mirror of https://github.com/dunwu/db-tutorial.git
59 lines
1.7 KiB
SQL
59 lines
1.7 KiB
SQL
/**
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* Mysql 触发器（TRIGGER）创建、使用示例
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* @author Zhang Peng
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* @date 2018/5/2
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*/
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#############################################################
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# 运行本例的预置操作
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#############################################################
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-- 新建数据表 user
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DROP TABLE IF EXISTS user;
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CREATE TABLE user (
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id int(10) unsigned NOT NULL AUTO_INCREMENT COMMENT 'Id',
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username varchar(64) NOT NULL DEFAULT 'default' COMMENT '用户名',
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password varchar(64) NOT NULL DEFAULT 'default' COMMENT '密码',
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email varchar(64) NOT NULL DEFAULT 'default' COMMENT '邮箱',
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PRIMARY KEY (id)
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) COMMENT='用户表';
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-- 新建数据表 user_history
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DROP TABLE IF EXISTS user_history;
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CREATE TABLE user_history (
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id INT(10) UNSIGNED NOT NULL AUTO_INCREMENT COMMENT 'ID',
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user_id INT(10) UNSIGNED NOT NULL DEFAULT 0 COMMENT '用户ID',
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operate_type VARCHAR(64) NOT NULL DEFAULT 'default' COMMENT '操作类型',
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operate_time VARCHAR(64) NOT NULL DEFAULT 'default' COMMENT '操作时间',
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PRIMARY KEY (id)
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) COMMENT='用户记录表';
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#############################################################
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# 创建触发器
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#############################################################
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-- 删除触发器
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DROP TRIGGER IF EXISTS trigger_insert_user;
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-- 创建触发器
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DELIMITER $
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CREATE TRIGGER trigger_insert_user
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AFTER INSERT ON user
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FOR EACH ROW
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BEGIN
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INSERT INTO user_history(user_id, operate_type, operate_time)
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VALUES (NEW.id, 'add a user', now());
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END $
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DELIMITER ;
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-- 查看触发器
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SHOW TRIGGERS;
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#############################################################
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# 测试
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#############################################################
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INSERT INTO user(username, password, email)
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VALUES ('admin', 'admin', 'xxxx@163.com');
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SELECT * FROM user_history;
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