文档章节

前言 -- 数据库准备、一些名词准备

月影南溪
 月影南溪
发布于 2015/10/20 11:01
字数 3876
阅读 57
收藏 0

前言

      本系列整理自EF 实体框架入门

数据库准备

       该系列用到的数据库为 school,使用SQL Server。如果没有安装,可以使用VS附带的SQL Express。步骤省略,不清楚的可以使用“靠谱的”搜索引擎查找。

       SQL脚本:

SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
-- 创建 Department 表。
IF NOT EXISTS (SELECT * FROM sys.objects
WHERE object_id = OBJECT_ID(N'[dbo].[Department]')
AND type in (N'U'))
BEGIN
CREATE TABLE [dbo].[Department](
[DepartmentID] [int] NOT NULL,
[Name] [nvarchar](50) NOT NULL,
[Budget] [money] NOT NULL,
[StartDate] [datetime] NOT NULL,
[Administrator] [int] NULL,
CONSTRAINT [PK_Department] PRIMARY KEY CLUSTERED
(
[DepartmentID] ASC
)WITH (IGNORE_DUP_KEY = OFF) ON [PRIMARY]
) ON [PRIMARY]
END
GO
-- 创建 Person 表。
IF NOT EXISTS (SELECT * FROM sys.objects
WHERE object_id = OBJECT_ID(N'[dbo].[Person]')
AND type in (N'U'))
BEGIN
CREATE TABLE [dbo].[Person](
[PersonID] [int] IDENTITY(1,1) NOT NULL,
[LastName] [nvarchar](50) NOT NULL,
[FirstName] [nvarchar](50) NOT NULL,
[HireDate] [datetime] NULL,
[EnrollmentDate] [datetime] NULL,
[Discriminator] [nvarchar](50) NOT NULL,
CONSTRAINT [PK_School.Student] PRIMARY KEY CLUSTERED
(
[PersonID] ASC
)WITH (IGNORE_DUP_KEY = OFF) ON [PRIMARY]
) ON [PRIMARY]
END
GO
-- 创建 OnsiteCourse 表。
IF NOT EXISTS (SELECT * FROM sys.objects
WHERE object_id = OBJECT_ID(N'[dbo].[OnsiteCourse]')
AND type in (N'U'))
BEGIN
CREATE TABLE [dbo].[OnsiteCourse](
[CourseID] [int] NOT NULL,
[Location] [nvarchar](50) NOT NULL,
[Days] [nvarchar](50) NOT NULL,
[Time] [smalldatetime] NOT NULL,
CONSTRAINT [PK_OnsiteCourse] PRIMARY KEY CLUSTERED
(
[CourseID] ASC
)WITH (IGNORE_DUP_KEY = OFF) ON [PRIMARY]
) ON [PRIMARY]
END
GO
-- 创建 OnlineCourse 表。
IF NOT EXISTS (SELECT * FROM sys.objects
WHERE object_id = OBJECT_ID(N'[dbo].[OnlineCourse]')
AND type in (N'U'))
BEGIN
CREATE TABLE [dbo].[OnlineCourse](
[CourseID] [int] NOT NULL,
[URL] [nvarchar](100) NOT NULL,
CONSTRAINT [PK_OnlineCourse] PRIMARY KEY CLUSTERED
(
[CourseID] ASC
)WITH (IGNORE_DUP_KEY = OFF) ON [PRIMARY]
) ON [PRIMARY]
END
GO
-- 创建 StudentGrade 表。
IF NOT EXISTS (SELECT * FROM sys.objects
WHERE object_id = OBJECT_ID(N'[dbo].[StudentGrade]')
AND type in (N'U'))
BEGIN
CREATE TABLE [dbo].[StudentGrade](
[EnrollmentID] [int] IDENTITY(1,1) NOT NULL,
[CourseID] [int] NOT NULL,
[StudentID] [int] NOT NULL,
[Grade] [decimal](3, 2) NULL,
CONSTRAINT [PK_StudentGrade] PRIMARY KEY CLUSTERED
(
[EnrollmentID] ASC
)WITH (IGNORE_DUP_KEY = OFF) ON [PRIMARY]
) ON [PRIMARY]
END
GO
-- 创建 CourseInstructor 表。
IF NOT EXISTS (SELECT * FROM sys.objects
WHERE object_id = OBJECT_ID(N'[dbo].[CourseInstructor]')
AND type in (N'U'))
