Mastering SQL: From Fundamentals to Advanced Techniques

What Will You Learn?

• Understand databases, tables, rows, columns, keys, and data types
• Write SQL queries using SELECT, WHERE, ORDER BY, and LIMIT
• Work with NULL values, functions, dates, and conditional logic
• Use GROUP BY, HAVING, and aggregate functions
• Combine data using different types of JOIN
• Work with subqueries, CTEs, and set operations
• Use window functions such as ROW_NUMBER, RANK, LAG, and LEAD
• Build recursive queries for hierarchical data
• Insert, update, and delete data safely
• Understand transactions, ACID, isolation, and locking
• Create and use indexes for better performance
• Read EXPLAIN output and optimize slow queries
• Apply SQL security practices and prevent SQL injection
• Build practical reports using advanced SQL techniques