MySQL触发器 Update触发Insert失败_Mysql

MySQL触发器 Update触发Insert失败

2020-06-16 15:39magic_forever Mysql

这篇文章主要介绍了MySQL触发器 Update触发Insert失败的相关资料,非常不错，具有参考借鉴价值，需要的朋友可以参考下

今天工作需要，想要实现将仅对状态更新的表进行历史记录显示，于是考虑在原表中建立触发器，将更新的内容同时写入另一张表

于是进行测试

				?

									--建立测试表CREATE TABLE `triggletest_triggle` (

									`id` INT(11) NOT NULL,

									`name` VARCHAR(5) NULL DEFAULT NULL,

									PRIMARY KEY (`id`)

									)

									COLLATE='latin1_swedish_ci'

									ENGINE=InnoDB 

									--建立目标表

									CREATE TABLE `triggletest` (

									`seq` INT(11) NOT NULL,

									`id` INT(11) NOT NULL,

									`name` VARCHAR(5) NULL DEFAULT NULL,

									PRIMARY KEY (`seq`),

									INDEX `id` (`id`)

									)

									COLLATE='latin1_swedish_ci'

									ENGINE=InnoDB; 

									---写入测试数据

									INSERT INTO `triggletest_triggle` VALUES(1,'A'); 

									--建立触发器

									DROP TRIGGER if EXISTS test1

									CREATE TRIGGER test1 

									AFTER UPDATE ON triggletest_triggle

									FOR EACH ROW

									BEGIN

									INSERT INTO triggletest(id) values (new.id);

									END

执行触发器语句，报错，报错内容如下：

				?

									/* SQL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 'CREATE TRIGGER test1 

									AFTER UPDATE ON triggletest_triggle

									FOR EACH ROW

									BEGIN ' at line 2 */

									---最终实现代码

									DROP TRIGGER if EXISTS test1;

									CREATE TRIGGER test1 AFTER UPDATE ON test.triggletest_triggle FOR EACH ROW

									BEGIN

									INSERT INTO triggletest(id,name) values (new.id,new.name);

									END;