BEGIN
CREATE TABLE [dbo].[CourseInstructor](
[CourseID] [int] NOT NULL,
[PersonID] [int] NOT NULL,
CONSTRAINT [PK_CourseInstructor] PRIMARY KEY CLUSTERED
(
[CourseID] ASC,
[PersonID] ASC
)WITH (IGNORE_DUP_KEY = OFF) ON [PRIMARY]
) ON [PRIMARY]
END
GO
-- 创建 Course 表。
IF NOT EXISTS (SELECT * FROM sys.objects
WHERE object_id = OBJECT_ID(N'[dbo].[Course]')
AND type in (N'U'))
BEGIN
CREATE TABLE [dbo].[Course](
[CourseID] [int] NOT NULL,
[Title] [nvarchar](100) NOT NULL,
[Credits] [int] NOT NULL,
[DepartmentID] [int] NOT NULL,
CONSTRAINT [PK_School.Course] PRIMARY KEY CLUSTERED
(
[CourseID] ASC
)WITH (IGNORE_DUP_KEY = OFF) ON [PRIMARY]
) ON [PRIMARY]
END
GO
-- 创建 OfficeAssignment 表。
IF NOT EXISTS (SELECT * FROM sys.objects
WHERE object_id = OBJECT_ID(N'[dbo].[OfficeAssignment]')
AND type in (N'U'))
BEGIN
CREATE TABLE [dbo].[OfficeAssignment](
[InstructorID] [int] NOT NULL,
[Location] [nvarchar](50) NOT NULL,
[Timestamp] [timestamp] NOT NULL,
CONSTRAINT [PK_OfficeAssignment] PRIMARY KEY CLUSTERED
(
[InstructorID] ASC
)WITH (IGNORE_DUP_KEY = OFF) ON [PRIMARY]
) ON [PRIMARY]
END
GO
-- 定义 OnsiteCourse 与 Course 之间的关系。
IF NOT EXISTS (SELECT * FROM sys.foreign_keys
WHERE object_id = OBJECT_ID(N'[dbo].[FK_OnsiteCourse_Course]')
AND parent_object_id = OBJECT_ID(N'[dbo].[OnsiteCourse]'))
ALTER TABLE [dbo].[OnsiteCourse] WITH CHECK ADD
CONSTRAINT [FK_OnsiteCourse_Course] FOREIGN KEY([CourseID])
REFERENCES [dbo].[Course] ([CourseID])
GO
ALTER TABLE [dbo].[OnsiteCourse] CHECK
CONSTRAINT [FK_OnsiteCourse_Course]
GO
-- 定义 OnlineCourse 与 Course 之间的关系。
IF NOT EXISTS (SELECT * FROM sys.foreign_keys
WHERE object_id = OBJECT_ID(N'[dbo].[FK_OnlineCourse_Course]')
AND parent_object_id = OBJECT_ID(N'[dbo].[OnlineCourse]'))
ALTER TABLE [dbo].[OnlineCourse] WITH CHECK ADD
CONSTRAINT [FK_OnlineCourse_Course] FOREIGN KEY([CourseID])
REFERENCES [dbo].[Course] ([CourseID])
GO
ALTER TABLE [dbo].[OnlineCourse] CHECK
CONSTRAINT [FK_OnlineCourse_Course]
GO
-- 定义 StudentGrade 与 Course 之间的关系。
IF NOT EXISTS (SELECT * FROM sys.foreign_keys
WHERE object_id = OBJECT_ID(N'[dbo].[FK_StudentGrade_Course]')
AND parent_object_id = OBJECT_ID(N'[dbo].[StudentGrade]'))
ALTER TABLE [dbo].[StudentGrade] WITH CHECK ADD
CONSTRAINT [FK_StudentGrade_Course] FOREIGN KEY([CourseID])
REFERENCES [dbo].[Course] ([CourseID])
GO
ALTER TABLE [dbo].[StudentGrade] CHECK
CONSTRAINT [FK_StudentGrade_Course]
GO
-- 定义 StudentGrade 与 Student 之间的关系。
IF NOT EXISTS (SELECT * FROM sys.foreign_keys
WHERE object_id = OBJECT_ID(N'[dbo].[FK_StudentGrade_Student]')
AND parent_object_id = OBJECT_ID(N'[dbo].[StudentGrade]'))
ALTER TABLE [dbo].[StudentGrade] WITH CHECK ADD
