Could you add some example about this document? Thanks`1

[??????]

Dear Mr  Timo Walther:


I'm learing  document  and have send 3 mails about
executeinsert/flataggregate/GroupBy Window Aggregation from the 
document  
to 
user@flink.apache.org
each of which is provided with full code,but no replies.


I found
the authors of above 3 parts are NOT in the mailing list 
Of course I understand they are very busy now.


Could you add some completed examples(java style) of above 3 parts in flink 
github?


Much Thanks for your help.