1
alter table mytable drop unique constraint uk_mytable;
하지만 다음과 같은 오류를 보여줍니다 코드 ...
"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"
http://stackoverflow.com/questions/3487691/dropping-unique- 시도 constraint-from-mysql-table – Damodaran