drop unique key from column mysql code example

Example 1: mysql remove unique constraint

ALTER TABLE tbl_name DROP INDEX index_name

Example 2: how to remove unique key in mysql

ALTER TABLE mytable DROP INDEX key_Name;

Example 3: how to remove unique key constraint in mysql

DROP INDEX index_name ON tbl_name

Example 4: how to remove unique key in mysql

ALTER TABLE tbl_quiz_attempt_master
  DROP INDEX `PRIMARY`;