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73 lines
2.4 KiB
Markdown
73 lines
2.4 KiB
Markdown
---
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slug: /ja/sql-reference/window-functions/percent_rank
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sidebar_label: percent_rank
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sidebar_position: 8
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---
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# percent_rank
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行の相対的な順位（すなわちパーセンタイル）をウィンドウパーティション内で返します。
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**構文**
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別名: `percentRank`（大文字小文字を区別）
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```sql
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percent_rank (column_name)
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OVER ([[PARTITION BY grouping_column] [ORDER BY sorting_column]
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[RANGE BETWEEN UNBOUNDED PRECEDING AND UNBOUNDED FOLLOWING]] | [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] RANGE BETWEEN UNBOUNDED PRECEDING AND UNBOUNDED FOLLOWING)
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```
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デフォルトで必要なウィンドウフレーム定義は `RANGE BETWEEN UNBOUNDED PRECEDING AND UNBOUNDED FOLLOWING` です。
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ウィンドウ関数の構文の詳細については、こちらを参照してください: [ウィンドウ関数 - 構文](./index.md/#syntax)。
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**例**
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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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('South Hampton Seagulls', 'Douglas Benson', 150000, 'M'),
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('South Hampton Seagulls', 'James Henderson', 140000, 'M');
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```
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```sql
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SELECT player, salary,
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percent_rank() OVER (ORDER BY salary DESC) AS percent_rank
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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─┬───────percent_rank─┐
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1. │ Gary Chen │ 195000 │ 0 │
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2. │ Robert George │ 195000 │ 0 │
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3. │ Charles Juarez │ 190000 │ 0.3333333333333333 │
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4. │ Michael Stanley │ 150000 │ 0.5 │
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5. │ Scott Harrison │ 150000 │ 0.5 │
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6. │ Douglas Benson │ 150000 │ 0.5 │
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7. │ James Henderson │ 140000 │ 1 │
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└─────────────────┴────────┴────────────────────┘
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```
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