# MySQL 刪除 unique key

CREATE TABLE `good_booked` (
  `auto_id` int(10) NOT NULL auto_increment,
  `good_id` int(11) default NULL,
  `chemist_id` int(11) default NULL,
  PRIMARY KEY  (`auto_id`),
  UNIQUE KEY `good_id` (`good_id`,`chemist_id`),
  KEY `current_state` (`current_state`),
  KEY `send_time` (`send_time`)
)

想删除某个表中某个字段的unique key：

ALTER TABLE good_booked DROP INDEX good_id;

###### tags: `MySQL`