Tutorials Programming Tutorials, Guides & Best Practices

CREATE INDEX index_name ON table_name(column1, column2);

For example, to create a composite index on first_name and last_name:

Monitoring MySQL database performance is crucial for maintaining efficient and reliable database operations. By keeping an eye on performance metrics, you can identify bottlenecks, optimize queries, and ensure that your database is running smoothly. This tutorial will cover various tools and techniques for monitoring MySQL performance.

• Basic understanding of MySQL and SQL operations.
• Access to a MySQL server.
• Familiarity with command-line tools and basic server administration.

Query caching stores the results of a query, reducing execution time for repeated queries with the same parameters.

• Enable query caching in your MySQL configuration by setting query_cache_size and query_cache_type.
• Ensure your application logic allows for caching (i.e., queries are identical).

• START TRANSACTION: Begins a new transaction.
• COMMIT: Saves the changes made in the transaction permanently.
• ROLLBACK: Reverts the changes made in the transaction.

START TRANSACTION;

INSERT INTO accounts (user_id, balance) VALUES (1, 100);

UPDATE accounts SET balance = balance - 50 WHERE user_id = 1;

COMMIT;