuid pk not null'][0] = '[column] UNIQUEIDENTIFIER PRIMARY KEY NOT NULL';
-        $types['uuid pk not null with default'][0] = '[column] UNIQUEIDENTIFIER PRIMARY KEY NOT NULL DEFAULT NEWID()';
-        $types['uuid pk not null with default'][3] = [['notNull'], ['defaultExpression', 'NEWID()']];
-
-        return $types;
-    }
-}
diff --git a/tests/Provider/QueryBuilderProvider.php b/tests/Provider/QueryBuilderProvider.php
index 9c5aa76f..baada256 100644
--- a/tests/Provider/QueryBuilderProvider.php
+++ b/tests/Provider/QueryBuilderProvider.php
@@ -36,6 +36,200 @@ final class QueryBuilderProvider extends \Yiisoft\Db\Tests\Provider\QueryBuilder
         '\\\\' => '[\\]',
     ];
 
+    public static function alterColumn(): array
+    {
+        return [
+            [
+                'varchar(255)',
+                <<<SQL
+                DECLARE @tableName VARCHAR(MAX) = '[foo1]'
+                DECLARE @columnName VARCHAR(MAX) = 'bar'
+                WHILE 1=1 BEGIN
+                    DECLARE @constraintName NVARCHAR(128)
+                    SET @constraintName = (SELECT TOP 1 OBJECT_NAME(cons.[object_id])
+                        FROM (
+                            SELECT sc.[constid] object_id
+                            FROM [sys].[sysconstraints] sc
+                            JOIN [sys].[columns] c ON c.[object_id]=sc.[id] AND c.[column_id]=sc.[colid] AND c.[name]=@columnName
+                            WHERE sc.[id] = OBJECT_ID(@tableName)
+                            UNION
+                            SELECT object_id(i.[name]) FROM [sys].[indexes] i
+                            JOIN [sys].[columns] c ON c.[object_id]=i.[object_id] AND c.[name]=@columnName
+                            JOIN [sys].[index_columns] ic ON ic.[object_id]=i.[object_id] AND i.[index_id]=ic.[index_id] AND c.[column_id]=ic.[column_id]
+                            WHERE i.[is_unique_constraint]=1 and i.[object_id]=OBJECT_ID(@tableName)
+                        ) cons
+                        JOIN [sys].[objects] so ON so.[object_id]=cons.[object_id]
+                         WHERE so.[type]='D')
+                    IF @constraintName IS NULL BREAK
+                    EXEC (N'ALTER TABLE ' + @tableName + ' DROP CONSTRAINT [' + @constraintName + ']')
+                END
+                ALTER TABLE [foo1] ALTER COLUMN [bar] varchar(255)
+                SQL,
+            ], [
+                ColumnBuilder::string()->notNull(),
+                <<<SQL
+                DECLARE @tableName VARCHAR(MAX) = '[foo1]'
+                DECLARE @columnName VARCHAR(MAX) = 'bar'
+                WHILE 1=1 BEGIN
+                    DECLARE @constraintName NVARCHAR(128)
+                    SET @constraintName = (SELECT TOP 1 OBJECT_NAME(cons.[object_id])
+                        FROM (
+                            SELECT sc.[constid] object_id
+                            FROM [sys].[sysconstraints] sc
+                            JOIN [sys].[columns] c ON c.[object_id]=sc.[id] AND c.[column_id]=sc.[colid] AND c.[name]=@columnName
+                            WHERE sc.[id] = OBJECT_ID(@tableName)
+                            UNION
+                            SELECT object_id(i.[name]) FROM [sys].[indexes] i
+                            JOIN [sys].[columns] c ON c.[object_id]=i.[object_id] AND c.[name]=@columnName
+                            JOIN [sys].[index_columns] ic ON ic.[object_id]=i.[object_id] AND i.[index_id]=ic.[index_id] AND c.[column_id]=ic.[column_id]
+                            WHERE i.[is_unique_constraint]=1 and i.[object_id]=OBJECT_ID(@tableName)
+                        ) cons
+                        JOIN [sys].[objects] so ON so.[object_id]=cons.[object_id]
+                         WHERE so.[type]='D')
+                    IF @constraintName IS NULL BREAK
