BP UDF query with OPOR and OPCH

Question

I need help in making this query better:
SELECT DisTinct T2.DocNum PO#,
T2.U_POCUST,
T2.U_CUSTPONM,
T2.U_BLANKETPO,
T2.U_ETA,
T2.U_CONTAIN,
T2.U_SHIPCODE,
T0.DocNum as [A/P Res],
T0.CardName
from opch t0
INNER JOIN POR1 T1 ON T1.TrgetEntry=T0.DocEntry AND T1.TargetType = '18'
INNER JOIN OPOR T2 ON T2.DocEntry=T1.DocEntry
WHERE      T0.InvntSttus ='O'
I have to add from @SHIPCODE UDF U_URL, related to T2.U_SHIPCODE,
and from the BP 1 UDF: U_SALESREP
Can anyone help me with this? basically is to add the url link to my tracking query and to know who the sales rep is
Thank you very much,
Eddy

Answer 1

Here's the working Query after your suggestions:
SELECT DisTinct T2.DocNum PO#,
IsNull(T2.U_POCUST, '') 'PO Custom',
IsNull(T2.U_CUSTPONM, '') 'PO No.',
IsNull(T2.U_BLANKETPO, '') 'Blanket PO',
IsNull(T2.U_ETA, '') 'ETA',
IsNull(T2.U_CONTAIN, '') 'Container',
IsNull(T2.U_SHIPCODE, '') 'Ship Code',
T4.U_VENDOR 'ZZZ',
T0.DocNum as 'A/P Res',
T0.CardName,
T3.U_SALESREP 'Sales Rep'
from opch t0
INNER JOIN POR1 T1 ON T1.TrgetEntry=T0.DocEntry AND T1.TargetType = '18'
INNER JOIN OPOR T2 ON T2.DocEntry=T1.DocEntry
LEFT JOIN OCRD T3 ON T3.CardCode=T2.U_POCUST
LEFT JOIN [dbo].[@SHIPCODE] T4 On T4.Code=T2.U_SHIPCODE
WHERE T0.InvntSttus ='O'
Please, if I use T4.U_VENDOR 'ZZZ' it works perfect, but if I change to: T4.U_URL 'ZZZ' I get error:
1). [Microsoft][SQL Server Native Client 10.0][SQL Server]The ntext data type cannot be selected as DISTINCT because it is not comparable. 2). [Microsoft][SQL Server Native Client 10.0][SQL Server]Statement 'Service Contracts' (OCTR) (s) could not be prepared.
Why? What do I have to change?