–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;
如果有外键依赖，则需要先删掉外键
先show create table table_name
找到外键的key值
然后再执行：
alter table table_name drop foreign key key_name;
