[SQL] Problem with an Empty Column

[hidura]

Good Morning list, I am new in the PostgreSQL list, and i have a problem  
with a query because i have an empty column in a empty table and i compare  
this empty column with a column what have values in other table i use an  
LEFT OUTER JOIN and works well, but when i filled the empty table with data  
and compare again the query give me the same result than if the table was  
empty, here is the code of my query:
SELECT supplierbill_tbl.id
FROM supplierbill_tbl
LEFT OUTER JOIN agrouptransacc_tbl
ON supplierbill_tbl.id > agrouptransacc_tbl.splbillid
--
Diego I. Hidalgo D.