MySQL常用SQL整理
添加字段
alter table `user` add `is_super` tinyint(1) unsigned not null default '0' after `is_sys` ;
alter table `article` add `url` varchar(200) not null default '' after `source` ;
修改字段名称及类型
alter table `article` change `isshow` `is_show` tinyint(1) unsigned not null default '0' ;
修改字段类型
alter table `article` modify `title` varchar(200) not null default '' ;
删除字段
alter table `article` drop column isshow,drop column gid,drop column pid ;
删表
drop table `user` ;
清空表
truncate table `user` ;
创建表
CREATE TABLE `uc_user` (
`id` bigint(20) NOT NULL AUTO_INCREMENT,
`citycode` varchar(20) NOT NULL DEFAULT '' COMMENT '城市',
`username` varchar(100) NOT NULL DEFAULT '',
`password` char(32) NOT NULL DEFAULT '',
`status` tinyint(1) unsigned NOT NULL DEFAULT '0',
`nickname` varchar(100) NOT NULL DEFAULT '',
`wcaid` varchar(20) NOT NULL DEFAULT '',
`lastlogintime` bigint(10) unsigned NOT NULL DEFAULT '0',
`lastloginip` varchar(20) NOT NULL DEFAULT '',
`createtime` bigint(10) unsigned NOT NULL DEFAULT '0',
`updatetime` bigint(10) unsigned NOT NULL DEFAULT '0',
PRIMARY KEY (`id`),
UNIQUE KEY `uni_username` (`username`) USING BTREE,
UNIQUE KEY `uni_citycode_wcaid` (`citycode`,`wcaid`) USING BTREE,
KEY `idx_username_password_status` (`username`,`password`,`status`),
KEY `status` (`status`)
) ENGINE=MyISAM AUTO_INCREMENT=1001 DEFAULT CHARSET=utf8 COMMENT='用户表' ;
CREATE TABLE `adslots` (
`id` varchar(50) NOT NULL,
`alias` varchar(50) NOT NULL,
`name` varchar(100) NOT NULL,
`description` varchar(1000) NOT NULL,
`price` bigint(20) NOT NULL,
`width` bigint(20) NOT NULL,
`height` bigint(20) NOT NULL,
`num_slots` bigint(20) NOT NULL,
`num_auto_fill` bigint(20) NOT NULL,
`auto_fill` text NOT NULL,
`created_at` bigint(20) NOT NULL,
`updated_at` bigint(20) NOT NULL,
`version` bigint(20) NOT NULL,
PRIMARY KEY (`id`),
UNIQUE KEY `uni_adslot_alias` (`alias`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 ;
插入
insert into user (username,status) value ('u1',1) ;
批量插入
insert into user (username,status) values ('u1',1),('u2',1),('u3',1) ;