mysql update 修改数据库内容
发表于|更新于|mysql
update lottery set voucher =’60000’;
文章作者: developer
版权声明: 本博客所有文章除特别声明外,均采用 CC BY-NC-SA 4.0 许可协议。转载请注明来源 Dev!
相关推荐
2020-06-10
mysql laragon 启动 报错
更换laragon的mysql版本后突然出现如下错误 1Fatal error: Can't open and lock privilege tables: Table 'mysql.host' doesn't exist 解决方法将下载的mysql5.5目录里自带的data文件夹复制到laragon的data文件夹里
2020-04-13
mysql 管理
创建数据库1CREATE DATABASE IF NOT EXISTS yourdbname DEFAULT CHARSET utf8mb4 COLLATE utf8mb4_general_ci; 创建用户1create user 'user'@'%' identified by '123'; 授权用户1grant all privileges on db.* to 'user'@'%'; 查看用户1show grants for 'user'@'%'; 修改密码123use mysql; update user set password=password('123') where user='root' and host='localhost'; flush privileges; mysql8密码问题1ALTER USER 'native'@&...
2018-01-08
mysql cpu过高的问题检查
找到配置文件 1sudo find / -name my.cnf 进入mysql执行show processlist;反复执行就可以看到当前进程,反复出现的语句就是因为速度太慢才出现的 参考数据http://www.jb51.net/article/30495.htmhttps://segmentfault.com/q/1010000001735963
2019-03-19
mysql 统计重复记录数量
123456SELECT COUNT(*) as total FROM ( SELECT count(openid) as t FROM user GROUP BY `openid` HAVING t > 1 limit 1000) as a 如果下面写法会很慢 123456SELECT COUNT(*) as total FROM form_user WHERE id IN( SELECT count(id) FROM form_user GROUP BY `openid` HAVING COUNT(openid) > 1 limit 1000)
2016-07-30
mysql 找出重复数据
1SELECT * , count(openid) as count FROM `cul_logindata` GROUP BY `openid` HAVING count>1
2018-05-31
mysql 授权 用户 权限
命令1GRANT ALL PRIVILEGES ON *.* TO 'root'@'%' IDENTIFIED BY 'root' WITH GRANT OPTION; 其中‘root‘@’%’ 是 用户名@登录ip%通配符表示全部 IDENTIFIED BY 后跟的是密码 然后 1FLUSH PRIVILEGES; 参考文献https://www.cnblogs.com/bethal/p/5512755.html https://blog.csdn.net/qq_24531461/article/details/77980729
公告
This is my Blog