+                    EXEC (N'ALTER TABLE ' + @tableName + ' DROP CONSTRAINT [' + @constraintName + ']')
+                END
+                ALTER TABLE [foo1] ALTER COLUMN [bar] nvarchar(255) NOT NULL
+                SQL,
+            ], [
+                ColumnBuilder::string()->check('LEN(bar) > 5'),
+                <<<SQL
+                DECLARE @tableName VARCHAR(MAX) = '[foo1]'
+                DECLARE @columnName VARCHAR(MAX) = 'bar'
+                WHILE 1=1 BEGIN
+                    DECLARE @constraintName NVARCHAR(128)
+                    SET @constraintName = (SELECT TOP 1 OBJECT_NAME(cons.[object_id])
+                        FROM (
+                            SELECT sc.[constid] object_id
+                            FROM [sys].[sysconstraints] sc
+                            JOIN [sys].[columns] c ON c.[object_id]=sc.[id] AND c.[column_id]=sc.[colid] AND c.[name]=@columnName
+                            WHERE sc.[id] = OBJECT_ID(@tableName)
+                            UNION
+                            SELECT object_id(i.[name]) FROM [sys].[indexes] i
+                            JOIN [sys].[columns] c ON c.[object_id]=i.[object_id] AND c.[name]=@columnName
+                            JOIN [sys].[index_columns] ic ON ic.[object_id]=i.[object_id] AND i.[index_id]=ic.[index_id] AND c.[column_id]=ic.[column_id]
+                            WHERE i.[is_unique_constraint]=1 and i.[object_id]=OBJECT_ID(@tableName)
+                        ) cons
+                        JOIN [sys].[objects] so ON so.[object_id]=cons.[object_id]
+                         WHERE so.[type]='D')
+                    IF @constraintName IS NULL BREAK
+                    EXEC (N'ALTER TABLE ' + @tableName + ' DROP CONSTRAINT [' + @constraintName + ']')
+                END
+                ALTER TABLE [foo1] ALTER COLUMN [bar] nvarchar(255)
+                ALTER TABLE [foo1] ADD CONSTRAINT [CK_foo1_bar] CHECK (LEN(bar) > 5)
+                SQL,
+            ], [
+                ColumnBuilder::string()->defaultValue(''),
+                <<<SQL
+                DECLARE @tableName VARCHAR(MAX) = '[foo1]'
+                DECLARE @columnName VARCHAR(MAX) = 'bar'
+                WHILE 1=1 BEGIN
+                    DECLARE @constraintName NVARCHAR(128)
+                    SET @constraintName = (SELECT TOP 1 OBJECT_NAME(cons.[object_id])
+                        FROM (
+                            SELECT sc.[constid] object_id
+                            FROM [sys].[sysconstraints] sc
+                            JOIN [sys].[columns] c ON c.[object_id]=sc.[id] AND c.[column_id]=sc.[colid] AND c.[name]=@columnName
+                            WHERE sc.[id] = OBJECT_ID(@tableName)
+                            UNION
+                            SELECT object_id(i.[name]) FROM [sys].[indexes] i
+                            JOIN [sys].[columns] c ON c.[object_id]=i.[object_id] AND c.[name]=@columnName
+                            JOIN [sys].[index_columns] ic ON ic.[object_id]=i.[object_id] AND i.[index_id]=ic.[index_id] AND c.[column_id]=ic.[column_id]
+                            WHERE i.[is_unique_constraint]=1 and i.[object_id]=OBJECT_ID(@tableName)
+                        ) cons
+                        JOIN [sys].[objects] so ON so.[object_id]=cons.[object_id]
+                         WHERE so.[type]='D')
+                    IF @constraintName IS NULL BREAK
+                    EXEC (N'ALTER TABLE ' + @tableName + ' DROP CONSTRAINT [' + @constraintName + ']')
+                END
+                ALTER TABLE [foo1] ALTER COLUMN [bar] nvarchar(255)
+                ALTER TABLE [foo1] ADD CONSTRAINT [DF_foo1_bar] DEFAULT '' FOR [bar]
+                SQL,
+            ], [
+                ColumnBuilder::string()->defaultValue('AbCdE'),
+                <<<SQL
+                DECLARE @tableName VARCHAR(MAX) = '[foo1]'
+                DECLARE @columnName VARCHAR(MAX) = 'bar'
