cj-zhukov commented on code in PR #21021:
URL: https://github.com/apache/datafusion/pull/21021#discussion_r3308688299


##########
datafusion-examples/examples/dataframe/dataframe.rs:
##########
@@ -53,8 +55,10 @@ use tokio::fs::create_dir_all;
 ///
 /// * [write_out]: write out a DataFrame to a table, parquet file, csv file, 
or json file
 ///
-/// # Executing subqueries
+/// # Querying data
 ///
+/// * [aggregate_global_and_grouped]: global vs grouped aggregation (`select` 
vs `aggregate`)

Review Comment:
   That makes sense - I totally agree that the examples can be moved into a 
separate PR, especially since this one has already grown quite a bit.
   
   My motivation for adding them here was to provide some context and usage 
examples for the new functionality, but I’m happy to split them out to keep 
this PR more focused.
   



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