How to remove unique key from mysql table

Question

I need to remove a unique key from my mysql table. How can remove that using mysql query.

I tried this but it is not working

alter table tbl_quiz_attempt         


        

Answer 1

For those who don't know how to get index_name which mentioned in Devart's answer, or key_name which mentioned in Uday Sawant's answer, you can get it like this:

SHOW INDEX FROM table_name;

This will show all indexes for the given table, then you can pick name of the index or unique key that you want to remove.