+                WHILE 1=1 BEGIN
+                    DECLARE @constraintName NVARCHAR(128)
+                    SET @constraintName = (SELECT TOP 1 OBJECT_NAME(cons.[object_id])
+                        FROM (
+                            SELECT sc.[constid] object_id
+                            FROM [sys].[sysconstraints] sc
+                            JOIN [sys].[columns] c ON c.[object_id]=sc.[id] AND c.[column_id]=sc.[colid] AND c.[name]=@columnName
+                            WHERE sc.[id] = OBJECT_ID(@tableName)
+                            UNION
+                            SELECT object_id(i.[name]) FROM [sys].[indexes] i
+                            JOIN [sys].[columns] c ON c.[object_id]=i.[object_id] AND c.[name]=@columnName
+                            JOIN [sys].[index_columns] ic ON ic.[object_id]=i.[object_id] AND i.[index_id]=ic.[index_id] AND c.[column_id]=ic.[column_id]
+                            WHERE i.[is_unique_constraint]=1 and i.[object_id]=OBJECT_ID(@tableName)
+                        ) cons
+                        JOIN [sys].[objects] so ON so.[object_id]=cons.[object_id]
+                         WHERE so.[type]='D')
+                    IF @constraintName IS NULL BREAK
+                    EXEC (N'ALTER TABLE ' + @tableName + ' DROP CONSTRAINT [' + @constraintName + ']')
+                END
+                ALTER TABLE [foo1] ALTER COLUMN [bar] nvarchar(255)
+                ALTER TABLE [foo1] ADD CONSTRAINT [DF_foo1_bar] DEFAULT 'AbCdE' FOR [bar]
+                SQL,
+            ], [
+                ColumnBuilder::timestamp()->defaultValue(new Expression('CURRENT_TIMESTAMP')),
+                <<<SQL
+                DECLARE @tableName VARCHAR(MAX) = '[foo1]'
+                DECLARE @columnName VARCHAR(MAX) = 'bar'
+                WHILE 1=1 BEGIN
+                    DECLARE @constraintName NVARCHAR(128)
+                    SET @constraintName = (SELECT TOP 1 OBJECT_NAME(cons.[object_id])
+                        FROM (
+                            SELECT sc.[constid] object_id
+                            FROM [sys].[sysconstraints] sc
+                            JOIN [sys].[columns] c ON c.[object_id]=sc.[id] AND c.[column_id]=sc.[colid] AND c.[name]=@columnName
+                            WHERE sc.[id] = OBJECT_ID(@tableName)
+                            UNION
+                            SELECT object_id(i.[name]) FROM [sys].[indexes] i
+                            JOIN [sys].[columns] c ON c.[object_id]=i.[object_id] AND c.[name]=@columnName
+                            JOIN [sys].[index_columns] ic ON ic.[object_id]=i.[object_id] AND i.[index_id]=ic.[index_id] AND c.[column_id]=ic.[column_id]
+                            WHERE i.[is_unique_constraint]=1 and i.[object_id]=OBJECT_ID(@tableName)
+                        ) cons
+                        JOIN [sys].[objects] so ON so.[object_id]=cons.[object_id]
+                         WHERE so.[type]='D')
+                    IF @constraintName IS NULL BREAK
+                    EXEC (N'ALTER TABLE ' + @tableName + ' DROP CONSTRAINT [' + @constraintName + ']')
+                END
+                ALTER TABLE [foo1] ALTER COLUMN [bar] datetime2(0)
+                ALTER TABLE [foo1] ADD CONSTRAINT [DF_foo1_bar] DEFAULT CURRENT_TIMESTAMP FOR [bar]
+                SQL,
+            ], [
+                ColumnBuilder::string(30)->unique(),
+                <<<SQL
+                DECLARE @tableName VARCHAR(MAX) = '[foo1]'
+                DECLARE @columnName VARCHAR(MAX) = 'bar'
+                WHILE 1=1 BEGIN
+                    DECLARE @constraintName NVARCHAR(128)
+                    SET @constraintName = (SELECT TOP 1 OBJECT_NAME(cons.[object_id])
+                        FROM (
+                            SELECT sc.[constid] object_id
+                            FROM [sys].[sysconstraints] sc
