标签：varchar ble table class span password add lte hang
create table table_user( id int(3), name varchar(8), password varchar(20));#创建一个表，有3个字段 alter table table_user rename to tab_user;#更改表名 alter table tab_user add email varchar(255) not null;#添加一个字段，字段非空 alter table tab_user change id newid int(3);#修改字段名 alter table tab_user drop email;#删除一个自段 drop table tab_user;删除表
标签：varchar ble table class span password add lte hang
原文地址：http://www.cnblogs.com/imageSet/p/7629819.html
