Mastering SQL Subqueries: Single-Row, Multi-Row & Correlated Subqueries Explained
Unlock the full power of SQL with this comprehensive guide to SQL Subqueries. In this lecture, we explore subqueries in depth, covering both single-row and multi-row variations, as well as correlated subqueries. Learn how to effectively use subqueries in different clauses like SELECT, WHERE, and FROM, along with key best practices for optimal performance.
📌 Topics Covered:
Introduction to Subqueries
Single-Row Subqueries
• In SELECT Clause
• In WHERE Clause
- Multi-Row Subqueries
• Using IN, ANY, ALL
• In WHERE Clause
• In FROM Clause
- Correlated Subqueries
• In WHERE Clause
• In SELECT Clause
- Best Practices and Performance Considerations
- Conclusion
🎯 Whether you're a beginner or an advanced learner, this session will sharpen your SQL skills and deepen your understanding of query optimization.
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