How to drop unique key or index from a table ?

[santhanalakshmi]

Hi,

By mistakenly,i added three UNIQUE index on a single column.Out of three,i removed one UNIQUE index from a table.Now,i want to remove remaining unique index from a table.

     mysql> show index from uniqueindex;
+-------------+------------+----------+--------------+-------------+-----------+
-------------+----------+--------+------+------------+---------+
| Table       | Non_unique | Key_name | Seq_in_index | Column_name | Collation |
 Cardinality | Sub_part | Packed | Null | Index_type | Comment |
+-------------+------------+----------+--------------+-------------+-----------+
-------------+----------+--------+------+------------+---------+
| uniqueindex |          0 | id_2     |            1 | id          | A         |
           3 |     NULL | NULL   |      | BTREE      |         |
| uniqueindex |          0 | id_3     |            1 | id          | A         |
           3 |     NULL | NULL   |      | BTREE      |         |
+-------------+------------+----------+--------------+-------------+-----------+
-------------+----------+--------+------+------------+---------+
2 rows in set (0.00 sec)

Now, I want to remove this unique key as shown above...

Next,i am running this query.....why it shows me as a PRIMARY KEY in the key field ?

mysql> desc uniqueindex;
+---------------+-------------+------+-----+---------+-------+
| Field         | Type        | Null | Key | Default | Extra |
+---------------+-------------+------+-----+---------+-------+
| id            | int(11)     | NO   | PRI | 0       |       |
| name          | varchar(50) | YES  |     |         |       |
| place         | varchar(50) | YES  |     | NULL    |       |
| qualification | varchar(50) | YES  |     | NULL    |       |
+---------------+-------------+------+-----+---------+-------+
4 rows in set (0.01 sec)

Thanks in advance

[Banfa]

Can't you use

DROP INDEX index_name ON tbl_name

?

The key field is showing keys you have set up on the table, so id is the primary key of the table uniqueindex.