Optimizing SQL Server performance is crucial for maintaining efficient database operations, reducing response times, and improving overall application performance. Here are key tips and techniques to enhance SQL Server efficiency. 1. Indexing Strategies Proper indexing is one of the most effective ways to improve query performance. Consider these best practices: Use Clustered Indexes for frequently queried columns. Implement Non-Clustered Indexes to optimize SELECT queries. Avoid over-indexing, as it can slow down INSERT, UPDATE, and DELETE operations. Utilize Filtered Indexes to optimize queries for specific data subsets. 2. Query Optimization Poorly written queries can significantly degrade performance. To enhance query execution: Use EXPLAIN PLAN or Query Store to analyze execution plans. Avoid **SELECT *** and fetch only required columns. Use JOINs efficiently , preferring INNER JOIN over OUTER JOIN when...