Sql Programming Tutorials, Guides & Best Practices

Optimizing MySQL queries is essential for improving the performance of your applications and ensuring efficient use of database resources. This tutorial will cover various techniques and best practices to help you write efficient SQL queries that reduce execution time and resource consumption.

• Basic knowledge of SQL and MySQL operations.
• Access to a MySQL server for executing sample queries.
• Familiarity with MySQL tools like EXPLAIN for query analysis.

The UNION operator combines results from two or more SELECT statements, removing duplicates. Use UNION ALL to include duplicates.

SELECT column1 FROM table1
UNION
SELECT column1 FROM table2;