problems with SELECT query results

[Joshua <joshua(at)joshuaneil(dot)com>]

Hello,

I am new to this list and have been working with PostgreSQL since January.

Here is my problem, I hope someone here has some experience or can point 
me in the right direction. I am writing the following query for a C# 
program I am writing:

SELECT 'PV.LINEITEM:' || partnum || ',' || round(onhand) || ',' || 
round(qm5) || ',' || round(lsm4) || ',' || ',' || ',' || round(onorder) 
|| ',' || ',' || ',' || binone || ',' || ',' || round(backorderqty) || 
',' || ',' || round(onhold) || ',' || ',' || ',' || ',' || ',' || ',' || 
',' || round(qtyperjob) || ',' || round(ordermax) AS gmrim FROM slparts 
WHERE vendor LIKE 'CH%'

The query does work and I am getting results from the database. There 
are values for all 'partnum' in the database, however, the query results 
include blank fields here and there in between the returned records. Why 
am I receiving blank fields for 'gmrim'???? This absolutely defies logic 
and I cannot find any rhyme or reason for this problem. I cannot have 
any blank rows in the query, and again the database is completely 
populated with values.

Could someone give me an explanation or tell me why I am receiving blank 
rows here and there as a query result. If you need further clarification 
of this problem or have any questions for me to arrive at a conclusion 
please feel free to send them to me and I will be more than happy to 
open a dialog in order to solve this problem.

Thanks in advance for assistance.

Cordially,
Joshua Neil