+                            JOIN [sys].[columns] c ON c.[object_id]=sc.[id] AND c.[column_id]=sc.[colid] AND c.[name]=@columnName
+                            WHERE sc.[id] = OBJECT_ID(@tableName)
+                            UNION
+                            SELECT object_id(i.[name]) FROM [sys].[indexes] i
+                            JOIN [sys].[columns] c ON c.[object_id]=i.[object_id] AND c.[name]=@columnName
+                            JOIN [sys].[index_columns] ic ON ic.[object_id]=i.[object_id] AND i.[index_id]=ic.[index_id] AND c.[column_id]=ic.[column_id]
+                            WHERE i.[is_unique_constraint]=1 and i.[object_id]=OBJECT_ID(@tableName)
+                        ) cons
+                        JOIN [sys].[objects] so ON so.[object_id]=cons.[object_id]
+                         WHERE so.[type]='D')
+                    IF @constraintName IS NULL BREAK
+                    EXEC (N'ALTER TABLE ' + @tableName + ' DROP CONSTRAINT [' + @constraintName + ']')
+                END
+                ALTER TABLE [foo1] ALTER COLUMN [bar] nvarchar(30)
+                ALTER TABLE [foo1] ADD CONSTRAINT [UQ_foo1_bar] UNIQUE ([bar])
+                SQL,
+            ],
+        ];
+    }
+
     public static function buildCondition(): array
     {
         $buildCondition = parent::buildCondition();
diff --git a/tests/QueryBuilderTest.php b/tests/QueryBuilderTest.php
index c958d82f..c9969d6b 100644
--- a/tests/QueryBuilderTest.php
+++ b/tests/QueryBuilderTest.php
@@ -7,7 +7,6 @@
 use JsonException;
 use PHPUnit\Framework\Attributes\DataProviderExternal;
 use Throwable;
-use Yiisoft\Db\Constant\ColumnType;
 use Yiisoft\Db\Exception\Exception;
 use Yiisoft\Db\Exception\IntegrityException;
 use Yiisoft\Db\Exception\InvalidArgumentException;
@@ -15,7 +14,7 @@
 use Yiisoft\Db\Exception\NotSupportedException;
 use Yiisoft\Db\Expression\Expression;
 use Yiisoft\Db\Expression\ExpressionInterface;
-use Yiisoft\Db\Mssql\Column;
+use Yiisoft\Db\Mssql\Column\ColumnBuilder;
 use Yiisoft\Db\Mssql\Tests\Provider\QueryBuilderProvider;
 use Yiisoft\Db\Mssql\Tests\Support\TestTrait;
 use Yiisoft\Db\Query\Query;
@@ -34,6 +33,11 @@ final class QueryBuilderTest extends CommonQueryBuilderTest
 {
     use TestTrait;
 
+    public function getBuildColumnDefinitionProvider(): array
+    {
+        return QueryBuilderProvider::buildColumnDefinition();
+    }
+
     /**
      * @throws Exception
      */
@@ -607,233 +611,10 @@ public function testUpsertVarbinary(): void
         $this->assertSame($testData, $resultData['blob_col']);
     }
 
-    /**
-     * @throws Exception
-     * @throws InvalidConfigException
-     */
-    public function testAlterColumn(): void
+    #[DataProviderExternal(QueryBuilderProvider::class, 'alterColumn')]
+    public function testAlterColumn(string|ColumnSchemaInterface $type, string $expected): void
     {
-        $db = $this->getConnection(true);
-
-        $qb = $db->getQueryBuilder();
-
-        $expected = <<<SQL
-            DECLARE @tableName VARCHAR(MAX) = '[foo1]'
-            DECLARE @columnName VARCHAR(MAX) = 'bar'
-            WHILE 1=1 BEGIN
-                DECLARE @constraintName NVARCHAR(128)
-                SET @constraintName = (SELECT TOP 1 OBJECT_NAME(cons.[object_id])
-                    FROM (
-                        SELECT sc.[constid] object_id
-                        FROM [sys].[sysconstraints] sc
-                        JOIN [sys].[columns] c ON c.[object_id]=sc.[id] AND c.[column_id]=sc.[colid] AND c.[name]=@columnName
-                        WHERE sc.[id] = OBJECT_ID(@tableName)
-                        UNION
-                        SELECT object_id(i.[name]) FROM [sys].[indexes] i
-                        JOIN [sys].[columns] c ON c.[object_id]=i.[object_id] AND c.[name]=@columnName
