如何在 MySQL 中迴圈遍歷儲存過程?
我們來看看如何在 MySQL 中迴圈遍歷一個儲存過程
mysql> DELIMITER // mysql> CREATE PROCEDURE do_WhileDemo(LastValue INT) -> BEGIN -> SET @loop = 0; -> REPEAT -> SET @loop= @loop+ 1; -> select @loop; -> UNTIL @loop >LastValue -> END REPEAT; -> END // Query OK, 0 rows affected (0.17 sec) mysql> DELIMITER ;
現在,使用 CALL 命令呼叫儲存過程。
查詢如下
mysql> call do_WhileDemo(10);
以下是輸出
+-------+ | @loop | +-------+ | 1 | +-------+ 1 row in set (0.00 sec) +-------+ | @loop | +-------+ | 2 | +-------+ 1 row in set (0.01 sec) +-------+ | @loop | +-------+ | 3 | +-------+ 1 row in set (0.02 sec) +-------+ | @loop | +-------+ | 4 | +-------+ 1 row in set (0.03 sec) +-------+ | @loop | +-------+ | 5 | +-------+ 1 row in set (0.04 sec) +-------+ | @loop | +-------+ | 6 | +-------+ 1 row in set (0.04 sec) +-------+ | @loop | +-------+ | 7 | +-------+ 1 row in set (0.05 sec) +-------+ | @loop | +-------+ | 8 | +-------+ 1 row in set (0.06 sec) +-------+ | @loop | +-------+ | 9 | +-------+ 1 row in set (0.07 sec) +-------+ | @loop | +-------+ | 10 | +-------+ 1 row in set (0.08 sec) +-------+ | @loop | +-------+ | 11 | +-------+ 1 row in set (0.09 sec) Query OK, 0 rows affected (0.10 sec)
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