mysql常用操作

查看都有哪些庫    > show databases;

查看某個庫的表    > use db; show tables;

查看錶的字段     > desc tb;

查看建表語句     > show create table tb;

當前是哪個用戶     > select user();

查看當前庫     > select database();

創建庫     > create database db1;

創建表    > create table t1 (`id` int(4), `name` char(40));

插入數據     > insert into tb1 (id,name) values(1,'aaaa');

查看數據庫版本     > select version();

查看mysql狀態     > show status;

修改mysql參數 

     > show variables like 'max_connect%';

     > set global max_connect_errors = 1000;

查看mysql隊列     > show processlist;

創建普通用戶並授權

> grant all on *.* to user1 identified by '123456'; 

> grant all on db1.* to 'user2'@'10.0.2.100' identified by '111222'; 

> grant all on db1.* to 'user3'@'%' identified by '231222';

更改密碼     > UPDATE mysql.user SET password=PASSWORD("newpwd") WHERE user='username' ;

查詢

    > select count(*) from mysql.user; 

    > select * from mysql.db; select * from mysql.db where host like '10.0.%';

插入     > update db1.t1 set name='aaa' where id=1;

清空表     > truncate table db1.t1;

刪除表     > drop table db1.t1;

刪除數據庫     > drop database db1;

mysql備份與恢復

mysqldump -uroot -p db >1.sql

mysql -uroot -p db <1.sql

備份時指定字符集

mysqldump -uroot -p --default-character-set=utf8 db >1.sql

mysql -uroot -p --default-character-set=utf8 db < 1.sql