如何刪除Mysql中的唯一約束？

Question

我的代碼

alter table mytable drop unique constraint uk_mytable; 

，但顯示了以下錯誤...

"You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'unique constraint username' at line 1" 

Answer 1

試試這個

alter table mytable drop uk_mytable;