讓我們先看看MySQL 中IF NOT IN 的語法-
if(yourVariableName NOT IN (yourValue1,yourValue2,........N) ) then statement1 else statement2 endif
讓我們實作上述語法以使用IF NOT IN -
mysql> DELIMITER // mysql> 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 -> // Query OK, 0 rows affected (0.25 sec) mysql> DELIMITER ;
#現在使用CALL 指令呼叫預存程序。
情況1 - 當找到值時-
mysql> call IF_NOT_INDemo(10);
+-------------+ | Value Found | +-------------+ | Value Found | +-------------+ 1 row in set (0.00 sec) Query OK, 0 rows affected (0.01 sec)
情況2 - 找不到值時-
mysql> call IF_NOT_INDemo(100);
+-----------------+ | Value Not Found | +-----------------+ | Value Not Found | +-----------------+ 1 row in set (0.05 sec) Query OK, 0 rows affected (0.07 sec)
以上是我們可以在 MySQL 流程中使用「IF NOT IN」嗎?的詳細內容。更多資訊請關注PHP中文網其他相關文章!