SQL 语句积累
--重命名表
rename table t_softwareport to software_port;
--建立外键
alter table software_port add constraint fk_software_port_softwareprocessid foreign key (softwareprocessid) references software_process (id) on delete restrict on update restrict;
--删除列
alter table software_type drop column upid, drop column orderid;
--修改列名
alter table software_process change software_id softwareid int(11) not null;
--更改列编码
alter table cms_contentbody modify column offical_site_name varchar(30) character set utf8 collate utf8_unicode_ci not null;
--增加列
alter table cms_flash add name varchar(30) not null unique;
