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How can user variables be used in MySQL stored procedure?
In MySQL stored procedure, user variables are referenced with an ampersand i.e. @, prefixed to the user variable names. For example, @A, @B, etc. are user variables. To demonstrate it, we are creating the following procedure −
mysql> DELIMITER // ; mysql> CREATE PROCEDURE Proc_Uservariables() -> BEGIN -> SET @A = 100; -> SET @B = 500; -> SELECT @A,@B,@A+@B; -> END // Query OK, 0 rows affected (0.00 sec) mysql> Delimiter ; // mysql> CALL Proc_Uservariables(); +------+------+-------+ | @A | @B | @A+@B | +------+------+-------+ | 100 | 500 | 600 | +------+------+-------+ 1 row in set (0.00 sec) Query OK, 0 rows affected (0.01 sec)
Updated on: 22-Jun-2020
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