-                        JOIN [sys].[index_columns] ic ON ic.[object_id]=i.[object_id] AND i.[index_id]=ic.[index_id] AND c.[column_id]=ic.[column_id]
-                        WHERE i.[is_unique_constraint]=1 and i.[object_id]=OBJECT_ID(@tableName)
-                    ) cons
-                    JOIN [sys].[objects] so ON so.[object_id]=cons.[object_id]
-                     WHERE so.[type]='D')
-                IF @constraintName IS NULL BREAK
-                EXEC (N'ALTER TABLE ' + @tableName + ' DROP CONSTRAINT [' + @constraintName + ']')
-            END
-            ALTER TABLE [foo1] ALTER COLUMN [bar] varchar(255)
-            SQL;
-        $sql = $qb->alterColumn('foo1', 'bar', 'varchar(255)');
-        $this->assertEquals($expected, $sql);
-
-        $expected = <<<SQL
-            DECLARE @tableName VARCHAR(MAX) = '[foo1]'
-            DECLARE @columnName VARCHAR(MAX) = 'bar'
-            WHILE 1=1 BEGIN
-                DECLARE @constraintName NVARCHAR(128)
-                SET @constraintName = (SELECT TOP 1 OBJECT_NAME(cons.[object_id])
-                    FROM (
-                        SELECT sc.[constid] object_id
-                        FROM [sys].[sysconstraints] sc
-                        JOIN [sys].[columns] c ON c.[object_id]=sc.[id] AND c.[column_id]=sc.[colid] AND c.[name]=@columnName
-                        WHERE sc.[id] = OBJECT_ID(@tableName)
-                        UNION
-                        SELECT object_id(i.[name]) FROM [sys].[indexes] i
-                        JOIN [sys].[columns] c ON c.[object_id]=i.[object_id] AND c.[name]=@columnName
-                        JOIN [sys].[index_columns] ic ON ic.[object_id]=i.[object_id] AND i.[index_id]=ic.[index_id] AND c.[column_id]=ic.[column_id]
-                        WHERE i.[is_unique_constraint]=1 and i.[object_id]=OBJECT_ID(@tableName)
-                    ) cons
-                    JOIN [sys].[objects] so ON so.[object_id]=cons.[object_id]
-                     WHERE so.[type]='D')
-                IF @constraintName IS NULL BREAK
-                EXEC (N'ALTER TABLE ' + @tableName + ' DROP CONSTRAINT [' + @constraintName + ']')
-            END
-            ALTER TABLE [foo1] ALTER COLUMN [bar] nvarchar(255) NOT NULL
-            SQL;
-        $sql = $qb->alterColumn(
-            'foo1',
-            'bar',
-            (new Column(ColumnType::STRING, 255))->notNull()
-        );
-        $this->assertEquals($expected, $sql);
-
-        $expected = <<<SQL
-            DECLARE @tableName VARCHAR(MAX) = '[foo1]'
-            DECLARE @columnName VARCHAR(MAX) = 'bar'
-            WHILE 1=1 BEGIN
-                DECLARE @constraintName NVARCHAR(128)
-                SET @constraintName = (SELECT TOP 1 OBJECT_NAME(cons.[object_id])
-                    FROM (
-                        SELECT sc.[constid] object_id
-                        FROM [sys].[sysconstraints] sc
-                        JOIN [sys].[columns] c ON c.[object_id]=sc.[id] AND c.[column_id]=sc.[colid] AND c.[name]=@columnName
-                        WHERE sc.[id] = OBJECT_ID(@tableName)
-                        UNION
-                        SELECT object_id(i.[name]) FROM [sys].[indexes] i
-                        JOIN [sys].[columns] c ON c.[object_id]=i.[object_id] AND c.[name]=@columnName
-                        JOIN [sys].[index_columns] ic ON ic.[object_id]=i.[object_id] AND i.[index_id]=ic.[index_id] AND c.[column_id]=ic.[column_id]
-                        WHERE i.[is_unique_constraint]=1 and i.[object_id]=OBJECT_ID(@tableName)
-                    ) cons
-                    JOIN [sys].[objects] so ON so.[object_id]=cons.[object_id]
-                     WHERE so.[type]='D')
-                IF @constraintName IS NULL BREAK
-                EXEC (N'ALTER TABLE ' + @tableName + ' DROP CONSTRAINT [' + @constraintName + ']')
-            END
-            ALTER TABLE [foo1] ALTER COLUMN [bar] nvarchar(255)
