如何在sybase中进行性能优化的过程

Question

我正在开展一项任务，我需要优化或调整sybase中的过程。我之前没有做过这种事，所以任何人都可以帮助我..

我认为下面提到的程序部分需要花费太多时间 -

    DECLARE @lnTotalCount INT


  ---This returns 953 rows-----
   SELECT @lnTotalCount = COUNT(*) FROM 
          firstTable chksts


    SELECT @lnRecordCount = 1, @lnRowsProcessed =0
    WHILE @lnRecordCount <= @lnTotalCount
            BEGIN

            --  SET ROWCOUNT 1

              SELECT  @lcCKPY_REF_ID  = ckck.CKPY_REF_ID,
                @lnCKCK_SEQ_NO        = ckck.CKCK_SEQ_NO,
                @lcPYPY_ID            = ckck.PYPY_ID,
                @lnCKCK_CK_NO         = ckck.CKCK_CK_NO,
                @ldtCKCK_CASHED_DT    = ckck.CKCK_CASHED_DT,
                @ldtCKCK_PRINTED_DT   = ckck.CKCK_PRINTED_DT,
                @ldtCKCK_REISS_DT     = ckck.CKCK_REISS_DT,
                @lcCKCK_TYPE          = ckck.CKCK_TYPE,
                @lcCKCK_PAYEE_NAME    = ckck.CKCK_PAYEE_NAME,
                @lcCKCK_CURR_STS      = LTRIM(RTRIM(chksts.[TRANSACTION])),
                @lnCKST_SEQ_NO        = ckck.CKST_SEQ_NO,
                @lcCKCK_REISS_USUS_ID = ckck.CKCK_REISS_USUS_ID,
                @lnCKCK_LOCK_TOKEN    = ckck.CKCK_LOCK_TOKEN,
                @ldtATXR_SOURCE_ID    = ckck.ATXR_SOURCE_ID,
                @lnBPID_CK_NO         = chksts.SERIAL_NUMBER

              FROM
                 firstTable chksts,
                 secondTable ckck,
                 thirdTable bpid

              WHERE ckck.CKPY_REF_ID   = bpid.CKPY_REF_ID
                AND bpid.BPID_CK_NO    = chksts.SERIAL_NUMBER
                AND ckck.CKCK_SEQ_NO   = bpid.CKCK_SEQ_NO
                AND ckck.CKCK_CURR_STS IN ('03','X3') 
                AND chksts.ID = @lnRecordCount
 IF(@@ROWCOUNT<>0) /* 1.5 If-Else condition*/
          BEGIN  
          EXEC @lnRetCd = ABProcedure
                      NULL,
                      NULL,
                      @lcCKPY_REF_ID,
                      @lnCKCK_SEQ_NO,
                      @lcPYPY_ID,
                      @lnCKCK_CK_NO,
                      @ldtCKCK_CASHED_DT,
                      @ldtCKCK_PRINTED_DT,
                      @ldtCKCK_REISS_DT,
                      @lcCKCK_TYPE,
                      @lcCKCK_PAYEE_NAME,
                      @lcCKCK_CURR_STS,
                      @lnCKST_SEQ_NO,
                      @lcCKCK_REISS_USUS_ID,
                      @lnCKCK_LOCK_TOKEN,
                      @ldtATXR_SOURCE_ID

               SELECT @lnRowsProcessed = @lnRowsProcessed + @@ROWCOUNT
 SELECT @lnRecordCount = @lnRecordCount + 1

摘要：此过程有一个部分，它根据上面选择的值调用另一个过程（ABprocedure）....

任何改善表现的建议......此刻它需要超过5个小时...