How to write Sync service in ABAP

Question

Dear Experts,
              i m very new to ABAP dev, can anybody help me how to write a sync service in ABAP and how to call a function module in to that sync service.
               My requirement is i want to upload the data from the clint and download the data to client from the backend. i had written the function module to create a customer in CRM, now i want to push the data to create a customer from the client, for this i need to write a sync service for above requirement,
            plz help me out how to write a sync service.
                       Regards
                        eswar

Answer 1

Hi Jyotirmoy,
Check this thread for Subquery
http://help.sap.com/saphelp_nw04/helpdata/en/dc/dc7614099b11d295320000e8353423/content.htm
Correlated, non-scalar subquery:
REPORT demo_select_subquery_1.
DATA: name_tab TYPE TABLE OF scarr-carrname,
      name  LIKE LINE OF name_tab.
SELECT  carrname
  INTO  TABLE name_tab
  FROM  scarr
  WHERE EXISTS ( select  *
                   FROM  spfli
                   WHERE carrid   =  scarr~carrid AND
                         cityfrom = 'NEW YORK'        ).
LOOP AT name_tab INTO name.
  WRITE: / name.
ENDLOOP.
This example selects all lines from database table SCARR for airlines that fly from New York.
Scalar subquery:
REPORT demo_select_subquery_2.
DATA: carr_id TYPE spfli-carrid VALUE 'LH',
      conn_id TYPE spfli-connid VALUE '0400'.
DATA: city  TYPE sgeocity-city,
      lati  TYPE p DECIMALS 2,
      longi TYPE p DECIMALS 2.
SELECT  SINGLE city latitude longitude
  INTO  (city, lati, longi)
  FROM  sgeocity
  WHERE city IN ( select  cityfrom
                    FROM  spfli
                    WHERE carrid = carr_id AND
                          connid = conn_id      ).
WRITE: city, lati, longi.
This example reads the latitude and longitude of the departure city of flight LH 402 from database table SGEOCITY.
Thanks,
Vinay