mysql sql 修改表名 建立外键 修改列名 删除列

--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;