![MYSQL SQL 语句修改字段默认值 MYSQL SQL 语句修改字段默认值](https://image.shishitao.com:8440/aHR0cHM6Ly9ia3FzaW1nLmlrYWZhbi5jb20vdXBsb2FkL2NoYXRncHQtcy5wbmc%2FIQ%3D%3D.png?!?w=700&webp=1)
alter table tablename alter column drop default; (若本身存在默认值,则先删除)
alter table tablename alter column set default 't5';(若本身不存在则可以直接设定)
eg:
alter table `t_member_base_ext` alter member_autograph drop default;
alter table `t_member_base_ext` alter member_autograph set default null;
- t_member_base_ext 表名
- member_autograph 表字段