T-SQL: How to Select Values in Value List that are NOT IN the Table?

Question

I have a list of e-mail addresses, some of them are in my table, some of them are not. I want to select all e-mails from that list and whether they are in the table or not.

Answer 1

This Should work with all SQL versions.

SELECT  E.AccessCode ,
        CASE WHEN C.AccessCode IS NOT NULL THEN 'Exist'
             ELSE 'Not Exist'
        END AS [Status]
FROM    ( SELECT    '60552' AS AccessCode
          UNION ALL
          SELECT    '80630'
          UNION ALL
          SELECT    '1611'
          UNION ALL
          SELECT    '0000'
        ) AS E
        LEFT OUTER JOIN dbo.Credentials C ON E.AccessCode = c.AccessCode