liaoxin01 commented on code in PR #13872:
URL: https://github.com/apache/doris/pull/13872#discussion_r1012864447


##########
docs/zh-CN/docs/data-operate/update-delete/sequence-column-manual.md:
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@@ -64,15 +64,24 @@ Sequence列建表时在property中增加了一个属性,用来标识`__DORIS_S
 
 **建表**
 
-创建Uniq表时,可以指定sequence列类型
+方法一:创建Uniq表时,可以指定sequence列到其他column的映射。
+
+```text
+PROPERTIES (
+    "function_column.sequence_col" = 'column_name',
+);
+```
+sequence_col用来指定sequence列到其他column的映射,该列可以为整型和时间类型(DATE、DATETIME),创建后不能更改该列的类型。导入时不用再指定映射列。如果设置了`function_column.sequence_col`,
 `function_column.sequence_type`将被忽略。
+
+方法二:创建Uniq表时,可以指定sequence列类型。

Review Comment:
   感觉可以先留着,原来的方式比较灵活,有些场景用户可以就要单独指定一列数据作为sequence列,先试用看看,逐步再去删掉原来的方案。



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