How to drop unique in MySQL?

Question

Create Table: CREATE TABLE `fuinfo` (
  `fid` int(10) unsigned NOT NULL,
  `name` varchar(40) NOT NULL,
  `email` varchar(128) NOT NULL,
  UNIQUE KEY `email` (`email         


        

Answer 1

Use below query :

ALTER TABLE `table_name` DROP INDEX key_name;

If you don't know the key_name then first try below query, you can get key_name.

SHOW CREATE TABLE table_name

OR

SHOW INDEX FROM table_name;

If you want to remove/drop primary key from mysql table, Use below query for that

ALTER TABLE `products` DROP INDEX `PRIMARY`;

Code Taken from: http://chandreshrana.blogspot.in/2015/10/how-to-remove-unique-key-from-mysql.html