Indexing in SQL

 Indexing in SQL

Indexes are data structures that are used to improve the performance of database queries. Indexes can be created on one or more columns in a table to allow faster searching and sorting. Here's an example:

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CREATE INDEX idx_name ON employees (name);

In this example, we're creating an index called "idx_name" on the "name" column of the "employees" table. This index will allow faster searching and sorting based on the employee's name.