CONSTRAINT [FK_StudentGrade_Student] FOREIGN KEY([StudentID])
REFERENCES [dbo].[Person] ([PersonID])
GO
ALTER TABLE [dbo].[StudentGrade] CHECK
CONSTRAINT [FK_StudentGrade_Student]
GO
-- 定义 CourseInstructor 与 Course 之间的关系。
IF NOT EXISTS (SELECT * FROM sys.foreign_keys
WHERE object_id = OBJECT_ID(N'[dbo].[FK_CourseInstructor_Course]')
AND parent_object_id = OBJECT_ID(N'[dbo].[CourseInstructor]'))
ALTER TABLE [dbo].[CourseInstructor] WITH CHECK ADD
CONSTRAINT [FK_CourseInstructor_Course] FOREIGN KEY([CourseID])
REFERENCES [dbo].[Course] ([CourseID])
GO
ALTER TABLE [dbo].[CourseInstructor] CHECK
CONSTRAINT [FK_CourseInstructor_Course]
GO
-- 定义 CourseInstructor 与 Person 之间的关系。
IF NOT EXISTS (SELECT * FROM sys.foreign_keys
WHERE object_id = OBJECT_ID(N'[dbo].[FK_CourseInstructor_Person]')
AND parent_object_id = OBJECT_ID(N'[dbo].[CourseInstructor]'))
ALTER TABLE [dbo].[CourseInstructor] WITH CHECK ADD
CONSTRAINT [FK_CourseInstructor_Person] FOREIGN KEY([PersonID])
REFERENCES [dbo].[Person] ([PersonID])
GO
ALTER TABLE [dbo].[CourseInstructor] CHECK
CONSTRAINT [FK_CourseInstructor_Person]
GO
-- 定义 Course 与 Department 之间的关系。
IF NOT EXISTS (SELECT * FROM sys.foreign_keys
WHERE object_id = OBJECT_ID(N'[dbo].[FK_Course_Department]')
AND parent_object_id = OBJECT_ID(N'[dbo].[Course]'))
ALTER TABLE [dbo].[Course] WITH CHECK ADD
CONSTRAINT [FK_Course_Department] FOREIGN KEY([DepartmentID])
REFERENCES [dbo].[Department] ([DepartmentID])
GO
ALTER TABLE [dbo].[Course] CHECK CONSTRAINT [FK_Course_Department]
GO
-- 定义 OfficeAssignment 与 Person 之间的关系。
IF NOT EXISTS (SELECT * FROM sys.foreign_keys
WHERE object_id = OBJECT_ID(N'[dbo].[FK_OfficeAssignment_Person]')
AND parent_object_id = OBJECT_ID(N'[dbo].[OfficeAssignment]'))
ALTER TABLE [dbo].[OfficeAssignment] WITH CHECK ADD
CONSTRAINT [FK_OfficeAssignment_Person] FOREIGN KEY([InstructorID])
REFERENCES [dbo].[Person] ([PersonID])
GO
ALTER TABLE [dbo].[OfficeAssignment] CHECK
CONSTRAINT [FK_OfficeAssignment_Person]
GO
-- 创建 InsertOfficeAssignment 存储过程。
IF NOT EXISTS (SELECT * FROM sys.objects
WHERE object_id = OBJECT_ID(N'[dbo].[InsertOfficeAssignment]')
AND type in (N'P', N'PC'))
BEGIN
EXEC dbo.sp_executesql @statement = N'
CREATE PROCEDURE [dbo].[InsertOfficeAssignment]
@InstructorID int,
@Location nvarchar(50)
AS
INSERT INTO dbo.OfficeAssignment (InstructorID, Location)
VALUES (@InstructorID, @Location);
IF @@ROWCOUNT > 0
BEGIN
SELECT [Timestamp] FROM OfficeAssignment
WHERE InstructorID=@InstructorID;
END
'
END
GO
-- 创建 UpdateOfficeAssignment 存储过程。
IF NOT EXISTS (SELECT * FROM sys.objects
WHERE object_id = OBJECT_ID(N'[dbo].[UpdateOfficeAssignment]')
