docs/sql-manual/sql-functions/bitmap-functions/bitmap-xor-count.md

---
{
    "title": "BITMAP_XOR_COUNT",
    "language": "en"
}
---

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## bitmap_xor_count

### description

#### Syntax

`BIGINT BITMAP_XOR_COUNT(BITMAP lhs, BITMAP rhs, ...)`

XOR two or more bitmap sets and return the size of the result set.

### example

```
mysql> select bitmap_xor_count(bitmap_from_string('1,2,3'),bitmap_from_string('3,4,5'));
+----------------------------------------------------------------------------+
| bitmap_xor_count(bitmap_from_string('1,2,3'), bitmap_from_string('3,4,5')) |
+----------------------------------------------------------------------------+
|                                                                          4 |
+----------------------------------------------------------------------------+

mysql> select bitmap_xor_count(bitmap_from_string('1,2,3'),bitmap_from_string('1,2,3'));
+----------------------------------------------------------------------------+
| bitmap_xor_count(bitmap_from_string('1,2,3'), bitmap_from_string('1,2,3')) |
+----------------------------------------------------------------------------+
|                                                                          0 |
+----------------------------------------------------------------------------+

mysql> select bitmap_xor_count(bitmap_from_string('1,2,3'),bitmap_from_string('4,5,6'));
+----------------------------------------------------------------------------+
| bitmap_xor_count(bitmap_from_string('1,2,3'), bitmap_from_string('4,5,6')) |
+----------------------------------------------------------------------------+
|                                                                          6 |
+----------------------------------------------------------------------------+

MySQL> select (bitmap_xor_count(bitmap_from_string('2,3'),bitmap_from_string('1,2,3,4'),bitmap_from_string('3,4,5')));
+-----------------------------------------------------------------------------------------------------------+
| (bitmap_xor_count(bitmap_from_string('2,3'), bitmap_from_string('1,2,3,4'), bitmap_from_string('3,4,5'))) |
+-----------------------------------------------------------------------------------------------------------+
|                                                                                                         3 |
+-----------------------------------------------------------------------------------------------------------+

MySQL> select (bitmap_xor_count(bitmap_from_string('2,3'),bitmap_from_string('1,2,3,4'),bitmap_from_string('3,4,5'),bitmap_empty()));
+---------------------------------------------------------------------------------------------------------------------------+
| (bitmap_xor_count(bitmap_from_string('2,3'), bitmap_from_string('1,2,3,4'), bitmap_from_string('3,4,5'), bitmap_empty())) |
+---------------------------------------------------------------------------------------------------------------------------+
|                                                                                                                         3 |
+---------------------------------------------------------------------------------------------------------------------------+

MySQL> select (bitmap_xor_count(bitmap_from_string('2,3'),bitmap_from_string('1,2,3,4'),bitmap_from_string('3,4,5'),NULL));
+-----------------------------------------------------------------------------------------------------------------+
| (bitmap_xor_count(bitmap_from_string('2,3'), bitmap_from_string('1,2,3,4'), bitmap_from_string('3,4,5'), NULL)) |
+-----------------------------------------------------------------------------------------------------------------+
|                                                                                                            NULL |
+-----------------------------------------------------------------------------------------------------------------+
```

### keywords

    BITMAP_XOR_COUNT,BITMAP