From IF-ELSE to CASE Statement: Implementing Conditional Logic in SQL
Surely as an SQL developer, you found yourself one day in the situation where you want to implement an IF-ELSE statement when working with SQL and database tables. In this brief article we will explore the CASE statement which is equivalent to an IF-ELSE statement
The CASE statement checks each time conditions and returns a value when the condition is satisfied. It returns simply the specified value after the THEN clause.
The CASE statement returns NULL if there isn't an ELSE clause and none of the conditions are true.
In the example below, we will see how to implement the CASE statement inside a standard SELECT statement.