[PHPMYADMIN] 报错#1193 - UNKNOWN SYSTEM VARIABLE ‘LC_MESSAGES‘ 登录到phpmyadmin后提示错误: `SQL query:SET lc_messages = 'en_US';MySQL said: Documentation1193 - Unknown system variable 'lc_messages'`版本适配问题 `For mySQL 5.5, use phpMyAdmin 4.4.x and aboveFor mySQL 5.1, use phpMyAdmin 4.0.xHope this helps someone.`

宝塔面板登录 phpMyAdmin 提示服务器和客户端上指示的HTTPS之间不匹配 如果宝塔面板安装了 phpMyAdmin，那么可以进入数据库管理页面，该页面会展示所有网站数据库的列表。我们可以点击对应数据库右侧的“管理”选项，或者可以点击上部的“phpMyAdmin”选项，这样就可以自动进入 phpMyAdmin 管理页面。宝塔面板登录 phpMyAdmin 提示服务器和客户端上指示的HTTPS之间不匹配正常情况下，可以直接进入 phpMyAdmin 页面。宝塔面板登录 phpMyAdmin 提示服务器和客户端上指示的HTTPS之间不匹配如果无法成功登录 phpMyAdmin 页面，并且出现如下错误提示：服务器和客户端上指示的HTTPS之间不匹配。这可能导致phpMyAdmin无法正常工作或存在安全风险。请修复您的服务器配置以正确指示HTTPS。宝塔面板登录 phpMyAdmin 提示服务器和客户端上指示的HTTPS之间不匹配这种情况应该如何处理呢？解决方案第一步：如果宝塔面板未开启“面板SSL”，可以先开启面板 SSL，然后会申请自签名证书。宝塔面板登录 phpMyAdmin 提示服务器和客户端上指示的HTTPS之间不匹配第二步：进入宝塔面板的软件商店页面，找到 phpMyAdmin，然后点击进入设置页面。宝塔面板登录 phpMyAdmin 提示服务器和客户端上指示的HTTPS之间不匹配第三步：进入 phpMyAdmin 管理页面后，点击进入安全设置页面。点击开启 SSL，然后点击旁边的保存按钮。宝塔面板登录 phpMyAdmin 提示服务器和客户端上指示的HTTPS之间不匹配经过上面的设置，再次访问 phpMyAdmin 的时候，就可以正常登陆和访问了。

内连接，左连接，右连接作用及区别 内连接就是普通的查询，例如1.加inner join的：SELECT S.SName,C.CourseID,C.GradeFrom Sc AS CINNER JOIN Students AS SONC.StudentID = S.SNo2.不加inner join的SELECT Students.SName, Sc.CourseID, Sc.GradeFROMStudents,ScWHEREStudents.SNo = Sc.StudentID外连接与普通连接的区别：普通连接只输出满足连接条件的元组，外连接操作以指定表为连接主题，将主体表中不满足连接条件的元组一并输出。外连接又分为左连接和右连接：左连接：SELECT S.SName,C.CourseID,C.Grade From Students AS S INNER JOIN Sc AS C ON C.StudentID <> S.SNo SELECT S.SName,C.CourseID,C.Grade From Sc AS C LEFT JOIN Students AS S ON C.StudentID = S.SNo //左连接就是以from左边为主，拿上面两个例子来说，第一种是以学生（students）为主，假如学生成绩为空，也能查询到学生信息，只不过成绩为空。而第二种则是以成绩为主（sc）所以先查学生成绩，如果成绩为空就算学生存在，也查不到记录。右连接：SELECT Titles.Title_id, Titles.Title, Publishers.Pub_name FROM titles RIGHT OUTER JOIN Publishers ON Titles.Pub_id = Publishers.Pub_id 右连接就是以from右边为主，与左连接类似。————————————————版权声明：本文为CSDN博主「一生所Ai」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/qq_40180411/article/details/81431209

