Posted by Plamen Ratchev on 01/23/07 02:27

When you have UNION the columns in the first SELECT statement define the
datatype of the columns. The columns in the following SELECT statements must
match the datatype or be implicitly convertible. In your case implicit
conversion from varchar to float is allowed. Then the problem is that a
column in your first SELECT statement is of type float and the same column
in the second SELECT is a varchar, but the varchar column has some
characters that cannot be converted to float.

Without seeing the table definitions and just guessing it seems that your
_tblLeads.Zip might be of type float and tblClients.Zip is of type varchar.
Most likely tblClients.Zip has some invalid characters that cannot be
converted to float. One solution is to replace the column
[dbo].[_tblLeads].[Zip] in your first SELECT (if that is the correct column)
with an explicit conversion to varchar, like CAST([dbo].[_tblLeads].[Zip] AS
varchar). To be more precise you can convert to varchar(n) where n is the
exact size of the column.

Regards,

Plamen Ratchev
http://www.SQLStudio.com

[Back to original message]