yangzhg commented on a change in pull request #6910:
URL: https://github.com/apache/incubator-doris/pull/6910#discussion_r736120494
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File path:
docs/zh-CN/sql-reference/sql-functions/bitmap-functions/bitmap_and_not_count.md
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@@ -0,0 +1,48 @@
+---
+{
+ "title": "bitmap_and_not_count",
+ "language": "zh-CN"
+}
+---
+
+<!--
+Licensed to the Apache Software Foundation (ASF) under one
+or more contributor license agreements. See the NOTICE file
+distributed with this work for additional information
+regarding copyright ownership. The ASF licenses this file
+to you under the Apache License, Version 2.0 (the
+"License"); you may not use this file except in compliance
+with the License. You may obtain a copy of the License at
+
+ http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing,
+software distributed under the License is distributed on an
+"AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+KIND, either express or implied. See the License for the
+specific language governing permissions and limitations
+under the License.
+-->
+
+# bitmap_and_not_count
+## description
+### Syntax
+
+`BITMAP BITMAP_AND_NOT_COUNT(BITMAP lhs, BITMAP rhs)`
+
+计算lhs减去两个输入bitmap的交集，返回新的bitmap的大小.
Review comment:
```suggestion
将两个bitmap进行与非操作并返回计算返回的大小.
```
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