chore: new sql statements

Signed-off-by: Jeronimo Irazabal <[email protected]>

src/.vuepress/sidebar_master.js

@@ -125,6 +125,7 @@ export default version => {
   developSQL.children.push(`${version}/develop/sql/insertupdate`);
   developSQL.children.push(`${version}/develop/sql/indexes`);
   developSQL.children.push(`${version}/develop/sql/querying`);
+  developSQL.children.push(`${version}/develop/sql/users`);
   developSQL.children.push(`${version}/develop/sql/catalog`);
   developSQL.children.push(`${version}/develop/sql/sqlstdlib`);
   developSQL.children.push(`${version}/develop/sql/pg`);

src/master/develop/sql/catalog.md

@@ -23,6 +23,8 @@ This source can also be constrained using the `WHERE` clause and the set of colu
 SELECT name FROM DATABASES() WHERE name LIKE '.*db1.*';
 ```
 
+Alternatively, the `SHOW DATABASES` statement returns the list of databases that can be accessed by the current user.
+
 </WrappedSection>
 
 <WrappedSection>
@@ -43,6 +45,8 @@ SELECT name FROM TABLES()
 WHERE name like '.*est.*'
 ```
 
+Alternatively, the `SHOW TABLES` statement returns the list of tables in the currently selected database.
+
 </WrappedSection>
 
 <WrappedSection>
@@ -65,6 +69,8 @@ SELECT "table", "name", "type" FROM COLUMNS('mytable');
 SELECT name FROM COLUMNS('mytable') WHERE type = 'VARCHAR';
 ```
 
+Alternatively, the `SHOW TABLE mytable` statement will returns the list of columns for the specified table.
+
 </WrappedSection>
 
 <WrappedSection>

src/master/develop/sql/users.md

@@ -0,0 +1,42 @@
+# User Management
+
+<WrappedSection>
+
+### CREATE USER
+
+Users can be created with the `CREATE USER` statement as follows:
+
+```sql
+CREATE USER user1 WITH PASSWORD 'user1Password!' READWRITE;
+```
+
+Possible permissions are: `READ`, `READWRITE` and `ADMIN`.
+
+An admin user is able to fully manage the current database.
+
+</WrappedSection>
+
+<WrappedSection>
+
+### ALTER USER
+
+User password and permissions can be modified with the `ALTER USER` statement as follows:
+
+```sql
+ALTER USER user1 WITH PASSWORD 'newUser1Password!' ADMIN;
+```
+
+</WrappedSection>
+
+<WrappedSection>
+
+### DROP USER
+
+An existing user can be deleted.
+Deletion is logically done and the user can be reactivated by executing an `ALTER USER` statement.
+
+```sql
+DROP USER user1;
+```
+
+</WrappedSection>