What is the use of commit work and rollback work

hao friends,
what is the use of commitwork and rollback work where we can use these open sql statements .
thanks,
anji

hi all
i have written the following code in my development system to change the records of my database.
SELECT * FROM zyikostl INTO TABLE itab.
LOOP AT itab INTO wtab.
    tabix = sy-tabix.
    DO.
      READ TABLE itab INTO ktab WITH KEY kostl_alt = wtab-kostl_neu.
      IF sy-subrc = 0.
        wtab-kostl_neu = ktab-kostl_neu.
        MODIFY itab FROM wtab INDEX tabix.
        CONTINUE.
      ELSE.
        EXIT.
      ENDIF.
    ENDDO.
ENDLOOP.
MODIFY zyikostl FROM TABLE itab.
In the development system i have only few records its working fine,but when it is been moved to test system there are 2500 records in the database so the report is taking much time(more than 5 hours )
i sthere any solution for this ....
thanks,
vaasu.

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Hi,
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http://www.sapbrainsonline.com/TOOLS/SQLTRACE/SQL_TRACE.html
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http://help.sap.com/saphelp_erp2005vp/helpdata/en/43/cb632772cd0cd4e10000000a1553f7/frameset.htm
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* EXCEPTIONS
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form2x4
Edited by: mozam khan on Feb 24, 2009 9:15 AM

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What is the use of commit work and rollback work

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