HappenLee commented on code in PR #9867:
URL: https://github.com/apache/incubator-doris/pull/9867#discussion_r889651612
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docs/zh-CN/sql-manual/sql-functions/window-functions/WINDOW-FUNCTION-NTILE.md:
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@@ -0,0 +1,43 @@
+---
+{
+ "title": "WINDOW-FUNCTION-NTILE",
+ "language": "zh-CN"
+}
+---
+
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+
+ 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
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+
+## WINDOW FUNCTION NTILE
+### description
+
+将排序分区中的行划分为特定数量的组。从每个组分配一个从一开始的桶号。对于每一行， NTILE() 函数返回一个桶号，表示行所属的组。
Review Comment:
I don't even know the meaning `2` of parameter `ntile(2)` after reading the
doc. please add the meaning. what could happen if i call `ntile(0)` or
`ntile(null)`.
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