计算位图列的 XOR ，返回 UInt64 类型的基数，如果添加后缀 State ，则返回 位图对象。
语法
```SQL
groupBitmapXor(expr)

</span>

**参数**
<span style="background-color: var(--ifm-code-background)"><code>expr</code></span> – 结果为 <span style="background-color: var(--ifm-code-background)"><code>AggregateFunction(groupBitmap, UInt*)</code></span> 类型的表达式。
**返回值**
<span style="background-color: var(--ifm-code-background)"><code>UInt64</code></span> 类型的值。
**示例**
<span style="background-color: initial">```SQL
DROP TABLE IF EXISTS bitmap_column_expr_test2;
CREATE TABLE bitmap_column_expr_test2
(
    tag_id String,
    z AggregateFunction(groupBitmap, UInt32)
)
ENGINE = MergeTree
ORDER BY tag_id;

INSERT INTO bitmap_column_expr_test2 VALUES ('tag1', bitmapBuild(cast([1,2,3,4,5,6,7,8,9,10] as Array(UInt32))));
INSERT INTO bitmap_column_expr_test2 VALUES ('tag2', bitmapBuild(cast([6,7,8,9,10,11,12,13,14,15] as Array(UInt32))));
INSERT INTO bitmap_column_expr_test2 VALUES ('tag3', bitmapBuild(cast([2,4,6,8,10,12] as Array(UInt32))));

SELECT groupBitmapXor(z) FROM bitmap_column_expr_test2 WHERE like(tag_id, 'tag%');
┌─groupBitmapXor(z)─┐
│              10   │
└───────────────────┘

SELECT arraySort(bitmapToArray(groupBitmapXorState(z))) FROM bitmap_column_expr_test2 WHERE like(tag_id, 'tag%');
┌─arraySort(bitmapToArray(groupBitmapXorState(z)))─┐
│ [1,3,5,6,8,10,11,13,14,15]                       │
└──────────────────────────────────────────────────┘