时间筛选 MySQL中获取天、周、月等数据1.今天select * from 表名 where to_days(时间字段名) = to_days(now());2.昨天SELECT * FROM 表名 WHERE TO_DAYS( NOW( ) ) - TO_DAYS( 时间字段名) <= 13.近7天SELECT * FROM 表名 where DATE_SUB(CURDATE(), INTERVAL 7 DAY) <= date(时间字段名)4.近30天SELECT * FROM 表名 where DATE_SUB(CURDATE(), INTERVAL 30 DAY) <= date(时间字段名)5.本月SELECT * FROM 表名 WHERE DATE_FORMAT( 时间字段名, '%Y%m' ) = DATE_FORMAT( CURDATE( ) , '%Y%m' )6.上一月SELECT * FROM 表名 WHERE PERIOD_DIFF( date_format( now( ) , '%Y%m' ) , date_format( 时间字段名, '%Y%m' ) ) =17.查询本季度数据select * from ht_invoice_information where QUARTER(create_date)=QUARTER(now());8.查询上季度数据select * from ht_invoice_information where QUARTER(create_date)=QUARTER(DATE_SUB(now(),interval 1 QUARTER));9.查询本年数据select * from ht_invoice_information where YEAR(create_date)=YEAR(NOW());10.查询上年数据select * from ht_invoice_information where year(create_date)=year(date_sub(now(),interval 1 year));11.查询当前这周的数据SELECT name,submittime FROM enterprise WHERE YEARWEEK(date_format(submittime,'%Y-%m-%d')) = YEARWEEK(now());查询本周所有的数据(本周第一天是周一)SELECT * FROM task WHERE YEARWEEK(date_format(时间字段,'%Y-%m-%d'),1) = YEARWEEK(now(),1);查询本周所有的数据(本周第一天是周日)SELECT * FROM task WHERE YEARWEEK(date_format(时间字段,'%Y-%m-%d')) = YEARWEEK(now());12.查询上周的数据SELECT name,submittime FROM enterprise WHERE YEARWEEK(date_format(submittime,'%Y-%m-%d')) = YEARWEEK(now())-1;13.查询上个月的数据select name,submittime from enterprise where date_format(submittime,'%Y-%m')=date_format(DATE_SUB(curdate(), INTERVAL 1 MONTH),'%Y-%m')select * from user where DATE_FORMAT(pudate,'%Y%m') = DATE_FORMAT(CURDATE(),'%Y%m') ;select * from user where WEEKOFYEAR(FROM_UNIXTIME(pudate,'%y-%m-%d')) = WEEKOFYEAR(now())select * from user where MONTH(FROM_UNIXTIME(pudate,'%y-%m-%d')) = MONTH(now())select * from user where YEAR(FROM_UNIXTIME(pudate,'%y-%m-%d')) = YEAR(now()) and MONTH(FROM_UNIXTIME(pudate,'%y-%m-%d')) = MONTH(now())select * from user where pudate between 上月最后一天 and 下月第一天14.查询当前月份的数据select name,submittime from enterprise where date_format(submittime,'%Y-%m')=date_format(now(),'%Y-%m')15.查询距离当前现在6个月的数据select name,submittime from enterprise where submittime between date_sub(now(),interval 6 month) and now();select curdate(); --获取当前日期select last_day(curdate()); --获取当月最后一天。select DATE_ADD(curdate(),interval -day(curdate())+1 day); --获取本月第一天select date_add(curdate()-day(curdate())+1,interval 1 month); -- 获取下个月的第一天select DATEDIFF(date_add(curdate()-day(curdate())+1,interval 1 month ),DATE_ADD(curdate(),interval -day(curdate())+1 day)) from dual; --获取当前月的天数

mysql 设置外网可访问 授权用户,你想root使用密码从任何主机连接到mysql服务器 {dotted startColor="#ff6c6c" endColor="#1989fa"/}GRANT ALL PRIVILEGES ON . TO 'root'@'%' IDENTIFIED BY 'admin123' WITH GRANT OPTION;flush privileges;如果你想允许用户root从ip为192.168.1.104的主机连接到mysql服务器GRANT ALL PRIVILEGES ON . TO 'myuser'@'192.168.1.104' IDENTIFIED BY 'admin123' WITH GRANT OPTION;flush privileges;{lamp/}