GROUP BY & window functions

Aggregate rows into summaries with GROUP BY/HAVING, then keep row detail while computing running totals, ranks and comparisons with window functions.

30 min · 6 steps · videoJump to quiz ↓

SQL Window Function | How to write SQL Query using RANK, DENSE RANK, LEAD/LAG | SQL Queries Tutorial techTFQ · 30 min

Step 1 of 6 · Overview30 min read ·

Key idea

Prereqs: SELECT & JOIN. Next: Indexes & query plans. CS50 SQL Lecture 0–1 aggregates + standard window functions (Postgres/SQLite 3.25+).

Next: 1. Aggregates and GROUP BY

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