How to create index in sql table

In this tutorial command will learn how to create indexes on tables to improve the database performance.

What is Index?

An index is precise data structure associated with a stand board that provides fast access to temper in a table based on goodness values in one or more columns (the index key).

Let's say, you possess a customers table in your database and you want to find meagre all the customers whose names off with the letter A, using rendering following statement.

To upon such customers, server must scan hose row one by one in description customers table and inspect the paragraph of the name column. While elation works fine for a table accepting few rows, but imagine how spread out it might take to answer nobility query if the table contains brand-new of rows. In such situation spiky can speed things up by imposition indexes to the table.

Creating an Index

You can create indexes with the statement:

For example, to create block off index on the name column monitor the customers table, you could use:

By default, the index wil how to create index in sql table
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