mirror of
https://github.com/ClickHouse/ClickHouse.git
synced 2024-12-04 13:32:13 +00:00
51 lines
1.0 KiB
Markdown
51 lines
1.0 KiB
Markdown
---
|
|
toc_priority: 106
|
|
---
|
|
|
|
# argMax {#agg-function-argmax}
|
|
|
|
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。
|
|
|
|
**语法**
|
|
|
|
``` sql
|
|
argMax(arg, val)
|
|
```
|
|
|
|
**参数**
|
|
|
|
- `arg` — Argument.
|
|
- `val` — Value.
|
|
|
|
**返回值**
|
|
|
|
- `val` 最大值对应的 `arg` 值。
|
|
|
|
类型: 匹配 `arg` 类型。
|
|
|
|
**示例**
|
|
|
|
输入表:
|
|
|
|
``` text
|
|
┌─user─────┬─salary─┐
|
|
│ director │ 5000 │
|
|
│ manager │ 3000 │
|
|
│ worker │ 1000 │
|
|
└──────────┴────────┘
|
|
```
|
|
|
|
查询:
|
|
|
|
``` sql
|
|
SELECT argMax(user, salary), argMax(tuple(user, salary), salary) FROM salary;
|
|
```
|
|
|
|
结果:
|
|
|
|
``` text
|
|
┌─argMax(user, salary)─┬─argMax(tuple(user, salary), salary)─┐
|
|
│ director │ ('director',5000) │
|
|
└──────────────────────┴─────────────────────────────────────┘
|
|
```
|