-            ALTER TABLE [foo1] ADD CONSTRAINT [CK_foo1_bar] CHECK (LEN(bar) > 5)
-            SQL;
-        $sql = $qb->alterColumn(
-            'foo1',
-            'bar',
-            (new Column(ColumnType::STRING, 255))->check('LEN(bar) > 5')
-        );
-        $this->assertEquals($expected, $sql);
-
-        $expected = <<<SQL
-            DECLARE @tableName VARCHAR(MAX) = '[foo1]'
-            DECLARE @columnName VARCHAR(MAX) = 'bar'
-            WHILE 1=1 BEGIN
-                DECLARE @constraintName NVARCHAR(128)
-                SET @constraintName = (SELECT TOP 1 OBJECT_NAME(cons.[object_id])
-                    FROM (
-                        SELECT sc.[constid] object_id
-                        FROM [sys].[sysconstraints] sc
-                        JOIN [sys].[columns] c ON c.[object_id]=sc.[id] AND c.[column_id]=sc.[colid] AND c.[name]=@columnName
-                        WHERE sc.[id] = OBJECT_ID(@tableName)
-                        UNION
-                        SELECT object_id(i.[name]) FROM [sys].[indexes] i
-                        JOIN [sys].[columns] c ON c.[object_id]=i.[object_id] AND c.[name]=@columnName
-                        JOIN [sys].[index_columns] ic ON ic.[object_id]=i.[object_id] AND i.[index_id]=ic.[index_id] AND c.[column_id]=ic.[column_id]
-                        WHERE i.[is_unique_constraint]=1 and i.[object_id]=OBJECT_ID(@tableName)
-                    ) cons
-                    JOIN [sys].[objects] so ON so.[object_id]=cons.[object_id]
-                     WHERE so.[type]='D')
-                IF @constraintName IS NULL BREAK
-                EXEC (N'ALTER TABLE ' + @tableName + ' DROP CONSTRAINT [' + @constraintName + ']')
-            END
-            ALTER TABLE [foo1] ALTER COLUMN [bar] nvarchar(255)
-            ALTER TABLE [foo1] ADD CONSTRAINT [DF_foo1_bar] DEFAULT '' FOR [bar]
-            SQL;
-        $sql = $qb->alterColumn(
-            'foo1',
-            'bar',
-            (new Column(ColumnType::STRING, 255))->defaultValue('')
-        );
-        $this->assertEquals($expected, $sql);
-
-        $expected = <<<SQL
-            DECLARE @tableName VARCHAR(MAX) = '[foo1]'
-            DECLARE @columnName VARCHAR(MAX) = 'bar'
-            WHILE 1=1 BEGIN
-                DECLARE @constraintName NVARCHAR(128)
-                SET @constraintName = (SELECT TOP 1 OBJECT_NAME(cons.[object_id])
-                    FROM (
-                        SELECT sc.[constid] object_id
-                        FROM [sys].[sysconstraints] sc
-                        JOIN [sys].[columns] c ON c.[object_id]=sc.[id] AND c.[column_id]=sc.[colid] AND c.[name]=@columnName
-                        WHERE sc.[id] = OBJECT_ID(@tableName)
-                        UNION
-                        SELECT object_id(i.[name]) FROM [sys].[indexes] i
-                        JOIN [sys].[columns] c ON c.[object_id]=i.[object_id] AND c.[name]=@columnName
-                        JOIN [sys].[index_columns] ic ON ic.[object_id]=i.[object_id] AND i.[index_id]=ic.[index_id] AND c.[column_id]=ic.[column_id]
-                        WHERE i.[is_unique_constraint]=1 and i.[object_id]=OBJECT_ID(@tableName)
-                    ) cons
-                    JOIN [sys].[objects] so ON so.[object_id]=cons.[object_id]
-                     WHERE so.[type]='D')
-                IF @constraintName IS NULL BREAK
-                EXEC (N'ALTER TABLE ' + @tableName + ' DROP CONSTRAINT [' + @constraintName + ']')
-            END
-            ALTER TABLE [foo1] ALTER COLUMN [bar] nvarchar(255)
-            ALTER TABLE [foo1] ADD CONSTRAINT [DF_foo1_bar] DEFAULT 'AbCdE' FOR [bar]
-            SQL;
-        $sql = $qb->alterColumn(
-            'foo1',
-            'bar',
-            (new Column(ColumnType::STRING, 255))->defaultValue('AbCdE')
-        );
