SQL Optimization

Techniques for Query Optimization

Use Indexing – Indexes improve search performance.

Optimize Joins – Use proper indexing in joins.

Avoid SELECT * – Retrieve only necessary columns.

Use Proper Data Types – Reduce storage and improve performance.

Example: Creating an Index

CREATE INDEX idx_salary ON employees (salary);

Example: Optimizing a Query

SELECT name, department FROM employees WHERE salary > 50000;