I am using SQL Server 2008 Express. In the DB in question, there is only one schema: dbo.
If I run the following script:
CREATE UNIQUE INDEX IX_ClientSocialTypes_Cover
ON ClientSocialTypes(ClientID, SocialTypeClassID, [Source]) INCLUDE (URLID);
... it executes ok, but I cannot see the index when I go into DB Diagram and view the indexes for this table. Further, the "Includes" field is always grayed out, even when I specify non-clustered index (hence my use of a script).
Any ideas?