Boosting Query Speed by Creating Indexes in MySQL

Add an Index for Query Optimization

Write a MySQL query to add an index on the CustomerID column in the Orders table to improve query performance.

Solution:

-- Add an index on the "CustomerID" column in the Orders table.
ALTER TABLE Orders ADD INDEX idx_customer (CustomerID);

Explanation:

• Purpose of the Query:
• To create an index that accelerates queries filtering or joining on the CustomerID column.
• Demonstrates how indexing can improve query performance.
• Key Components:
• ALTER TABLE Orders : Specifies the table to be altered.
• ADD INDEX idx_customer (CustomerID) : Creates an index named idx_customer on the CustomerID column.
• Real-World Application:
• Enhances the performance of queries that frequently use the CustomerID field in WHERE or JOIN clauses.

Notes:

• Ensure that the column data type is appropriate for indexing.
• Adding indexes can speed up SELECT queries but may slow down INSERT or UPDATE operations.

For more Practice: Solve these Related Problems:

• Write a MySQL query to add an index on the `OrderDate` column in the Orders table to improve query performance.
• Write a MySQL query to add an index on the `ProductName` column in the Products table to optimize search queries.
• Write a MySQL query to add an index on the `Email` column in the Users table to speed up login authentication queries.
• Write a MySQL query to add an index on the `CategoryID` column in the Products table to enhance filtering by category.

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