AND type in (N'P', N'PC'))
BEGIN
EXEC dbo.sp_executesql @statement = N'
CREATE PROCEDURE [dbo].[UpdateOfficeAssignment]
@InstructorID int,
@Location nvarchar(50),
@OrigTimestamp timestamp
AS
UPDATE OfficeAssignment SET Location=@Location
WHERE InstructorID=@InstructorID AND [Timestamp]=@OrigTimestamp;
IF @@ROWCOUNT > 0
BEGIN
SELECT [Timestamp] FROM OfficeAssignment
WHERE InstructorID=@InstructorID;
END
'
END
GO
-- 创建 DeleteOfficeAssignment 存储过程。
IF NOT EXISTS (SELECT * FROM sys.objects
WHERE object_id = OBJECT_ID(N'[dbo].[DeleteOfficeAssignment]')
AND type in (N'P', N'PC'))
BEGIN
EXEC dbo.sp_executesql @statement = N'
CREATE PROCEDURE [dbo].[DeleteOfficeAssignment]
@InstructorID int
AS
DELETE FROM OfficeAssignment
WHERE InstructorID=@InstructorID;
'
END
GO
-- 创建 DeletePerson 存储过程。
IF NOT EXISTS (SELECT * FROM sys.objects
WHERE object_id = OBJECT_ID(N'[dbo].[DeletePerson]')
AND type in (N'P', N'PC'))
BEGIN
EXEC dbo.sp_executesql @statement = N'
CREATE PROCEDURE [dbo].[DeletePerson]
@PersonID int
AS
DELETE FROM Person WHERE PersonID = @PersonID;
'
END
GO
-- 创建 UpdatePerson 存储过程。
IF NOT EXISTS (SELECT * FROM sys.objects
WHERE object_id = OBJECT_ID(N'[dbo].[UpdatePerson]')
AND type in (N'P', N'PC'))
BEGIN
EXEC dbo.sp_executesql @statement = N'
CREATE PROCEDURE [dbo].[UpdatePerson]
@PersonID int,
@LastName nvarchar(50),
@FirstName nvarchar(50),
@HireDate datetime,
@EnrollmentDate datetime,
@Discriminator nvarchar(50)
AS
UPDATE Person SET LastName=@LastName,
FirstName=@FirstName,
HireDate=@HireDate,
EnrollmentDate=@EnrollmentDate,
Discriminator=@Discriminator
WHERE PersonID=@PersonID;
'
END
GO
-- 创建 InsertPerson 存储过程。
IF NOT EXISTS (SELECT * FROM sys.objects
WHERE object_id = OBJECT_ID(N'[dbo].[InsertPerson]')
AND type in (N'P', N'PC'))
BEGIN
EXEC dbo.sp_executesql @statement = N'
CREATE PROCEDURE [dbo].[InsertPerson]
@LastName nvarchar(50),
@FirstName nvarchar(50),
@HireDate datetime,
@EnrollmentDate datetime,
@Discriminator nvarchar(50)
AS
INSERT INTO dbo.Person (LastName,
FirstName,
HireDate,
EnrollmentDate,
Discriminator)
VALUES (@LastName,
@FirstName,
@HireDate,
@EnrollmentDate,
@Discriminator);
SELECT SCOPE_IDENTITY() as NewPersonID;
'
END
GO
-- 创建 GetStudentGrades 存储过程。
IF NOT EXISTS (SELECT * FROM sys.objects
WHERE object_id = OBJECT_ID(N'[dbo].[GetStudentGrades]')
AND type in (N'P', N'PC'))
BEGIN
EXEC dbo.sp_executesql @statement = N'
CREATE PROCEDURE [dbo].[GetStudentGrades]
@StudentID int
AS
SELECT EnrollmentID, Grade, CourseID, StudentID FROM dbo.StudentGrade
WHERE StudentID = @StudentID
'
END
GO
-- 创建 GetDepartmentName 存储过程。
IF NOT EXISTS (SELECT * FROM sys.objects
