主题表
CREATE TABLE [dbo].[BS_Subject](
[SubjectID] [bigint] IDENTITY(1,1) NOT NULL,
[DepartmentID] [bigint] NOT NULL,
[SubjectName] [varchar](50) NOT NULL,
[SubjectDescription] [varchar](100) NULL,
[SubjectShortCode] [varchar](10) NOT NULL,
CONSTRAINT [PK_Subject] PRIMARY KEY CLUSTERED
(
[SubjectID] ASC
)
SubjectToClass表
CREATE TABLE [dbo].[BS_SubjectToClass](
[SubjectToClassID] [bigint] IDENTITY(1,1) NOT NULL,
[SubjectID] [bigint] NOT NULL,
[ClassID] [bigint] NOT NULL,
CONSTRAINT [PK_BS_SubjectToClass] PRIMARY KEY CLUSTERED
(
[SubjectToClassID] ASC
)
我需要列出Subject
表中subjectid
不在指定类的SubjectToClass
表中的所有行。
我有这个,但无法继续下去
select Distinct(BS_Subject.SubjectID) DepartmentID,
SubjectName, SubjectDescription, SubjectShortCode
from dbo.BS_Subject
where BS_Subject.SubjectID <> (
SELECT Distinct(BS_Subject.SubjectID)
FROM dbo.BS_Subject, dbo.BS_SubjectToClass
Where BS_Subject.SubjectID = BS_SubjectToClass.SubjectID
And BS_SubjectToClass.ClassID = 2)
答案 0 :(得分:35)
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)
答案 1 :(得分:11)
您需要使用NOT IN
运算符 - 而不是<>
(那是VB或其他......)
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)