Build and Destroy: Introductory SQL Queries

Given the scenarios, add the the directed queries to the "answers" directory's files.

Creating databases

Write the correct SQL statement to create a new database called myNewDB.

(Add your query to the file exercise1.sql)

Deleting databases

Write the correct SQL statement to delete a database named myNewDB.

(Add your query to the file exercise2.sql)

Creating tables

Write the correct SQL statement to create a new table called Users, with an int field called UserID, and the following varchar fields of size 255: LastName, FirstName, Address, City

(Add your query to the file exercise3.sql)

Deleting tables

Write the correct SQL statement to delete a table called Users.

(Add your query to the file exercise4.sql)

Use the TRUNCATE statement to delete all data inside the Users table.

(Add your query to the file exercise5.sql)

Altering tables

Add a column of type DATE called Birthday to the Users table.

(Add your query to the file exercise6.sql)

Delete the column Birthday from the Users table.

(Add your query to the file exercise7.sql)

Inserting records

Insert a new record in the Students table.

Schema:

StudentName,
Address, 
City, 
PostalCode,
Country

Record's info to enter:

Jane Doe
57 Union St
Glasgow, Scotland
G13RB

(Add your query to the file exercise8.sql)

Selecting Records

Where

Use the NOT keyword to select all records in the Students table where City is NOT "Philadelphia".

(Add your query to the file exercise9.sql)

Select all records in the Students table where the City column has the value 'Philadelphia' or 'Trenton'.

(Add your query to the file exercise10.sql)

Order By

Select all records from the Students table, sort the result alphabetically by the column City.

(Add your query to the file exercise11.sql)

Select all records from the Students table, sort the result reversed alphabetically by the column City.

(Add your query to the file exercise12.sql)

Select all records from the Students table, sort the result alphabetically, first by the column Country, then by the column City.

(Add your query to the file exercise13.sql)

Null values

Select all records from the Students where the PostalCode column is empty.

(Add your query to the file exercise14.sql)

Select all records from the Students where the PostalCode column is NOT empty.

(Add your query to the file exercise15.sql)

Updating records

Update the City column of all records in the Students table and set it to "Edinburgh".

(Add your query to the file exercise16.sql)

Set the value of the City columns to "Edinburgh", but only the ones where the Country column has the value "Scotland".

(Add your query to the file exercise17.sql)

Update the City value and the Country value to "Edinburgh", "Scotland" in the Students table, for the Student whose ID is 35.

(Add your query to the file exercise18.sql)

Deleting Records

Delete all the records from the Students table where the Country value is "Scotland".

(Add your query to the file exercise19.sql)

Delete all the records from the Students table.

(Add your query to the file exercise20.sql)