Last active
September 17, 2018 07:38
-
-
Save nakagami/b2888278a3dd2e3c84d9 to your computer and use it in GitHub Desktop.
SQL functions RANK(), PERCENT_RANK(), CUME_DIST() and NTILE()
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
CREATE TABLE test_rank ( | |
i integer, | |
s varchar(1) | |
); | |
INSERT INTO test_rank (i, s) VALUES (1, 'A'); | |
INSERT INTO test_rank (i, s) VALUES (2, 'B'); | |
INSERT INTO test_rank (i, s) VALUES (2, 'b'); | |
INSERT INTO test_rank (i, s) VALUES (3, 'D'); | |
INSERT INTO test_rank (i, s) VALUES (4, 'E'); | |
SELECT | |
ROW_NUMBER() OVER (ORDER BY i), | |
RANK() OVER (ORDER BY i), | |
DENSE_RANK() OVER (ORDER BY i), | |
PERCENT_RANK() OVER (ORDER BY i), | |
CUME_DIST() OVER (ORDER BY i), | |
NTILE(4) OVER (ORDER BY i), | |
s | |
FROM test_rank ORDER BY i, s; | |
row_number | rank | dense_rank | percent_rank | cume_dist | ntile | s | |
------------+------+------------+--------------+-----------+-------+--- | |
1 | 1 | 1 | 0 | 0.2 | 1 | A | |
2 | 2 | 2 | 0.25 | 0.6 | 1 | B | |
3 | 2 | 2 | 0.25 | 0.6 | 2 | b | |
4 | 4 | 3 | 0.75 | 0.8 | 3 | D | |
5 | 5 | 4 | 1 | 1 | 4 | E | |
(5 rows) |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment