ROW_NUMBER()
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The parent of this page is: Functions for MariaDB Enterprise Server
Topics on this page:
Overview
This window function returns the row number of the current row within its partition. Row number ranges from 1 to number of rows in the partition.
EXAMPLES
CREATE TABLE t1 (a INT, b INT);
INSERT INTO t1 VALUES
(1,3), (1,5), (8,2), (5,7), (5,6),
(10,1), (6,4), (3,9), (3,9), (7,2),
(7,5), (2,6), (9,10), (9,5), (4,8);
SELECT a, b,
ROW_NUMBER() OVER w AS 'row_number',
RANK() OVER w AS 'rank',
DENSE_RANK() OVER w AS 'dense_rank'
FROM t1
WINDOW w AS (ORDER BY a, b);
+------+------+------------+------+------------+
| a | b | row_number | rank | dense_rank |
+------+------+------------+------+------------+
| 1 | 3 | 1 | 1 | 1 |
| 1 | 5 | 2 | 2 | 2 |
| 2 | 6 | 3 | 3 | 3 |
| 3 | 9 | 4 | 4 | 4 |
| 3 | 9 | 5 | 4 | 4 |
| 4 | 8 | 6 | 6 | 5 |
| 5 | 6 | 7 | 7 | 6 |
| 5 | 7 | 8 | 8 | 7 |
| 6 | 4 | 9 | 9 | 8 |
| 7 | 2 | 10 | 10 | 9 |
| 7 | 5 | 11 | 11 | 10 |
| 8 | 2 | 12 | 12 | 11 |
| 9 | 5 | 13 | 13 | 12 |
| 9 | 10 | 14 | 14 | 13 |
| 10 | 1 | 15 | 15 | 14 |
+------+------+------------+------+------------+
CHANGE HISTORY
EXTERNAL REFERENCES
Additional information on this topic may be found in the MariaDB Public Knowledge Base.