What is drill down report

Question

hi
experts can u help me for this

Answer 1

nothing difference for interactive and drill down
i am giving a clear example so that u can clearly understand
in this example you have a mainreport REPORT1. From REPORT1 you
can drill down to REPORT2 and from REPORT2 you can drill down
to REPORT3.
Tip:     Use hotspots to fire the AT LINE-SELECTION event.
     When the cursor is over the hotspot, it cganges to a hand,
     and you just have to click on the hostspot, instead of
     double clicking.
Note:     To see how to recognize if the user has selected a valid line, take a look at
How to check if a valid line is selected before drill down.
START-OF-SELECTION.
Read data for REPORT1 into itab1
END-OF-SELECTION.
  PERFORM write_report1.
TOP-OF-PAGE.
Write list header for REPORT1
AT USER-COMMAND.
Respond when the user presses a function key
  CASE sy-ucomm.               
   WHEN 'REPORT2'.                
     PERFORM write_reprt2.  
   WHEN 'REPORT3'.                
     PERFORM write_reprt3.  
  ENDCASE.
AT LINE-SELECTION.                                                 
Istead of pressing a button can perform the same actions
as i AT USER-COMMAND, by double clicking a line 
sy-lsind contains the list level.
Each time an interactive list event occurs, sy-lsind is
automatically increased by 1.
At REPORT1 sy-lsin = 0
  CASE sy-lsind.                                                   
    WHEN 1.                                                        
       PERFORM write_reprt2.  
    WHEN 2.                                                        
       PERFORM write_reprt3.  
  ENDCASE.
TOP-OF-PAGE.
Write report header for report1 ( sy-lsind = 0 )
TOP-OF-PAGE DURING LINE-SELECTION.                       
Write report header for sub reports
   CASE sy-lsind.                                         
     WHEN 1.                                              
    Write report header for REPORT2.
     WHEN 2.                                              
    Write report header for REPORT3.
    ENDCASE.
FORM WRITE_REPORT1.   
   LOOP at itab1.
    write report1.......
    Hide keyfields used for the select statement of
    report2
      HIDE: itab1_year, itab1_month.
   ENDLOOP.      
ENDFORM.
FORM WRITE_REPORT2.   
   SELECT * FROM databasetable2 into itab2
      WHERE year   = itab1_year AND
            month  = itab1_month.
   LOOP at itab2.
    write report2 .......
    Hide keyfields used for the select statement of
    report3
      HIDE: itab2_carrid.
   ENDLOOP.      
ENDFORM.
FORM WRITE_REPORT3.   
   SELECT * FROM databasetable3 into itab3
      WHERE carrid   = itab2_carrid.
   LOOP at itab3.
    write report3 .......
    No need to hide keyfields, as further drill down is not
    possible
   ENDLOOP.      
ENDFORM.
regards
Giridhar