Basic report programming

Question

i am new to SAP.
please provide information abt report programming like what are the basic things we have to remember while writing a report program.please provide any link which gives basic information abt report programming with some hands-on practice.

Answer 1

hii amar,
Report programming is a simple abap program which deals with presentation of the output to the client.
Report is generally designed when we want to have the output on the screen in a particular manner..
Report has many things attached to it like alv etc.
But basically reports are managed by events. The order of the events are as follows.
Initialization
At selection screen
Start of selection
End of selection
Top of page..
We write the code in these events and this will be executed sequentially. If u want any detailed thing in report. Do revert back.
for eg. in the following code:
*& Report  Z_84083_REP                                                 *
REPORT  z_84083_rep NO STANDARD PAGE HEADING LINE-SIZE 150.
*MESSAGE-ID z_84083_msg.
**********************Database Tables*********************************
TABLES: z84083_train,Z84083_BOOKING.
**************************Selection Screen***************************
SELECTION-SCREEN BEGIN OF BLOCK b1 WITH FRAME TITLE text-t01.
SELECT-OPTIONS: trnno FOR z84083_train-train_no NO INTERVALS.
PARAMETERS: from_st TYPE z84083_train-from_stn,
            to-st TYPE z84083_train-to_stn.
SELECTION-SCREEN END OF BLOCK b1.
*************************Internal Table*******************************
DATA: BEGIN OF itab OCCURS 10,
      trainno TYPE z84083_train-train_no,
      trainname TYPE z84083_train-train_name,
      fromstn TYPE z84083_train-from_stn,
      tostn TYPE z84083_train-to_stn,
      TOTT TYPE z84083_train-TOTAL_TKTS,
END OF itab.
*************************Headings*******************************
DATA:
    h1(10) TYPE c VALUE 'Train No',
    h2(20) TYPE c VALUE 'Train Name',
    h3(20) TYPE c VALUE 'From Stn',
    h4(20) TYPE c VALUE 'To Stn'.
  DATA : FLD(25) TYPE C,
        VAL TYPE  z89297_train-trainno.
*************************Report Headings****************************
TOP-OF-PAGE.
  WRITE: 'REQUESTER : Rahul Dwivedi',
         114'PAGE   :',sy-pagno.
  WRITE:/ 'PROGRAM : TRAIN REPORT',
          114'DATE :',sy-datum.
  SKIP 1.
  WRITE 60'TRAIN RESERVATION REPORT' COLOR 6 INVERSE ON INTENSIFIED ON.
  SKIP 1.
  ULINE.
END-OF-PAGE.
  ULINE.
*******************Defining the Start Of Selection event*************
START-OF-SELECTION.
  PERFORM fetch.
END-OF-SELECTION.
*******************CALLING THE DISPLAY FUNCTION
  perfORm display.
  AT LINE-SELECTION.
  IF sy-lsind = 1.
  GET CURSOR FIELD fld VALUE val.
   IF fld = 'ITAB-TRAINNO'.
   SET PARAMETER ID 'PID' FIELD ITAB-TRAINNO.
   SET PARAMETER ID 'PID1' FIELD ITAB-TRAINNAME.
         call transaction 'Z84083_TRANS'.
   Endif.
ENDIF.
*&      Form  fetch
      text
FORM fetch.
  SELECT TRAIN_NO TRAIN_NAME FROM_STN TO_STN TOTAL_TKTS FROM
z84083_train
    AS t INTO TABLE itab WHERE
    train_no IN trnno AND
    from_stn = from_st AND
    to_stn = to-st.
   SELECT NO_BD NO_AV FROM Z84083_BOOKING INTO TABLE ITAB1 WHERE
   TRAIN_NO IN TRNNO.
ENDFORM.                    "fetch
*&      Form  DISPLAY
      text
FORM display.
  ULINE.
    FORMAT COLOR 3 INVERSE OFF.
    WRITE:/ h1,'|',h2,'|',h3,'|',h4,'|'.
    ULINE.
    FORMAT COLOR 2 INVERSE OFF.
     LOOP AT ITAB.
      FORMAT HOTSPOT ON.
      WRITE: /(10) ITAB-TRAINNO UNDER h1,'|'.
      HIDE ITAB-TRAINNO.
      FORMAT HOTSPOT OFF.
WRITE: (20) ITAB-trainname UNDER h2,'|',
       (20) ITAB-fromstn UNDER h3,'|',
       (20) ITAB-toSTN UNDER h4,'|'.
    ENDLOOP.
    ULINE.
ENDFORM.
      u go thru the program and understand the hierarchy of the various events.