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52 lines
1.1 KiB
Markdown
52 lines
1.1 KiB
Markdown
---
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slug: /zh/sql-reference/aggregate-functions/reference/argmax
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sidebar_position: 106
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---
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# argMax {#agg-function-argmax}
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计算 `val` 最大值对应的 `arg` 值。 如果 `val` 最大值存在几个不同的 `arg` 值，输出遇到的第一个值。
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**语法**
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``` sql
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argMax(arg, val)
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```
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**参数**
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- `arg` — Argument.
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- `val` — Value.
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**返回值**
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- `val` 最大值对应的 `arg` 值。
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类型: 匹配 `arg` 类型。
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**示例**
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输入表:
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``` text
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┌─user─────┬─salary─┐
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│ director │ 5000 │
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│ manager │ 3000 │
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│ worker │ 1000 │
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└──────────┴────────┘
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```
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查询:
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``` sql
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SELECT argMax(user, salary), argMax(tuple(user, salary), salary) FROM salary;
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```
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结果:
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``` text
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┌─argMax(user, salary)─┬─argMax(tuple(user, salary), salary)─┐
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│ director │ ('director',5000) │
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└──────────────────────┴─────────────────────────────────────┘
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```
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