Question

所以我有以下查询：

CREATE TRIGGER `before_delete`
    BEFORE DELETE ON `abc` FOR EACH ROW
    BEGIN
        DELETE FROM def WHERE OLD.id = objID1 OR OLD.id = objID2;
        DELETE FROM ghi WHERE OLD.id = objID;
    END;

但是mysql抱怨第1行'END'附近有语法错误....

我做错了什么？

Answer 1

您需要使用DELIMTIER技巧在过程块中包含多个语句。否则，它无法区分您的过程结束与其中的语句结束之间的区别。在documentation页面上，有一个使用delimiter关键字的示例。

为了省去去那个页面并环顾四周的麻烦，我想这会解决它：

DELIMITER $$
CREATE TRIGGER `before_delete`
BEFORE DELETE ON `abc` FOR EACH ROW
BEGIN
    DELETE FROM def WHERE OLD.id = objID1 OR OLD.id = objID2;
    DELETE FROM ghi WHERE OLD.id = objID;
END $$
DELIMITER ;

mysql触发器查询语法错误

1 个答案: