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🧩 SQL Articles
INNER JOIN vs LEFT JOIN
Primary Key vs Foreign Key
GROUP BY & HAVING Clause
Subqueries (Nested Queries)
Joins in SQL (Quick Deep Dive)
SQL Constraints
Indexes in SQL
SQL Views
SQL Stored Procedures
SQL Transactions (ACID, Commit, Rollback, Savepoint)
SQL Triggers
SQL UNION vs UNION ALL
EXISTS vs IN Clause
SQL ANY vs ALL Operators
Common Table Expressions (CTE) in SQL
Window Functions in SQL
Recursive CTEs (Hierarchical Queries) in SQL
SQL PIVOT and UNPIVOT Operations
SQL Ranking Functions – RANK, DENSE_RANK, ROW_NUMBER
SQL CASE Expressions and Conditional Logic
SQL SELF JOIN and Real-World Use Cases
SQL GROUPING SETS, ROLLUP, and CUBE
SQL COALESCE and NULL Handling Techniques
SQL String Functions Cheat Sheet
SQL Date and Time Functions
SQL Joins Across Multiple Tables
SQL Analytical Functions – LEAD, LAG, FIRST_VALUE, LAST_VALUE
SQL Cumulative and Moving Aggregations
SQL Correlated Subqueries
SQL EXISTS vs NOT EXISTS
SQL Temporary Tables vs Table Variables vs CTEs
SQL Joins Optimization and Performance Tuning Techniques
SQL Index Performance Analysis and Query Optimization
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