ClickHouse/docs/zh/sql-reference/aggregate-functions/reference/minmap.md

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---
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slug: /zh/sql-reference/aggregate-functions/reference/minmap
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sidebar_position: 142
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---
# minMap {#agg_functions-minmap}
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**语法**
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```sql
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minMap(key, value)
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minMap(Tuple(key, value))
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```
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根据 `key` 数组中指定的键对 `value` 数组计算最小值。
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传递 `key``value` 数组的元组与传递 `key``value` 的两个数组是同义的。
要总计的每一行的 `key``value` (数组)元素的数量必须相同。
返回两个数组组成的元组: 排好序的 `key` 和对应 `key``value` 计算值(最小值)。
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**示例**
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``` sql
SELECT minMap(a, b)
FROM values('a Array(Int32), b Array(Int64)', ([1, 2], [2, 2]), ([2, 3], [1, 1]))
```
``` text
┌─minMap(a, b)──────┐
│ ([1,2,3],[2,1,1]) │
└───────────────────┘
```