ClickHouse/docs/en/sql-reference/aggregate-functions/reference/groupbitand.md

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---
toc_priority: 125
---
# groupBitAnd {#groupbitand}
Applies bitwise `AND` for series of numbers.
``` sql
groupBitAnd(expr)
```
**Arguments**
`expr` An expression that results in `UInt*` type.
**Return value**
Value of the `UInt*` type.
**Example**
Test data:
``` text
binary decimal
00101100 = 44
00011100 = 28
00001101 = 13
01010101 = 85
```
Query:
``` sql
SELECT groupBitAnd(num) FROM t
```
Where `num` is the column with the test data.
Result:
``` text
binary decimal
00000100 = 4
```