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.

PERCENT_RANK

Syntax

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

Return Type

A DOUBLE data type.

Examples

SQL

CREATE TABLE pr_example (a int, b int);

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

SQL

SELECT a,b, PERCENT_RANK() OVER(ORDER BY a,b) FROM pr_example;

+------+------+-----------------------------------+
| a    | b    | percent_rank() over(order by a,b) |
+------+------+-----------------------------------+
|    1 |    2 |                                 0 |
|    2 |    2 |                0.3333333333333333 |
|    3 |    3 |                0.6666666666666666 |
|    4 |    3 |                                 1 |
+------+------+-----------------------------------+

SQL

SELECT a,b, PERCENT_RANK() OVER(ORDER BY b) FROM pr_example;

+------+------+---------------------------------+
| a    | b    | percent_rank() over(order by b) |
+------+------+---------------------------------+
|    1 |    2 |                               0 |
|    2 |    2 |                               0 |
|    3 |    3 |              0.6666666666666666 |
|    4 |    3 |              0.6666666666666666 |
+------+------+---------------------------------+