“SQL Server IsNull Função nem Conte de trabalho” Respostas de código

SQL Server IsNull Função nem Conte de trabalho

SELECT  FirstName, 
        LastName,
        IsNull((
            SELECT  COUNT(UP1.EmailAddress) AS HasEmail 
            From    dbo.UserProfiles AS UP1 
            WHERE   (NOT (UP1.EmailAddress IS NULL)) 
                    AND (CreatedBy = dbo.UserProfiles.UserID)
            GROUP BY CreatedBy), 0) AS EmailEnteredCount 
FROM    dbo.UserProfiles 
WHERE   (IsStaff = 1)