Query giving compilation error

Question

hi,
i am confused that my query is working fine on back-end sqlplus, but as i put to use it in my form
at pre-form to know count, it gives compilation error;
sqlplus
SELECT COUNT(*) M_CNT1
FROM(
SELECT POH_CODE||'-'||POH_NO CODE,NVL(POH_FREIGHT_lc_amount,0)
-NVL((
SELECT SUM(FTH_LC_AMOUNT)
   FROM FIN_TXN_HEADER
  WHERE FTH_REF_CODE = POH_CODE
    AND FTH_REF_NO = POH_NO
    AND FTH_ACNT_CODE = 'AC1009'
  GROUP BY FTH_REF_CODE,FTH_REF_NO),0) NET, POH_CODE, POH_NO
FROM PURCHASE_ORDER_HEADEr
WHERE NVL(POH_FREIGHT_LC_AMOUNT,0) > 0);
    M_CNT1
         1
in pre-form
declare
m_cnt1 number;
BEGIN
SELECT COUNT(*) INTO M_CNT1
FROM(
SELECT NVL(POH_FREIGHT_lc_amount,0)
-NVL((
SELECT SUM(FTH_LC_AMOUNT)
   FROM FIN_TXN_HEADER
  WHERE FTH_REF_CODE = POH_CODE
    AND FTH_REF_NO = POH_NO
    AND FTH_ACNT_CODE = 'AC1009'
  GROUP BY FTH_REF_CODE,FTH_REF_NO),0) NET
FROM PURCHASE_ORDER_HEADER
WHERE NVL(POH_FREIGHT_LC_AMOUNT,0) > 0);
END;return error;
Error 103 at line 11, column 2
Encountered the symbol "SELECT" when expecting on of the following:
( - + mod not null others<an identifier>
<a double-quoted delimited-identifier> <a bind variable> avg
count current exists max min prior sql stddev sum variance
cast<a string literal with character se specification>
<a number> <a single-quoted SQL string>
Error 103 at line 16, column 36
Encountered the symbol "," when expecting on of the following:
) intersect minus union
i think the problem is continuation line or single quote.
what is it can anybody help me please? tyvm.

Answer 1

>
Error is in this line.
Use : before M_CNT1hi Navneet,
m_cnt1 is neither a db-or-a-non-db-block item.
so how come i used : sign before m_cnt1.
i guess the problem is below sonewhere may be,
-NVL((
SELECT SUM(FTH_LC_AMOUNT)       --- line 11
                     OR
  GROUP BY FTH_REF_CODE,FTH_REF_NO),0) NET    --line 16