MySQL5.7新特性小试
2020-02-12 00:48
351 查看
新建数据库表
CREATE TABLE `table_md5` (
`id` int(10) unsigned NOT NULL AUTO_INCREMENT,
`param_value` char(15) NOT NULL,
`md5_value` varchar(35) GENERATED ALWAYS AS (md5(`param_value`)) VIRTUAL,
PRIMARY KEY (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=3 DEFAULT CHARSET=utf8;
[/code]
2.插入记录
insert into table_md5(id,param_value) values(1,"123456");
insert into table_md5(id,param_value) values(2,"123456");
[/code]
3.查看数据
+----+-------------+----------------------------------+
| id | param_value | md5_value |
+----+-------------+----------------------------------+
| 1 | 123456 | e10adc3949ba59abbe56e057f20f883e |
| 2 | 123456 | e10adc3949ba59abbe56e057f20f883e |
+----+-------------+----------------------------------+
[/code]
4.更新数据
update table_md5 set param_value='123' where id=2;
[/code]
5.查看数据
+----+-------------+----------------------------------+
| id | param_value | md5_value |
+----+-------------+----------------------------------+
| 1 | 123456 | e10adc3949ba59abbe56e057f20f883e |
| 2 | 123 | 202cb962ac59075b964b07152d234b70 |
+----+-------------+----------------------------------+
[/code]
这样会不会对MySQL数据库性能有很大影响。。。
转载于:https://my.oschina.net/tdd/blog/666010
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