# 对数组进行排序
<a name="sorting-arrays"></a>

要从一组行创建唯一值的排序数组，您可以使用 [array\_sort](https://prestodb.io/docs/current/functions/array.html#array_sort) 函数，如以下示例中所示。

```
WITH
dataset AS (
  SELECT ARRAY[3,1,2,5,2,3,6,3,4,5] AS items
)
SELECT array_sort(array_agg(distinct i)) AS array_items
FROM dataset
CROSS JOIN UNNEST(items) AS t(i)
```

此查询返回：

```
+--------------------+
| array_items        |
+--------------------+
| [1, 2, 3, 4, 5, 6] |
+--------------------+
```

要了解如何将数组展开为多行，请参阅 [展平嵌套数组](flattening-arrays.md)。