mysql 常用操作(错误)
1、mysql 5.7 关于group by 错误:
(1)临时性设置:重启后错误还是存在
select @@global.sql_mode;
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';
(2)找到my.cnf文件,添加到最后,重启mysql服务 service mysql restart
[mysqld]
sql_mode=STRICT_TRANS_TABLES,NO_ZERO_IN_DATE,NO_ZERO_DATE,ERROR_FOR_DIVISION_BY_ZERO,NO_AUTO_CREATE_USER,NO_ENGINE_SUBSTITUTION
2、mysql 新增多条其他表查询数据:
INSERT INTO sys_role_auth (role_id,auth_id)(SELECT 1,auth_id from sys_auth);
3、nginx解决图片跨域访问问题:
img访问配置中新增:
add_header Access-Control-Allow-Origin *;
add_header Access-Control-Allow-Headers X-Requested-With;
add_header Access-Control-Allow-Methods GET,POST,OPTIONS;
4、更改表字段编码
ALTER TABLE life_goods CONVERT TO CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci;
5、更新字段为另一张表字段
UPDATE life_purchase,life_goods SET life_purchase.price = life_goods.dis_price WHERE life_purchase.goods_id = life_goods.goods_id AND life_purchase.period = 20200604
6、navicat查看所有进程:show processlist; 杀死等待的或卡死的进程: kill PID;(有些守护进程杀不死,请使用kill -9 PID)