Important

The SingleStore 9.1 release candidate (RC) is available now. It will be promoted to general availability (GA) soon and at that time it will be renamed to SingleStore 10.

In the interim, SingleStore 9.1 RC can be used to preview, evaluate, and provide feedback on the new and upcoming features in SingleStore 10, while SingleStore 9.0 is recommended for production workloads.

ROW_NUMBER

Syntax

ROW_NUMBER () OVER (
    [PARTITION BY (col | expr), ...]
    [ORDER BY (col | expr), ...]
)

Return Type

An integer

Examples

SQL

CREATE TABLE rownum_example (a int, b int);

INSERT INTO rownum_example VALUES(1,2),(2,2),(3,3),(4,3);

SQL

SELECT a,b, ROW_NUMBER() OVER() FROM rownum_example;

+------+------+---------------------+
| a    | b    | ROW_NUMBER() OVER() |
+------+------+---------------------+
|    3 |    3 |                   1 |
|    4 |    3 |                   2 |
|    2 |    2 |                   3 |
|    1 |    2 |                   4 |
+------+------+---------------------+

SQL

SELECT a,b, ROW_NUMBER() OVER(PARTITION BY b ORDER BY a DESC) FROM rownum_example;

+------+------+---------------------------------------------------+
| a    | b    | row_number() over(partition by b order by a desc) |
+------+------+---------------------------------------------------+
|    2 |    2 |                                                 1 |
|    1 |    2 |                                                 2 |
|    4 |    3 |                                                 1 |
|    3 |    3 |                                                 2 |
+------+------+---------------------------------------------------+