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68 lines
2.0 KiB
Markdown
68 lines
2.0 KiB
Markdown
---
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slug: /ja/sql-reference/window-functions/row_number
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sidebar_label: row_number
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sidebar_position: 2
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---
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# row_number
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行をそのパーティション内で1から順番に番号付けします。
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**構文**
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```sql
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row_number (column_name)
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OVER ([[PARTITION BY grouping_column] [ORDER BY sorting_column]
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[ROWS or RANGE expression_to_bound_rows_withing_the_group]] | [window_name])
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FROM table_name
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WINDOW window_name as ([[PARTITION BY grouping_column] [ORDER BY sorting_column])
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```
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ウィンドウ関数の構文についての詳細は、[Window Functions - Syntax](./index.md/#syntax) を参照してください。
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**返される値**
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- パーティション内の現在の行の番号。[UInt64](../data-types/int-uint.md)。
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**例**
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以下の例は、ビデオ教材 [Ranking window functions in ClickHouse](https://youtu.be/Yku9mmBYm_4?si=XIMu1jpYucCQEoXA) で提供されている例に基づいています。
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クエリ:
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```sql
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CREATE TABLE salaries
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(
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`team` String,
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`player` String,
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`salary` UInt32,
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`position` String
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)
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Engine = Memory;
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INSERT INTO salaries FORMAT Values
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('Port Elizabeth Barbarians', 'Gary Chen', 195000, 'F'),
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('New Coreystad Archdukes', 'Charles Juarez', 190000, 'F'),
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('Port Elizabeth Barbarians', 'Michael Stanley', 150000, 'D'),
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('New Coreystad Archdukes', 'Scott Harrison', 150000, 'D'),
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('Port Elizabeth Barbarians', 'Robert George', 195000, 'M');
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```
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```sql
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SELECT player, salary,
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row_number() OVER (ORDER BY salary DESC) AS row_number
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FROM salaries;
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```
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結果:
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```response
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┌─player──────────┬─salary─┬─row_number─┐
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1. │ Gary Chen │ 195000 │ 1 │
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2. │ Robert George │ 195000 │ 2 │
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3. │ Charles Juarez │ 190000 │ 3 │
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4. │ Scott Harrison │ 150000 │ 4 │
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5. │ Michael Stanley │ 150000 │ 5 │
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└─────────────────┴────────┴────────────┘
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```
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