# How the BIT_XOR() function works in Mariadb?

MariaDB’s `BIT_XOR()`

function is used to perform a bitwise exclusive OR (XOR) operation on all bits in a given expression.

The MariaDB `BIT_XOR()`

function is used to perform a bitwise exclusive OR (XOR) operation on all bits in a given expression. This function is useful in scenarios where you need to compare binary values and determine which bits are different between them.

## Syntax

The syntax for the MariaDB `BIT_XOR()`

function is as follows:

```
BIT_XOR(expr)
```

This function takes an expression `expr`

as an argument and returns the result of the bitwise XOR operation.

## Examples

### Example 1: Basic Usage

To illustrate the basic usage of `BIT_XOR()`

, consider the following SQL statement:

```
SELECT BIT_XOR(6);
```

```
+------------+
| BIT_XOR(6) |
+------------+
| 6 |
+------------+
```

The output is `6`

because the bitwise XOR of `6`

(which is `110`

in binary) with itself is `000`

, but since this is an aggregate function, without other rows to compare, it returns the input value.

### Example 2: XOR Operation with Multiple Numbers

This example demonstrates how `BIT_XOR()`

operates with multiple numbers:

```
SELECT BIT_XOR(6 ^ 3);
```

```
+----------------+
| BIT_XOR(6 ^ 3) |
+----------------+
| 5 |
+----------------+
```

The output is `5`

because the bitwise XOR of `6`

(`110`

in binary) and `3`

(`011`

in binary) is `101`

.

### Example 3: XOR Operation with No Rows

Here’s what happens when there are no matching rows:

```
SELECT BIT_XOR(NULL);
```

```
+---------------+
| BIT_XOR(NULL) |
+---------------+
| 0 |
+---------------+
```

When no rows match, `BIT_XOR()`

returns `0`

.

### Example 4: XOR Operation with Large Numbers

Let’s see how `BIT_XOR()`

works with larger numbers:

```
SELECT BIT_XOR(1024 ^ 2048);
```

```
+----------------------+
| BIT_XOR(1024 ^ 2048) |
+----------------------+
| 3072 |
+----------------------+
```

The output is `3072`

because the bitwise XOR of `1024`

(`10000000000`

in binary) and `2048`

(`100000000000`

in binary) is `3072`

(`110000000000`

in binary).

## Related Functions

Here are a few functions related to MariaDB’s `BIT_XOR()`

:

- MariaDB’s
`BIT_AND()`

function is used to perform a bitwise AND operation on all bits in an expression. - MariaDB’s
`BIT_OR()`

function is used to perform a bitwise OR operation on all bits in an expression. - MariaDB’s
`BIT_COUNT()`

function is used to count the number of bits that are set in an expression.

## Conclusion

The `BIT_XOR()`

function in MariaDB is an essential tool for bitwise comparison of binary values. It is especially useful in scenarios where identifying differences between sets of binary data is required. By understanding how to use `BIT_XOR()`

and related functions, one can effectively manipulate and analyze binary data within a database.