Why is query optimization an important skill?

Query optimization is important for several reasons:

• Improving performance: Fast queries reduce application response times and provide a better user experience.
• Reducing database load: Optimized queries require fewer resources (CPU, memory, disk), allowing the database to serve more users and operations.
• Scalability: Efficient queries help when increasing data volume or the number of users, preventing performance degradation.
• Cost reduction: Less load on the database can mean lower infrastructure costs.
• System stability: Non-optimized queries can cause locks, timeouts, and system failures.