SQL CREATE INDEX Statement

The SQL CREATE INDEX statement is used to create an index on a table. An index is a data structure that allows you to quickly search for and retrieve data from a table. It is an important part of any SQL query and can improve the performance of SELECT, UPDATE, and DELETE statements. CREATE INDEX is a powerful operation and is an important part of database design and optimization.

Syntax

CREATE INDEX index_name ON table_name (column_name);
    

Example

CREATE INDEX idx_customers_name ON customers (name);
    

This example creates an index called "idx_customers_name" on the "customers" table, based on the "name" column. This index will allow you to quickly search for and retrieve records based on the name of the customer. You can create multiple indexes on a single table to improve the performance of different queries.

You can learn more about SQL CREATE INDEX and other advanced topics in our SQL tutorials and references.