Create Index in SQL: Step-by-Step Guide

The steps for creating an index are as follows:

1. Choose the table for which you want to create an index: Identify the table on which you want to create an index.
2. Choose the columns to be indexed: Decide on which columns to create indexes.
3. Determine the index type: distinguish whether to create a unique index or a regular index.
4. Index creation: To create an index, use the CREATE INDEX statement, the syntax is as follows:

CREATE INDEX index_name ON table_name (column1, column2, ...);

1. To check if the index has been successfully created, you can use the “SHOW INDEXES FROM table_name;” statement.
2. Test the effectiveness of the index: You can test the effectiveness of the index by running query statements to see if it improves query performance.