mysql SQL语句积累参考

--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 restrict on 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 var30) character set utf8 collate utf8_unicode_ci not null;

--增加列

alter table cms_flash add name var30) not null unique;