-        $this->assertEquals($expected, $sql);
-
-        $expected = <<<SQL
-            DECLARE @tableName VARCHAR(MAX) = '[foo1]'
-            DECLARE @columnName VARCHAR(MAX) = 'bar'
-            WHILE 1=1 BEGIN
-                DECLARE @constraintName NVARCHAR(128)
-                SET @constraintName = (SELECT TOP 1 OBJECT_NAME(cons.[object_id])
-                    FROM (
-                        SELECT sc.[constid] object_id
-                        FROM [sys].[sysconstraints] sc
-                        JOIN [sys].[columns] c ON c.[object_id]=sc.[id] AND c.[column_id]=sc.[colid] AND c.[name]=@columnName
-                        WHERE sc.[id] = OBJECT_ID(@tableName)
-                        UNION
-                        SELECT object_id(i.[name]) FROM [sys].[indexes] i
-                        JOIN [sys].[columns] c ON c.[object_id]=i.[object_id] AND c.[name]=@columnName
-                        JOIN [sys].[index_columns] ic ON ic.[object_id]=i.[object_id] AND i.[index_id]=ic.[index_id] AND c.[column_id]=ic.[column_id]
-                        WHERE i.[is_unique_constraint]=1 and i.[object_id]=OBJECT_ID(@tableName)
-                    ) cons
-                    JOIN [sys].[objects] so ON so.[object_id]=cons.[object_id]
-                     WHERE so.[type]='D')
-                IF @constraintName IS NULL BREAK
-                EXEC (N'ALTER TABLE ' + @tableName + ' DROP CONSTRAINT [' + @constraintName + ']')
-            END
-            ALTER TABLE [foo1] ALTER COLUMN [bar] datetime
-            ALTER TABLE [foo1] ADD CONSTRAINT [DF_foo1_bar] DEFAULT CURRENT_TIMESTAMP FOR [bar]
-            SQL;
-        $sql = $qb->alterColumn(
-            'foo1',
-            'bar',
-            (new Column(ColumnType::TIMESTAMP))->defaultExpression('CURRENT_TIMESTAMP')
-        );
-        $this->assertEquals($expected, $sql);
-
-        $expected = <<<SQL
-            DECLARE @tableName VARCHAR(MAX) = '[foo1]'
-            DECLARE @columnName VARCHAR(MAX) = 'bar'
-            WHILE 1=1 BEGIN
-                DECLARE @constraintName NVARCHAR(128)
-                SET @constraintName = (SELECT TOP 1 OBJECT_NAME(cons.[object_id])
-                    FROM (
-                        SELECT sc.[constid] object_id
-                        FROM [sys].[sysconstraints] sc
-                        JOIN [sys].[columns] c ON c.[object_id]=sc.[id] AND c.[column_id]=sc.[colid] AND c.[name]=@columnName
-                        WHERE sc.[id] = OBJECT_ID(@tableName)
-                        UNION
-                        SELECT object_id(i.[name]) FROM [sys].[indexes] i
-                        JOIN [sys].[columns] c ON c.[object_id]=i.[object_id] AND c.[name]=@columnName
-                        JOIN [sys].[index_columns] ic ON ic.[object_id]=i.[object_id] AND i.[index_id]=ic.[index_id] AND c.[column_id]=ic.[column_id]
-                        WHERE i.[is_unique_constraint]=1 and i.[object_id]=OBJECT_ID(@tableName)
-                    ) cons
-                    JOIN [sys].[objects] so ON so.[object_id]=cons.[object_id]
-                     WHERE so.[type]='D')
-                IF @constraintName IS NULL BREAK
-                EXEC (N'ALTER TABLE ' + @tableName + ' DROP CONSTRAINT [' + @constraintName + ']')
-            END
-            ALTER TABLE [foo1] ALTER COLUMN [bar] nvarchar(30)
-            ALTER TABLE [foo1] ADD CONSTRAINT [UQ_foo1_bar] UNIQUE ([bar])
-            SQL;
-        $sql = $qb->alterColumn(
-            'foo1',
-            'bar',
-            (new Column(ColumnType::STRING, 30))->unique()
-        );
-        $this->assertEquals($expected, $sql);
+        parent::testAlterColumn($type, $expected);
     }
 
     /**
@@ -856,7 +637,7 @@ public function testAlterColumnOnDb(): void
         $sql = $db->getQueryBuilder()->alterColumn(
             'foo1',
             'bar',
-            (new Column(ColumnType::STRING, 128))->notNull()
