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mysql建表常用sql语句个人经验分享_MySQL

May 27, 2016 pm 02:12 PM

mysql建表常用sql语句个人经验分享_MySQL

 连接:mysql -h主机地址 -u用户名 -p用户密码 (注:u与root可以不用加空格,其它也一样)
断开:exit (回车)

创建授权:grant select on 数据库.* to 用户名@登录主机 identified by /"密码/"
修改密码:mysqladmin -u用户名 -p旧密码 password 新密码
删除授权: revoke select,insert,update,delete om *.* from test2@localhost;

显示数据库:show databases;
显示数据表:show tables;
显示表结构:describe 表名;

创建库:create database 库名;
删除库:drop database 库名;
使用库(选中库):use 库名;

创建表:create table 表名 (字段设定列表);
删除表:drop table 表名;
修改表:alter table t1 rename t2
查询表:select * from 表名;
清空表:delete from 表名;
备份表: mysqlbinmysqldump -h(ip) -uroot -p(password) databasename tablename > tablename.sql
恢复表: mysqlbinmysql -h(ip) -uroot -p(password) databasename tablename < tablename.sql(操作前先把原来表删除)

增加列:ALTER TABLE t2 ADD c INT UNSIGNED NOT NULL AUTO_INCREMENT,ADD INDEX (c);
修改列:ALTER TABLE t2 MODIFY a TINYINT NOT NULL, CHANGE b c CHAR(20);
删除列:ALTER TABLE t2 DROP COLUMN c;

备份数据库:mysql/bin/mysqldump -h(ip) -uroot -p(password) databasename > database.sql
恢复数据库:mysql/bin/mysql -h(ip) -uroot -p(password) databasename < database.sql
复制数据库:mysql/bin/mysqldump --all-databases > all-databases.sql
修复数据库:mysqlcheck -A -o -uroot -p54safer

文本数据导入: load data local infile /"文件名/" into table 表名;

数据导入导出:mysql/bin/mysqlimport database tables.txtbitsCN.com    

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