SQL Aliases

In SQL, aliases are used to give a table or a column a temporary name for the duration of a query. They are useful for simplifying complex queries, improving readability, and providing shorter or more meaningful names for columns or tables.

Syntax

The basic syntax for using aliases is:

SELECT column_name AS alias_name
FROM table_name AS alias_name;

        

Example

Consider a table named Employees. To select the employee's first name and give it an alias of FirstName, you can use the following query:

SELECT first_name AS FirstName
FROM Employees;

        

Explanation

• SELECT column_name AS alias_name: Defines an alias for a column in the result set.
• FROM table_name AS alias_name: Defines an alias for a table in the query.