Derived Column in Query

Question

Can somebody help me with this syntax? I am taking two working
queries and putting them together such that one becomes a
derived column in the other. I am guessing that I must just be
missing some small syntax point (I don't use Oracle much)
because this query runs fine in a SQL Server. I thought I had
gotten all the syntax converted, but I'm getting an error: "ORA-
00936: Missing Expression". Here's the statement:
SELECT A.CNTRCT_ID, A.VENDOR_ID,
(Select X.XLATSHORTNAME
From Sysadm.XLATTABLE X
WHERE X.EFFDT =
( SELECT MAX(EFFDT)
FROM Sysadm.XLATTABLE
WHERE X.FIELDNAME = FIELDNAME AND X.LANGUAGE_CD =
LANGUAGE_CD AND X.FIELDVALUE = FIELDVALUE
AND EFFDT <= TO_DATE('12/26/2001','MM-DD-YY')
And X.FIELDNAME = 'CNTRCT_STATUS' And X.FIELDVALUE=
A.CNTRCT_STATUS
) as StatusExtended,
A.CNTRCT_BEGIN_DT, A.CNTRCT_EXPIRE_DT, A.DESCR, B.NAME1
FROM Sysadm.PS_CNTRCT_HDR A, Sysadm.PS_VENDOR B
WHERE A.Z_PURCH_DOC_TYPE = 'B' AND A.CNTRCT_STATUS <> 'C' AND
B.VENDOR_ID = A.VENDOR_ID AND B.SETID = A.VENDOR_SETID
AND A.CNTRCT_EXPIRE_DT BETWEEN TO_DATE('12/26/2001','MM/DD/YY')
AND TO_DATE('1/25/2002','MM/DD/YY')
Order By B.NAME1
Thanks for your help!

Answer 1

Your code runs O.K. in Oracle 8.1.7.  I don't have 8.0.4 to test
it on, but I suggest you try re-writing it something like below,
and see if it works:
SELECT   A.CNTRCT_ID,
         A.VENDOR_ID,
         A.CNTRCT_BEGIN_DT,
         A.CNTRCT_EXPIRE_DT,
         A.DESCR,
         B.NAME1,
         c.xlatshortname AS StatusExtended
FROM     sysadm.PS_CNTRCT_HDR A,
         sysadm.PS_VENDOR B,
         (Select X.XLATSHORTNAME, x.fieldvalue
          From   sysadm.XLATTABLE X
          WHERE  X.EFFDT =
                 (SELECT MAX (EFFDT)
                  FROM   sysadm.XLATTABLE
                  WHERE  X.FIELDNAME = FIELDNAME
                  AND    X.LANGUAGE_CD = LANGUAGE_CD
                  AND    X.FIELDVALUE = FIELDVALUE
                  AND    EFFDT <=
                         TO_DATE ('12/26/2001', 'MM/DD/YYYY'))
          And    X.FIELDNAME = 'CNTRCT_STATUS') c
WHERE    A.Z_PURCH_DOC_TYPE = 'B'
AND      A.CNTRCT_STATUS <> 'C'
AND      B.VENDOR_ID = A.VENDOR_ID
AND      B.SETID = A.VENDOR_SETID
AND      A.CNTRCT_EXPIRE_DT
         BETWEEN TO_DATE ('12/26/2001', 'MM/DD/YYYY')
         AND     TO_DATE ('01/25/2002', 'MM/DD/YYYY')
And      c.FIELDVALUE = A.CNTRCT_STATUS
Order By B.NAME1