mysql修改删除列，删除有外键依赖的列

–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;

 

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;