SQL Server Course for Beginners with 100+ examples - Stored Procedures in SQL

The video tutorial explains the concept of aliases in SQL, which are used to give temporary names to tables or columns, making them more readable. It demonstrates how to use the AS keyword to create an alias, using a database example with an Employee table. The tutorial shows how to select specific columns and apply aliases to them, highlighting that aliases are temporary and only last for the duration of the query. The benefits of using aliases for readability are also discussed.

What is the primary purpose of using an alias in SQL?

• To permanently rename a table or column

• To temporarily rename a table or column for readability

• To encrypt data in a table or column

• To delete a table or column

Which keyword is used to create an alias in SQL?

• WHERE

• AS

• FROM

• SELECT

In the example provided, what alias is given to the 'EMP name' column?

• Employee

• My Result

• Name

• Alias Name

What happens to an alias after the query is executed?

• It disappears and the original column name is restored

• It is stored in the database

• It becomes a permanent column name

• It is saved for future queries

Why might you use an alias when dealing with large tables?

• To reduce the size of the table

• To make the results more readable

• To increase the number of columns

• To permanently change column names