MySQL timespan设置 sql_mode设置

Timespan设置:

在MySQL5.7版本中创建表

CREATE TABLE `investor_seat` (
  `id` int(11) NOT NULL AUTO_INCREMENT ,
  `investorId` int(11) NOT NULL  COMMENT '投资人id',
  `seatId` int(11) NOT NULL  COMMENT '席位id',
  `maybe` float NOT NULL COMMENT '席位归属某帮派或者某人的概率',
  `investorName` varchar(28) NOT NULL COMMENT '投资人名含机构',
  `seatName` varchar(108) NOT NULL COMMENT '席位名',
  `status` TINYINT NOT NULL DEFAULT 0 COMMENT '投资人席位状态',
  `addTime` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP,
  `updateTime` timestamp NOT NULL ON UPDATE CURRENT_TIMESTAMP,
  PRIMARY KEY (`id`)
) ENGINE = InnoDB AUTO_INCREMENT = 1 CHARSET = utf8;

注意updateTime字段,会在创建的时候报错:

[Err] 1067 - Invalid default value for 'updateTime'

修改:

`updateTime` timestamp NOT NULL default CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,

 

Sql_mode设置:

从当前环境变量查看MySQL的sql_mode配置:

mysql> show variables like 'sql_mode';
+---------------+-------------------------------------------------------------------------------------------------------------------------------------------+
| Variable_name | Value
                                    |
+---------------+-------------------------------------------------------------------------------------------------------------------------------------------+
| sql_mode      | ONLY_FULL_GROUP_BY,STRICT_TRANS_TABLES,NO_ZERO_IN_DATE,NO_ZERO_DATE,ERROR_FOR_DIVISION_BY_ZERO,NO_AUTO_CREATE_USER,NO_ENGINE_SUBSTITUTION |
+---------------+-------------------------------------------------------------------------------------------------------------------------------------------+
1 row in set, 1 warning (0.00 sec)

从当前连接会话查看sql_mode:

select @@session.sql_mode;

查看全局的sql_mode:

select @@global.sql_mode;

临时修改sql_mode:

set session sql_mode='STRICT_TRANS_TABLES,NO_ENGINE_SUBSTITUTION';

永久修改:

将mysql安装文件里面的my.ini(windows)//etc/my.cnf(Linux)里面添加设置:

sql_mode=ONLY_FULL_GROUP_BY,STRICT_TRANS_TABLES,ERROR_FOR_DIVISION_BY_ZERO,NO_AUTO_CREATE_USER,NO_ENGINE_SUBSTITUTION

 或者

sql_mode=STRICT_TRANS_TABLES,NO_ENGINE_SUBSTITUTION 

 

在这里自己遇到一个大坑:

安装Mysql的时候配置文件命名为my-default.ini,结果设置sql_mode,重启服务,甚至重启电脑都无效,将my-default.ini改成my.ini再重启服务就OK了!

==============================================

具体出错提示:

[Err] 1055 - Expression #1 of ORDER BY clause is not in GROUP BY clause and contains nonaggregated column 'information_schema.PROFILING.SEQ' which is not functionally dependent on columns in GROUP BY clause; this is incompatible with sql_mode=only_full_group_by

 

下载安装的是最新版的mysql5.7.x版本,默认是开启了 only_full_group_by 模式的,但开启这个模式后,原先的 group by 语句就报错,然后又把它移除了。

一旦开启 only_full_group_by ,感觉,group by 将变成和 distinct 一样,只能获取受到其影响的字段信息,无法和其他未受其影响的字段共存,这样,group by 的功能将变得十分狭窄了

only_full_group_by 模式开启比较好。

因为在 mysql 中有一个函数: any_value(field) 允许,非分组字段的出现(和关闭 only_full_group_by 模式有相同效果)。

select @@global.sql_mode
-- 'ONLY_FULL_GROUP_BY,STRICT_TRANS_TABLES,NO_ZERO_IN_DATE,NO_ZERO_DATE,ERROR_FOR_DIVISION_BY_ZERO,NO_AUTO_CREATE_USER,NO_ENGINE_SUBSTITUTION'

去掉ONLY_FULL_GROUP_BY,重新设置值。

改变全局sql_model:

set @@global.sql_mode ='STRICT_TRANS_TABLES,NO_ZERO_IN_DATE,NO_ZERO_DATE,ERROR_FOR_DIVISION_BY_ZERO,NO_AUTO_CREATE_USER,NO_ENGINE_SUBSTITUTION';

对于已存在的数据库,则需要在对应的数据下执行:

set sql_mode ='STRICT_TRANS_TABLES,NO_ZERO_IN_DATE,NO_ZERO_DATE,ERROR_FOR_DIVISION_BY_ZERO,NO_AUTO_CREATE_USER,NO_ENGINE_SUBSTITUTION';

 

http://www.nowck.com/archives/70.html

http://blog.csdn.net/wyzxg/article/details/8787878

http://blog.sina.com.cn/s/blog_49a665e10100cb52.html

https://blog.csdn.net/jiang1245764446/article/details/72898137

posted @ 2017-07-30 01:02  hongdada  阅读(691)  评论(0编辑  收藏  举报