Set conditions in a MySQL stored procedure

To set conditions in a stored procedure, use IF...ELSE in MySQL. Following is the syntax for if-else −

IF yourCondition then       yourStatement1,  ELSE           yourStatement2,  END IF;

Let us implement the above syntax in a stored procedure −

mysql> DELIMITER // mysql> CREATE PROCEDURE IF_ELSE_DEMO(IN value int)    -> BEGIN    ->    SET @val=value;    ->    IF @val > 10 then    ->       select concat(@val,' is greater than 10');    ->    ELSE    ->        select concat(@val,' is less than 10 ');    ->    END IF;    -> END;    -> // Query OK, 0 rows affected (0.16 sec)

mysql> DELIMITER ;

Now you can call the stored procedure using CALL command −

mysql> call IF_ELSE_DEMO(18);

This will produce the following output −

+------------------------------------+ | concat(@val,' is greater than 10') | +------------------------------------+ | 18 is greater than 10              | +------------------------------------+ 1 row in set (0.03 sec) Query OK, 0 rows affected (0.04 sec)