yiguolei commented on code in PR #2670:
URL: https://github.com/apache/doris-website/pull/2670#discussion_r2235626328


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docs/sql-manual/sql-functions/aggregate-functions/avg.md:
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@@ -25,29 +25,97 @@ AVG([DISTINCT] <expr>)
 ## Return Value
 
 Returns the average value of the selected column or expression. If all records 
in the group are NULL, the function returns NULL.

Review Comment:
   如果有明确的返回值类型的,就直接标注出类型。 比如这个确定是double,那么就直接写出来返回值类型是double



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