DROP INDEX - MySQL

Overview

The DROP INDEX command in MySQL removes an index from a table, making it faster to delete or update data in that table, but potentially slower to retrieve data.

Syntax

DROP INDEX index_name ON table_name;

• index_name: The name of the index to be dropped.
• table_name: The name of the table from which the index will be removed.

Options/Flags

None.

Examples

Simple example:

DROP INDEX idx_name ON my_table;

Complex example:

DROP INDEX idx_name1, idx_name2, idx_name3 ON my_table;

Common Issues

• Using DROP INDEX on a non-existent index will result in an error.
• If the index is used by a foreign key constraint, the constraint must be dropped before the index can be dropped.

Integration

DROP INDEX can be used in conjunction with other MySQL commands, such as ALTER TABLE and CREATE INDEX. For example:

ALTER TABLE my_table DROP INDEX idx_name;
CREATE INDEX new_idx_name ON my_table (column_name);

Related Commands

• CREATE INDEX
• ALTER INDEX
• SHOW INDEXES