mysql 关闭---- ONLY_FULL_GROUP_BY

报错信息:

Caused by: com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: Expression #1 of ORDER BY clause is not in GROUP BY clause and contains

  

 

 

第一种方法:有效果(个人验证过)
bug原因:
对于GROUP BY聚合操作,如果在SELECT中的列,没有在GROUP BY中出现,那么这个SQL是不合法的,因为列不在GROUP BY从句中。简而言之,就是SELECT后面接的列必须被GROUP BY后面接的列所包含。
如:
select a,b from table group by a,b,c; (正确)
select a,b,c from table group by a,b; (错误)
这个配置会使得GROUP BY语句环境变得十分狭窄,所以一般都不加这个配置。
查看mysql是否开启了ONLY_FULL_GROUP_BY
select @@global.sql_mode
如果返回值包含 ONLY_FULL_GROUP_BY,那么说明mysql开启了ONLY_FULL_GROUP_BY。

解决方法:
去掉 返回值中的ONLY_FULL_GROUP_BY,将剩下的返回值拷贝出来,打开mysql的ini配置文件,将拷贝下来的配置追加到[mysqld]后面
sql_mode=‘STRICT_TRANS_TABLES,NO_ZERO_IN_DATE,NO_ZERO_DATE,ERROR_FOR_DIVISION_BY_ZERO,NO_ENGINE_SUBSTITUTION’

sql_mode=‘STRICT_TRANS_TABLES,NO_ZERO_IN_DATE,NO_ZERO_DATE,ERROR_FOR_DIVISION_BY_ZERO,NO_ENGINE_SUBSTITUTION’

注意要用单引号括起来。
然后重启mysql服务
特别说明:mysql停止/重启命令

win下
net stop mysql
net start mysql
————————————————
版权声明:本文为CSDN博主「非常暴躁的程序猿」的原创文章,遵循CC 4.0 BY-SA版权协议,转载请附上原文出处链接及本声明。
原文链接:https://blog.csdn.net/hello123yy/article/details/107618475

 

第二种方法无效

Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.

mysql> select version();
+-----------+
| version() |
+-----------+
| 5.7.37 |
+-----------+
1 row in set (0.00 sec)

mysql> select @@sql_mode;
+-------------------------------------------------------------------------------------------------------------------------------------------+
| @@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 (0.00 sec)

mysql> SET SESSION sql_mode=(SELECT REPLACE(@@sql_mode,'ONLY_FULL_GROUP_BY,',''));
Query OK, 0 rows affected (0.00 sec)

mysql> select @@sql_mode;
+------------------------------------------------------------------------------------------------------------------------+
| @@sql_mode |
+------------------------------------------------------------------------------------------------------------------------+
| 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 (0.00 sec)

mysql>

 

posted @ 2022-08-03 14:12  张载zz  阅读(973)  评论(0编辑  收藏  举报