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#34 50 Advanced SQL Queries Every Developer Should Know
- This article explores 50 advanced SQL queries covering window functions, recursive CTEs, pivoting, performance optimization, and more.
- Window functions like ROW_NUMBER(), RANK(), DENSE_RANK(), and NTILE() help in performing computations across rows.
- Functions like LEAD(), LAG(), FIRST_VALUE(), and LAST_VALUE() provide access to next/previous row values and first/last values in a window.
- Advanced SQL techniques include running totals, moving averages, common table expressions (CTEs), and recursive queries.
- Pivoting and unpivoting data is achieved through techniques like CASE, PIVOT, and UNPIVOT.
- The article delves into advanced aggregates, JSON/XML handling, dynamic SQL, advanced joins, and set operations.
- It covers topics like performance optimization, database administration, date & time operations, string manipulation, security permissions, and more.
- Queries like UPSERT, MERGE, DELETE with JOIN, UPDATE from another table, and handling long-running queries are also discussed.
- The article concludes with 20 additional advanced SQL queries, providing an extensive coverage of essential SQL techniques for developers.
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