显示版本: select version();
显示字符集: select @@character_set_database;
显示数据库: show databases;
显示表名: show tables;
显示字段: show columns from table_name;
显示计算机名: select @@hostname;
系统版本: select @@version_compile_os;
mysql路径: select @@basedir;
数据库路径: select @@datadir;
describe describe table_name;
显示root密码: select User,Password from mysql.user;
导入文件: select load_fie(0x633A5C5C77696E646F77735C73797374656D33325C5C696E65747372765C5C6D657461626173652E786D6C);
导出文件: select 'testtest' into outfile '/var/www/html/test.txt' from mysql.user;
开启外连: GRANT ALL PRIVILEGES ON *.* TO 'root'@'%' IDENTIFIED BY 'root' WITH GRANT OPTION;
mysql安装路径: show variables;
更新数据库: UPDATE `DX15`.`dx15_common_member` SET `uid` = '1' WHERE `dx15_common_member`.`uid` =40407;更新40407uid变成uid1
mysql更改root密码: mysqladmin -u root password "newpwd";
查询表: select concat(User,0x3a,Password) from mysql.user;
获取数据库所有表: SHOW TABLES FROM `databases`;
获取列前20行: SELECT * FROM `admin_bbs` ORDER BY 1 DESC LIMIT 0,20;
获取表行数: SELECT COUNT(*) AS CNT FROM `dede_admin`;
更新mysql root密码
update user set authentication_string=PASSWORD('123456') where user='root';
flush privileges;