Here is what I would do. Of course, I would fine tune this depending on your needs. Make sure you test all of this.
1) Get the exact table name for the specific app group-
db2 => select arsag.name, arsseg.table_name from arsag, arsseg where arsag.agid=arsseg.agid and arsag.name='AGNAME'
NAME TABLE_NAME
------------------------------------------------------------ ------------------
AGNAME TBL1
2) get a listing of the date, plan, doc_name from the table, and use where clause with the date you choose (in the arsdate format..)
db2 => select rdate, plan , doc_name from TBL1 where rdate = '17840'
3) export to excel, apply some filters to remove duplicates. Then toss them in an arsadmin unload