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33 lines
993 B
Markdown
33 lines
993 B
Markdown
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---
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toc_priority: 106
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---
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# argMax {#agg-function-argmax}
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语法: `argMax(arg, val)` 或 `argMax(tuple(arg, val))`
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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(`arg`)值。
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这个函数的Tuple版本将返回`val`最大值对应的tuple。本函数适合和`SimpleAggregateFunction`搭配使用。
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**示例:**
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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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``` sql
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SELECT argMax(user, salary), argMax(tuple(user, salary)) FROM salary
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```
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``` text
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┌─argMax(user, salary)─┬─argMax(tuple(user, salary))─┐
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│ director │ ('director',5000) │
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└──────────────────────┴─────────────────────────────┘
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```
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