SQLROW_NUMBERwindowtutorial
What is ROW_NUMBER in SQL? Row numbering for beginners
ROW_NUMBER assigns "a sequential number to each row". Plain words: the first window function worth learning. Descending numbering, numbering within groups via PARTITION BY, the classic top-N per group pattern, and dedup. With tables and common pitfalls.
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ROW_NUMBERis a window function that assigns a sequential number to each row. The first gets 1, the second 2, and so on — no ties, no gaps.This article is currently in Russian. The full English translation is on the way.