能在MySQL过程中使用IF NOT IN吗？
首先让我们看看IFNOTIN在MySQL中的语法-
if(yourVariableName NOT IN (yourValue1,yourValue2,........N) ) then statement1 else statement2 endif
让我们实现以上语法以使用IFNOTIN-
DELIMITER // CREATE PROCEDURE IF_NOT_INDemo(IN value int) -> BEGIN -> if(value NOT IN (10,20,30) ) then -> select "Value Not Found"; -> else -> select "Value Found"; -> end if; -> END -> // DELIMITER ;
现在使用CALL命令调用存储过程。
情况1-当找到一个值时-
call IF_NOT_INDemo(10);
输出结果
+-------------+ | Value Found | +-------------+ | Value Found | +-------------+ 1 row in set (0.00 sec)
情况2-当找不到值时-
call IF_NOT_INDemo(100);
输出结果
+-----------------+ | Value Not Found | +-----------------+ | Value Not Found | +-----------------+ 1 row in set (0.05 sec)