Question

So I established a connection from my SQL Server 2008 Express Edition to our Oracle Database.
When I query varchar based values, it is fine, but for any numeric value, it throws me an error like this one.

Msg 9803, Level 16, State 1, Line 1
Invalid data for type "numeric".

How do I get around this?

Answer 1

I’ve run into this myself. Your error is caused by Number fields not being properly handled by the linkage. The easiest fix is to cast to a varchar inside your OPENQUERY, and to cast back to a number on the other side

SELECT CONVERT(INT, YourField ) AS YourField   
FROM OPENQUERY (LINKEDSERVER, 
'SELECT TO_CHAR(YourField ) AS YourField FROM RemoteTable');