> ## Documentation Index
> Fetch the complete documentation index at: https://private-7c7dfe99-mintlify-fbfa8bee.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

> توثيق الدالة النافذة percent_rank

# percent_rank

تعيد الرتبة النسبية (أي القيمة المئينية) للصفوف داخل قسم النافذة.

**الصياغة**

الاسم المستعار: `percentRank` (حسّاس لحالة الأحرف)

```sql theme={null}
percent_rank ()
  OVER ([[PARTITION BY grouping_column] [ORDER BY sorting_column]
        [RANGE BETWEEN UNBOUNDED PRECEDING AND UNBOUNDED FOLLOWING]] | [window_name])
FROM table_name
WINDOW window_name as ([PARTITION BY grouping_column] [ORDER BY sorting_column] RANGE BETWEEN UNBOUNDED PRECEDING AND UNBOUNDED FOLLOWING)
```

التعريف الافتراضي والإلزامي لإطار النافذة هو `RANGE BETWEEN UNBOUNDED PRECEDING AND UNBOUNDED FOLLOWING`.

لمزيد من التفاصيل حول صياغة دوال النافذة، راجع: [دوال النافذة - الصياغة](/ar/reference/functions/window-functions/index#syntax).

**مثال**

```sql title="Query" theme={null}
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'),
    ('South Hampton Seagulls', 'Douglas Benson', 150000, 'M'),
    ('South Hampton Seagulls', 'James Henderson', 140000, 'M');
```

```sql title="Query" theme={null}
SELECT player, salary,
       percent_rank() OVER (ORDER BY salary DESC) AS percent_rank
FROM salaries;
```

```response title="Response" theme={null}

   ┌─player──────────┬─salary─┬───────percent_rank─┐
1. │ Gary Chen       │ 195000 │                  0 │
2. │ Robert George   │ 195000 │                  0 │
3. │ Charles Juarez  │ 190000 │ 0.3333333333333333 │
4. │ Michael Stanley │ 150000 │                0.5 │
5. │ Scott Harrison  │ 150000 │                0.5 │
6. │ Douglas Benson  │ 150000 │                0.5 │
7. │ James Henderson │ 140000 │                  1 │
   └─────────────────┴────────┴────────────────────┘

```