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SQL Mastery
Introduction
Setup
SELECT, WHERE, Aggregations
Grouping, Ordering, More Aggregations
Functions & Dates
JOINs
Math & String Functions
Subqueries
Window Functions
Data Definition Language (DDL)
Views & Temporary Tables
Lessons ☰
Window Functions
Using window functions to run calculations across related rows without collapsing your data. Rankings, running totals, and comparisons explained clearly with real use cases.