SQL queries, optimization, window functions
Complete guide to Azure SQL Database for data engineers. Covers service tiers, DTU vs vCore, authentication methods, Managed Identity, firewall rules, stored procedures, temporal tables, pipeline integration, and cost optimization.
Azure SQL Database for Data Engineers: Setup, Configuration, and Pipeline Integration Read More »
Master SQL CTEs and subqueries. Learn when to use each, how to chain multiple CTEs, recursive CTEs for hierarchies, deduplication patterns, and real-world data engineering examples.
SQL CTEs and Subqueries Explained: When to Use Each and Why CTEs Win Read More »
Master every SQL join type with visual diagrams and real examples. Covers INNER, LEFT, RIGHT, FULL OUTER, CROSS, and SELF joins, plus ON vs WHERE, CTEs with joins, performance tips, and interview questions.
SQL Joins Explained: INNER, LEFT, RIGHT, FULL, CROSS, and SELF Joins with Real Examples Read More »
Master SQL window functions with real examples. Covers ROW_NUMBER, RANK, DENSE_RANK, NTILE, LAG, LEAD, running totals, moving averages, frame clauses, and the most common interview questions.
SQL Window Functions Explained: ROW_NUMBER, RANK, DENSE_RANK, LAG, LEAD, and More Read More »
