In MySQL, the IF…ELSEIF logic can be implemented in a SELECT query using the CASE statement. This allows you to evaluate conditions and return specific values based on those conditions.
Syntax of CASE:
The CASE statement evaluates conditions sequentially and executes the first matching condition.
If no conditions match, it returns the value in the ELSE clause (if provided); otherwise, it returns NULL.
Use Cases:
Simple CASE: Compares a value against a list of possible values.
Searched CASE: Uses conditional expressions for more complex logic.
Example:
You can use the CASE statement to apply conditional logic, like categorizing data or performing calculations, directly within a SELECT query.