# & (Bitwise AND) (Transact-SQL)

**THIS TOPIC APPLIES TO:**SQL Server (starting with 2008)Azure SQL DatabaseAzure SQL Data Warehouse Parallel Data Warehouse

Performs a bitwise logical AND operation between two integer values.

Transact-SQL Syntax Conventions

## Syntax

```
expression & expression
```

## Arguments

*expression*

Is any valid expression of any of the data types of the integer data type category, or the **bit**, or the **binary** or **varbinary** data types. *expression* is treated as a binary number for the bitwise operation.

Note

In a bitwise operation, only one *expression* can be of either **binary** or **varbinary** data type.

## Result Types

**int** if the input values are **int**.

**smallint** if the input values are **smallint**.

**tinyint** if the input values are **tinyint** or **bit**.

## Remarks

The **&** bitwise operator performs a bitwise logical AND between the two expressions, taking each corresponding bit for both expressions. The bits in the result are set to 1 if and only if both bits (for the current bit being resolved) in the input expressions have a value of 1; otherwise, the bit in the result is set to 0.

If the left and right expressions have different integer data types (for example, the left *expression* is **smallint** and the right *expression* is **int**), the argument of the smaller data type is converted to the larger data type. In this case, the **smallint***expression* is converted to an **int**.

## Examples

The following example creates a table using the **int** data type to store the values and inserts two values into one row.

```
CREATE TABLE bitwise
(
a_int_value int NOT NULL,
b_int_value int NOT NULL
);
GO
INSERT bitwise VALUES (170, 75);
GO
```

This query performs the bitwise AND between the `a_int_value`

and `b_int_value`

columns.

```
SELECT a_int_value & b_int_value
FROM bitwise;
GO
```

Here is the result set:

```
-----------
10
(1 row(s) affected)
```

The binary representation of 170 (`a_int_value`

or `A`

) is `0000 0000 1010 1010`

. The binary representation of 75 (`b_int_value`

or `B`

) is `0000 0000 0100 1011`

. Performing the bitwise AND operation on these two values produces the binary result `0000 0000 0000 1010`

, which is decimal 10.

```
(A & B)
0000 0000 1010 1010
0000 0000 0100 1011
-------------------
0000 0000 0000 1010
```

## See Also

Expressions (Transact-SQL)

Operators (Transact-SQL)

Bitwise Operators (Transact-SQL)

&= (Bitwise AND Assignment) (Transact-SQL)

Compound Operators (Transact-SQL)