Select rows not in another table, SQL Server query

Question

Subject table

CREATE TABLE [dbo].[BS_Subject](
     [SubjectID] [bigint] IDENTITY(1,1) NOT NULL,
     [DepartmentID] [bigint] NOT NULL,
     [SubjectName] [v         


        

Answer 1

SELECT SubjectID, DepartmentID, SubjectName, SubjectDescription, SubjectShortCode
FROM BS_Subject 
WHERE NOT EXISTS 
(SELECT SubjectToClassID FROM BS_SubjectToClass WHERE 
BS_Subject.SubjectID = BS_SubjectToClass.SubjectID
AND BS_SubjectToClass.ClassID =2)

Answer 2

You need to use the NOT IN operator - not the <> (that's VB or something....)

SELECT 
   DISTINCT(BS_Subject.SubjectID) DepartmentID, 
   SubjectName, SubjectDescription, SubjectShortCode
FROM dbo.BS_Subject
WHERE 
    BS_Subject.SubjectID NOT IN
       (SELECT DISTINCT(BS_Subject.SubjectID)
        FROM dbo.BS_Subject, dbo.BS_SubjectToClass
        WHERE BS_Subject.SubjectID = BS_SubjectToClass.SubjectID
        AND BS_SubjectToClass.ClassID = 2)