DROP INDEX

DROP INDEX is a SQL statement in the Indexes category. Removes an existing index from a table. The syntax is DROP INDEX index_name ON table_name;. It returns none (index removed). A typical example: DROP INDEX idx_last_name ON employees; A close relative is CREATE INDEX, which creates an index on one or more columns to speed up query performance. A close relative is COMPOSITE INDEX, which an index on multiple columns. Column order matters — queries use leftmost prefix. A close relative is EXPLAIN, which shows how MySQL executes a query — which indexes are used, table scan vs index scan. More about this category: Database indexes — CREATE INDEX, UNIQUE INDEX, COMPOSITE INDEX, DROP INDEX. Related Indexes entries: CREATE INDEX, COMPOSITE INDEX, EXPLAIN, FULLTEXT INDEX, SPATIAL INDEX, INCLUDE INDEX (Covering Index), PARTIAL INDEX, INVISIBLE INDEX. This page is part of the free SQL Reference documentation covering 762+ statements, functions, and clauses, each with syntax, parameters, return values, and examples for MySQL, PostgreSQL, SQL Server, and SQLite.