Question

I have a table in mysql called advertisements, in which there is an entity called position , now while creating the table i have defined the position entity as unique so that i don’t get the duplicated entry into the table, now i want to remove that Unique attribute from the table entity Position in the table advertisement.

what is the mysql syntax for this?

CREATE TABLE `advertisements` (
`id` int(11) NOT NULL auto_increment,
`pos` smallint NOT NULL UNIQUE,
PRIMARY KEY (`id`)
);

Above is the Code, can someone please make a syntax for me drop that Unique Attribute attached to the pos entity.

Answer 1

Your unique index have some name, use:

 ALTER TABLE `advertisements` DROP INDEX `index_name_on_position`  

Use:

 SHOW INDEXES IN advertisements

To obtain its name.