mirror of
https://github.com/ClickHouse/ClickHouse.git
synced 2024-11-25 09:02:00 +00:00
67 lines
1.9 KiB
Markdown
67 lines
1.9 KiB
Markdown
---
|
|
slug: /en/sql-reference/window-functions/row_number
|
|
sidebar_label: row_number
|
|
sidebar_position: 7
|
|
---
|
|
|
|
# row_number
|
|
|
|
Numbers the current row within its partition starting from 1
|
|
|
|
**Syntax**
|
|
|
|
```sql
|
|
row_number (column_name)
|
|
OVER ([[PARTITION BY grouping_column] [ORDER BY sorting_column]
|
|
[ROWS or RANGE expression_to_bound_rows_withing_the_group]] | [window_name])
|
|
FROM table_name
|
|
WINDOW window_name as ([[PARTITION BY grouping_column] [ORDER BY sorting_column])
|
|
```
|
|
|
|
For more detail on window function syntax see: [Window Functions - Syntax](./index.md/#syntax).
|
|
|
|
**Returned value**
|
|
|
|
- A number for the current row within its partition. [UInt64](../data-types/int-uint.md).
|
|
|
|
**Example**
|
|
|
|
The following example is based on the example provided in the video instructional [Ranking window functions in ClickHouse](https://youtu.be/Yku9mmBYm_4?si=XIMu1jpYucCQEoXA).
|
|
|
|
Query:
|
|
|
|
```sql
|
|
CREATE TABLE salaries
|
|
(
|
|
`team` String,
|
|
`player` String,
|
|
`salary` UInt32,
|
|
`position` String
|
|
)
|
|
Engine = Memory;
|
|
|
|
INSERT INTO salaries FORMAT Values
|
|
('Port Elizabeth Barbarians', 'Gary Chen', 195000, 'F'),
|
|
('New Coreystad Archdukes', 'Charles Juarez', 190000, 'F'),
|
|
('Port Elizabeth Barbarians', 'Michael Stanley', 150000, 'D'),
|
|
('New Coreystad Archdukes', 'Scott Harrison', 150000, 'D'),
|
|
('Port Elizabeth Barbarians', 'Robert George', 195000, 'M');
|
|
```
|
|
|
|
```sql
|
|
SELECT player, salary,
|
|
row_number() OVER (ORDER BY salary DESC) AS row_number
|
|
FROM salaries;
|
|
```
|
|
|
|
Result:
|
|
|
|
```response
|
|
┌─player──────────┬─salary─┬─row_number─┐
|
|
1. │ Gary Chen │ 195000 │ 1 │
|
|
2. │ Robert George │ 195000 │ 2 │
|
|
3. │ Charles Juarez │ 190000 │ 3 │
|
|
4. │ Scott Harrison │ 150000 │ 4 │
|
|
5. │ Michael Stanley │ 150000 │ 5 │
|
|
└─────────────────┴────────┴────────────┘
|
|
``` |