I have a union clause like this:

DECLARE @NoSite Integer
DECLARE @NoSite2 Integer
DECLARE @Enabled Bit
DECLARE @NoSite3 Integer
DECLARE @Enabled2 Bit
DECLARE @NoSite4 Integer
DECLARE @Enabled3 Bit
DECLARE @NoSite5 Integer
DECLARE @NoSite6 Integer

SET @NoSite=2
SET @NoSite2=2
SET @Enabled=1
SET @NoSite3=2
SET @Enabled2=1
SET @NoSite4=2
SET @Enabled3=1
SET @NoSite5=2
SET @NoSite6=2

SELECT TOP 40 News.Title_E,News.Title_F,News.Url,News.AddDate AS Date,News.Url2,1 AS Type,
News.NoSite,'' AS Title2
FROM News WHERE News.NoSite=@NoSite
UNION
SELECT TOP 40 Event.Title AS Title_E,Event.Title AS Title_F,Event.Url,Event.AddDate AS Date,
convert(char(74),'') AS Url2,2 AS Type,Event.NoSite,'' AS Title2
FROM Event
LEFT JOIN Province ON Event.NoProvince=Province.Numero
WHERE Event.NoSite=@NoSite2 AND Event.Enabled=@Enabled

I obtain "The text data type cannot be selected as DISTINCT because it is not comparable.". This is in regards to the syntax where the Url2 field does not exist in the Event table. What would be the proper syntax to have a union with the Event table considering that News.Url2 is char(74)?