mysql 添加字段、删除字段、调整字段顺序 [转]

ALTER TABLE — 更改表属性 添加字段： alter table `user_movement_log` Add column GatewayId int not null default 0 AFTER `Regionid` (在哪个字段后面添加) 删除字段： alter table `user_movement_log` drop column Gatewayid 调整字段顺序： ALTER TABLE `user_movement_log` CHANGE `GatewayId` `GatewayId` int not null default 0 AFTER RegionID mysql alter 语句用法,添加、修改、删除字段等 //主键549830479 alter table tabelname add new_field_id int(5) unsigned default 0 not null auto_increment ,add primary key (new_field_id); //增加一个新列549830479 alter table t2 add d timestamp; alter table infos add ex tinyint not null default '0'; //删除列549830479 alter table t2 drop column c; //重命名列549830479 alter table t1 change a b integer; //改变列的类型549830479 alter table t1 change b b bigint not null; alter table infos change list list tinyint not null default '0'; //重命名表549830479 alter table t1 rename t2; 加索引549830479 mysql> alter table tablename change depno depno int(5) not null; mysql> alter table tablename add index 索引名 (字段名1[，字段名2 …]); mysql> alter table tablename add index emp_name (name); 加主关键字的索引549830479 mysql> alter table tablename add primary key(id); 加唯一限制条件的索引549830479 mysql> alter table tablename add unique emp_name2(cardnumber); 删除某个索引549830479 mysql>alter table tablename drop index emp_name; 修改表：549830479 增加字段：549830479 mysql> ALTER TABLE table_name ADD field_name field_type; 修改原字段名称及类型：549830479 mysql> ALTER TABLE table_name CHANGE old_field_name new_field_name field_type; 删除字段：549830479 mysql> ALTER TABLE table_name DROP field_name;

 

 

 

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