SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
IF NOT EXISTS (SELECT * FROM sys.objects WHERE object_id = OBJECT_ID (N'[dbo].[Depart]') AND type in (N'U'))
BEGIN
CREATE TABLE [dbo].[Depart](
    [departID] [int] IDENTITY(1,1) NOT NULL,
    [departName] [varchar](100) NULL,
 CONSTRAINT [PK_Depart] PRIMARY KEY CLUSTERED
(
    [departID] ASC
)WITH (IGNORE_DUP_KEY = OFF) ON [PRIMARY]
) ON [PRIMARY]
END
GO
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
IF NOT EXISTS (SELECT * FROM sys.objects WHERE object_id = OBJECT_ID (N'[dbo].[Users]')AND type in (N'U'))
BEGIN
CREATE TABLE [dbo].[Users](
    [adminName] [varchar](20) NOT NULL,
    [adminPwd] [varchar](20) NULL,
 CONSTRAINT [PK_Users] PRIMARY KEY CLUSTERED
(
    [adminName] ASC
)WITH (IGNORE_DUP_KEY = OFF) ON [PRIMARY]
) ON [PRIMARY]
END
GO
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
IF NOT EXISTS (SELECT * FROM sys.objects WHERE object_id = OBJECT_ID(N'[dbo].[Teacher]') AND type in (N'U'))
BEGIN
CREATE TABLE [dbo].[Teacher](
    [teaID] [varchar](20) NOT NULL,
    [teaPwd] [varchar](20) NULL,
    [teaName] [varchar](50) NOT NULL,
    [teaDepart] [int] NULL,
 CONSTRAINT [PK_Teacher] PRIMARY KEY CLUSTERED
(
    [teaID] ASC
)WITH (IGNORE_DUP_KEY = OFF) ON [PRIMARY]
) ON [PRIMARY]
END
GO
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
IF NOT EXISTS (SELECT * FROM sys.objects WHERE object_id = OBJECT_ID(N'[dbo].[Student]') AND type in (N'U'))
BEGIN

CREATE TABLE [dbo].[Student](
    [stuID] [varchar](20) NOT NULL,
    [stuPwd] [varchar](20) NULL,
    [stuName] [varchar](10) NOT NULL,
    [stuDepart] [int] NULL,
    [stuGrade] [int] NULL,
    [stuClass] [int] NULL,
 CONSTRAINT [PK_Student] PRIMARY KEY CLUSTERED
(
    [stuID] ASC
)WITH (IGNORE_DUP_KEY = OFF) ON [PRIMARY]
) ON [PRIMARY]
END
GO
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
IF NOT EXISTS (SELECT * FROM sys.objects WHERE object_id = OBJECT_ID(N'[dbo].[Cource]') AND type in (N'U'))
BEGIN

CREATE TABLE [dbo].[Cource](
    [courceID] [varchar](20) NOT NULL,
    [teaID] [varchar](20) NOT NULL,
    [courceName] [varchar](100) NOT NULL,
    [courceTime] [varchar](20) NULL,
    [courceAddress] [varchar](50) NULL,
    [courceInfo] [text] NULL,
 CONSTRAINT [PK_Cource_1] PRIMARY KEY CLUSTERED
(
    [courceID] ASC,
    [teaID] ASC
)WITH (IGNORE_DUP_KEY = OFF) ON [PRIMARY]
) ON [PRIMARY] TEXTIMAGE_ON [PRIMARY]
END
GO
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
IF NOT EXISTS (SELECT * FROM sys.objects WHERE object_id = OBJECT_ID(N'[dbo].[Elect]') AND type in (N'U'))
BEGIN

CREATE TABLE [dbo].[Elect](
    [stuID] [varchar](20) NOT NULL,
    [courceID] [varchar](20) NOT NULL,
    [teaID] [varchar](20) NOT NULL,
    [Score] [int] NULL,
 CONSTRAINT [PK_Elect] PRIMARY KEY CLUSTERED
(
    [stuID] ASC,
    [courceID] ASC,
    [teaID] ASC
)WITH (IGNORE_DUP_KEY = OFF) ON [PRIMARY]
) ON [PRIMARY]
END
GO
IF NOT EXISTS (SELECT * FROM 'sys.foreign_keys' WHERE object_id = OBJECT_ID(N'[dbo].[FK_Teacher_Depart]') AND parent_object_id = OBJECT_ID(N'[dbo].[Teacher]'))
ALTER TABLE [dbo].[Teacher]  WITH CHECK ADD  CONSTRAINT [FK_Teacher_Depart] FOREIGN KEY([teaDepart])
REFERENCES [dbo].[Depart] ([departID])
GO
IF NOT EXISTS (SELECT * FROM 'sys.foreign_keys' WHERE object_id = OBJECT_ID(N'[dbo].[FK_Student_Depart]') AND parent_object_id = OBJECT_ID(N'[dbo].[Student]'))
ALTER TABLE [dbo].[Student]  WITH CHECK ADD  CONSTRAINT [FK_Student_Depart] FOREIGN KEY([stuDepart])
REFERENCES [dbo].[Depart] ([departID])
GO
IF NOT EXISTS (SELECT * FROM 'sys.foreign_keys' WHERE object_id = OBJECT_ID(N'[dbo].[FK_Cource_Teacher]') AND parent_object_id = OBJECT_ID(N'[dbo].[Cource]'))
ALTER TABLE [dbo].[Cource]  WITH CHECK ADD  CONSTRAINT [FK_Cource_Teacher] FOREIGN KEY([teaID])
REFERENCES [dbo].[Teacher] ([teaID])
GO
IF NOT EXISTS (SELECT * FROM 'sys.foreign_keys' WHERE object_id = OBJECT_ID(N'[dbo].[FK_Elect_Cource]') AND parent_object_id = OBJECT_ID(N'[dbo].[Elect]'))
ALTER TABLE [dbo].[Elect]  WITH CHECK ADD  CONSTRAINT [FK_Elect_Cource] FOREIGN KEY([courceID], [teaID])
REFERENCES [dbo].[Cource] ([courceID], [teaID])
ON UPDATE CASCADE
ON DELETE CASCADE
GO
IF NOT EXISTS (SELECT * FROM 'sys.foreign_keys' WHERE object_id = OBJECT_ID(N'[dbo].[FK_Elect_Student]') AND parent_object_id = OBJECT_ID(N'[dbo].[Elect]'))
ALTER TABLE [dbo].[Elect]  WITH CHECK ADD  CONSTRAINT [FK_Elect_Student] FOREIGN KEY([stuID])
REFERENCES [dbo].[Student] ([stuID])
ON UPDATE CASCADE
ON DELETE CASCADE
GO
IF NOT EXISTS (SELECT * FROM 'sys.foreign_keys' WHERE object_id = OBJECT_ID(N'[dbo].[FK_Elect_Teacher]') AND parent_object_id = OBJECT_ID(N'[dbo].[Elect]'))
ALTER TABLE [dbo].[Elect]  WITH CHECK ADD  CONSTRAINT [FK_Elect_Teacher] FOREIGN KEY([teaID])
REFERENCES [dbo].[Teacher] ([teaID])

这是源码  请高手帮帮忙 ，正在做毕业设计   谢谢    急。。。。

你用的什么数据库啊?

没有问题啊！！！只要把'sys.foreign_keys'的引号去掉即可。