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

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# bitmap_and_count
## description
### Syntax

`BigIntVal bitmap_and_count(BITMAP lhs, BITMAP rhs)`

Calculate the intersection of two input bitmaps and return the number of intersections.

## example

```
MySQL> select bitmap_and_count(bitmap_from_string('1,2,3'),bitmap_empty());
+---------------------------------------------------------------+
| bitmap_and_count(bitmap_from_string('1,2,3'), bitmap_empty()) |
+---------------------------------------------------------------+
|                                                             0 |
+---------------------------------------------------------------+


MySQL> select bitmap_and_count(bitmap_from_string('1,2,3'),bitmap_from_string('1,2,3'));
+----------------------------------------------------------------------------+
| bitmap_and_count(bitmap_from_string('1,2,3'), bitmap_from_string('1,2,3')) |
+----------------------------------------------------------------------------+
|                                                                          3 |
+----------------------------------------------------------------------------+

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

## keyword

    BITMAP_AND_COUNT,BITMAP