Question

我正在使用带有MySQL版本的WampServer：5.7.9和phpMyAdmmin版本：4.5.2

如果Table2中不存在数据，我正在尝试在Table1上编写一个插入后触发器以在Table2中插入数据。以下是我的询问：

DROP TRIGGER IF EXISTS `insert_customer`;
CREATE TRIGGER `insert_customer` AFTER INSERT ON `installations`
FOR EACH ROW BEGIN
    IF (SELECT COUNT(*) FROM `customers` WHERE `customers`.`phone` = NEW.`phone`) = 0
    THEN INSERT INTO `customers` (`phone`, `imei`, `platform`, `version_code`) VALUES (NEW.`phone`, NEW.`imei`, NEW.`platform`, NEW.`version_code`);
    END IF;
END;

这给了我以下错误：

#1064 - You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '' at line 4

我也尝试过分隔符：

DROP TRIGGER IF EXISTS `insert_customer`;
DELIMITER |
CREATE TRIGGER `insert_customer` AFTER INSERT ON `installations`
FOR EACH ROW BEGIN
    IF (SELECT COUNT(*) FROM `customers` WHERE `customers`.`phone` = NEW.`phone`) = 0
    THEN INSERT INTO `customers` (`phone`, `imei`, `platform`, `version_code`) VALUES (NEW.`phone`, NEW.`imei`, NEW.`platform`, NEW.`version_code`)
    END IF;
END;
|
DELIMITER ;

这给了我以下错误：

#1064 - You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'END IF;
END' at line 5

我在这里做错了什么？有什么帮助吗？

Answer 1

我的猜测是额外的分隔符;尝试改变

END;
|

到

END|

Answer 2

最后我得到了它。正确的SQL是：

DROP TRIGGER IF EXISTS `insert_customer`;
DELIMITER |
CREATE TRIGGER `insert_customer` AFTER INSERT ON `installations`
FOR EACH ROW BEGIN
    IF (SELECT COUNT(*) FROM `customers` WHERE `customers`.`phone` = NEW.`phone`) = 0 THEN
        INSERT INTO `customers` (`phone`, `imei`, `platform`, `version_code`) VALUES (NEW.`phone`, NEW.`imei`, NEW.`platform`, NEW.`version_code`);
    END IF;
END;|
DELIMITER ;

;在我的INSERT查询结束时解决了我的问题。：d

如果条件匹配插入触发器后，MySQL插入查询

2 个答案: