Скачать или смотреть SQL Window Functions | Clearly Explained | PARTITION BY, ORDER BY, ROW_NUMBER, RANK, DENSE_RANK

SQL Pocket Guide author Alice Zhao breaks down each part of a window function, step-by-step.


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⏱️ Timestamps ⏱️
00:00 Intro
0:09: View the table
0:28: ORDER BY
1:18: Window function with ROW_NUMBER
1:40: OVER
2:36: Breaking down the window function
3:28: ROW_NUMBER vs RANK vs DENSE_RANK
5:13: PARTITION BY
6:52: Window function in a subquery

📄 CREATE & INSERT Statements 📄
CREATE TABLE baby_names (
Gender VARCHAR(10),
Name VARCHAR(50),
Total INT
);

INSERT INTO baby_names (Gender, Name, Total) VALUES
('Girl', 'Ava', 95),
('Girl', 'Emma', 106),
('Boy', 'Ethan', 115),
('Girl', 'Isabella', 100),
('Boy', 'Jacob', 101),
('Boy', 'Liam', 84),
('Boy', 'Logan', 73),
('Boy', 'Noah', 120),
('Girl', 'Olivia', 100),
('Girl', 'Sophia', 88);

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