Question

我曾尝试在Adminer上制作MYSQL触发器，但它不起作用。这是我的代码：

    CREATE TRIGGER handle100kRows BEFORE INSERT ON `4013834123456`
FOR EACH ROW
BEGIN

    IF (SELECT COUNT(*) FROM `4013834123456`) = "100000" THEN BEGIN
        DELETE FROM 4013834123456 ORDER BY id LIMIT 1
    END
    END IF

END;

出现以下错误：（1064）:( 1064）：语法错误接近＆＃39; 4013834123456 ORDER BY id LIMIT 1 END END IF END＆＃39;在第6行

我刚尝试过;在END＆＃39;但然后出现更多错误...... 我使用Adminer 4.1.0 MySQL数据库！求救！

UPDATE，现在可以使用分隔符：

delimiter |
CREATE TRIGGER handle100kRows BEFORE INSERT ON `4013834123456`
FOR EACH ROW
BEGIN
    IF (SELECT COUNT(*) FROM `4013834123456`) = "100000" THEN
        DELETE FROM `4013834123456` ORDER BY id LIMIT 1;
    END IF;
END;
delimiter;

Answer 1

您忘记了使用反引号转义表名4013834123456。

你也有end太多了。

delimiter |
CREATE TRIGGER handle100kRows BEFORE INSERT ON `4013834123456`
FOR EACH ROW
BEGIN
    IF (SELECT COUNT(*) FROM `4013834123456`) = "100000" THEN
        DELETE FROM `4013834123456` ORDER BY id LIMIT 1;
    END IF;
END
|
delimiter ;

在插入之前创建Mysql触发器

1 个答案: