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49 lines
507 B
Markdown
49 lines
507 B
Markdown
---
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toc_priority: 125
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---
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# groupBitAnd {#groupbitand}
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对于数字序列按位应用 `AND` 。
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**语法**
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``` sql
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groupBitAnd(expr)
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```
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**参数**
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`expr` – 结果为 `UInt*` 类型的表达式。
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**返回值**
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`UInt*` 类型的值。
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**示例**
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测试数据:
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``` text
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binary decimal
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00101100 = 44
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00011100 = 28
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00001101 = 13
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01010101 = 85
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```
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查询:
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``` sql
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SELECT groupBitAnd(num) FROM t
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```
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`num` 是包含测试数据的列。
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结果:
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``` text
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binary decimal
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00000100 = 4
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```
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