+            ColumnBuilder::string(128)->notNull()
         );
         $db->createCommand($sql)->execute();
         $schema = $db->getTableSchema('[foo1]', true);
@@ -868,11 +649,11 @@ public function testAlterColumnOnDb(): void
         $sql = $db->getQueryBuilder()->alterColumn(
             'foo1',
             'bar',
-            (new Column(ColumnType::TIMESTAMP))->defaultExpression('CURRENT_TIMESTAMP')
+            ColumnBuilder::timestamp()->defaultValue(new Expression('CURRENT_TIMESTAMP'))
         );
         $db->createCommand($sql)->execute();
         $schema = $db->getTableSchema('[foo1]', true);
-        $this->assertSame(ColumnType::DATETIME, $schema?->getColumn('bar')->getDbType());
+        $this->assertSame('datetime2', $schema?->getColumn('bar')->getDbType());
         $this->assertEquals(new Expression('getdate()'), $schema?->getColumn('bar')->getDefaultValue());
     }
 
@@ -888,7 +669,7 @@ public function testAlterColumnWithCheckConstraintOnDb(): void
         $sql = $db->getQueryBuilder()->alterColumn(
             'foo1',
             'bar',
-            (new Column(ColumnType::STRING, 128))->null()->check('LEN(bar) > 5')
+            ColumnBuilder::string(128)->null()->check('LEN(bar) > 5')
         );
         $db->createCommand($sql)->execute();
         $schema = $db->getTableSchema('[foo1]', true);
@@ -912,7 +693,7 @@ public function testAlterColumnWithCheckConstraintOnDbWithException(): void
         $sql = $db->getQueryBuilder()->alterColumn(
             'foo1',
             'bar',
-            (new Column(ColumnType::STRING, 64))->check('LEN(bar) > 5')
+            ColumnBuilder::string(64)->check('LEN(bar) > 5')
         );
         $db->createCommand($sql)->execute();
 
@@ -933,7 +714,7 @@ public function testAlterColumnWithUniqueConstraintOnDbWithException(): void
         $sql = $db->getQueryBuilder()->alterColumn(
             'foo1',
             'bar',
-            (new Column(ColumnType::STRING, 64))->unique()
+            ColumnBuilder::string(64)->unique()
         );
         $db->createCommand($sql)->execute();
 
@@ -1017,7 +798,7 @@ public function testDropColumnOnDb(): void
         $sql = $db->getQueryBuilder()->alterColumn(
             'foo1',
             'bar',
-            (new Column(ColumnType::STRING, 64))
+            ColumnBuilder::string(64)
                 ->defaultValue('')
                 ->check('LEN(bar) < 5')
                 ->unique()
@@ -1067,7 +848,7 @@ public function testAlterColumnWithNull(): void
         $sql = $qb->alterColumn(
             'foo1',
             'bar',
-            (new Column(ColumnType::INTEGER))->null()->defaultValue(null)
+            ColumnBuilder::integer()->null()->defaultValue(null)
         );
         $this->assertEquals($expected, $sql);
 
@@ -1093,13 +874,13 @@ public function testAlterColumnWithNull(): void
                 IF @constraintName IS NULL BREAK
                 EXEC (N'ALTER TABLE ' + @tableName + ' DROP CONSTRAINT [' + @constraintName + ']')
             END
-            ALTER TABLE [foo1] ALTER COLUMN [bar] int NULL
+            ALTER TABLE [foo1] ALTER COLUMN [bar] int
             ALTER TABLE [foo1] ADD CONSTRAINT [DF_foo1_bar] DEFAULT NULL FOR [bar]
             SQL;
         $sql = $qb->alterColumn(
             'foo1',
             'bar',
-            (new Column(ColumnType::INTEGER))->defaultValue(null)
+            ColumnBuilder::integer()->defaultValue(null)
         );
         $this->assertEquals($expected, $sql);
     }
@@ -1140,7 +921,7 @@ public function testAlterColumnWithExpression(): void
         $sql = $qb->alterColumn(
             'foo1',
             'bar',
-            (new Column(ColumnType::INTEGER))
+            ColumnBuilder::integer()
                 ->null()
                 ->defaultValue(new Expression('CAST(GETDATE() AS INT)'))
         );