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Creating Indexes in MySQL

The MySQL server allows us to create indexes, which improves the speed of operations within a database table. In this Lab, we will be creating new indexes on existing tables, creating a new table with an index, and deleting an existing index from a table. Completing this lab will demonstrate a working knowledge of indexes in MySQL.

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Lab Info
Level
Intermediate
Last updated
Sep 17, 2025
Duration
1h 0m

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Table of Contents
  1. Challenge

    Log into the MySQL Server as root and Use the world Database

    Log into the MySQL server, using Linux4me! as a root MySQL password:

    # mysql -u root -p
    

    Use the world database:

    mysql> USE world;
    
  2. Challenge

    Create an Index Called `population` on the `city` Table Using the `Population` Column

    Run the following command to create the population index:

    mysql> CREATE INDEX population ON city(Population);
    
  3. Challenge

    Create an Index Called `primarylanguage` on the `countrylanguage` Table Using the `Language` and `IsOfficial` Columns

    Use the following command to create the primarylanguage index:

    mysql> CREATE INDEX primarylanguage ON countrylanguage(Language,IsOfficial);
    
  4. Challenge

    Create a New Table Named `countryexports` in the `world` Database Using the Information Provided in the Instructions

    Create the countryexports table using the following command:

    mysql> CREATE TABLE countryexports (Code CHAR(3) PRIMARY KEY, Name CHAR(52), Export VARCHAR(120), Quantity INT, INDEX export (Export));
    
  5. Challenge

    Delete the `capital` Index on the `country` Table

    Run the following command to delete the capital index:

    mysql> DROP INDEX capital ON country;
    
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