WHERE object_id = OBJECT_ID(N'[dbo].[GetDepartmentName]')
AND type in (N'P', N'PC'))
BEGIN
EXEC dbo.sp_executesql @statement = N'
CREATE PROCEDURE [dbo].[GetDepartmentName]
@ID int,
@Name nvarchar(50) OUTPUT
AS
SELECT @Name = Name FROM Department
WHERE DepartmentID = @ID
'
END
GO
-- 将数据插到 Person 表中。
USE School
GO
SET IDENTITY_INSERT dbo.Person ON
GO
INSERT INTO dbo.Person (PersonID, LastName, FirstName, HireDate, EnrollmentDate, Discriminator)
VALUES (1, 'Abercrombie', 'Kim', '1995-03-11', null, 'Instructor');
INSERT INTO dbo.Person (PersonID, LastName, FirstName, HireDate, EnrollmentDate, Discriminator)
VALUES (2, 'Barzdukas', 'Gytis', null, '2005-09-01', 'Student');
INSERT INTO dbo.Person (PersonID, LastName, FirstName, HireDate, EnrollmentDate, Discriminator)
VALUES (3, 'Justice', 'Peggy', null, '2001-09-01', 'Student');
INSERT INTO dbo.Person (PersonID, LastName, FirstName, HireDate, EnrollmentDate, Discriminator)
VALUES (4, 'Fakhouri', 'Fadi', '2002-08-06', null, 'Instructor');
INSERT INTO dbo.Person (PersonID, LastName, FirstName, HireDate, EnrollmentDate, Discriminator)
VALUES (5, 'Harui', 'Roger', '1998-07-01', null, 'Instructor');
INSERT INTO dbo.Person (PersonID, LastName, FirstName, HireDate, EnrollmentDate, Discriminator)
VALUES (6, 'Li', 'Yan', null, '2002-09-01', 'Student');
INSERT INTO dbo.Person (PersonID, LastName, FirstName, HireDate, EnrollmentDate, Discriminator)
VALUES (7, 'Norman', 'Laura', null, '2003-09-01', 'Student');
INSERT INTO dbo.Person (PersonID, LastName, FirstName, HireDate, EnrollmentDate, Discriminator)
VALUES (8, 'Olivotto', 'Nino', null, '2005-09-01', 'Student');
INSERT INTO dbo.Person (PersonID, LastName, FirstName, HireDate, EnrollmentDate, Discriminator)
VALUES (9, 'Tang', 'Wayne', null, '2005-09-01', 'Student');
INSERT INTO dbo.Person (PersonID, LastName, FirstName, HireDate, EnrollmentDate, Discriminator)
VALUES (10, 'Alonso', 'Meredith', null, '2002-09-01', 'Student');
INSERT INTO dbo.Person (PersonID, LastName, FirstName, HireDate, EnrollmentDate, Discriminator)
VALUES (11, 'Lopez', 'Sophia', null, '2004-09-01', 'Student');
INSERT INTO dbo.Person (PersonID, LastName, FirstName, HireDate, EnrollmentDate, Discriminator)
VALUES (12, 'Browning', 'Meredith', null, '2000-09-01', 'Student');
INSERT INTO dbo.Person (PersonID, LastName, FirstName, HireDate, EnrollmentDate, Discriminator)
VALUES (13, 'Anand', 'Arturo', null, '2003-09-01', 'Student');
INSERT INTO dbo.Person (PersonID, LastName, FirstName, HireDate, EnrollmentDate, Discriminator)
VALUES (14, 'Walker', 'Alexandra', null, '2000-09-01', 'Student');
INSERT INTO dbo.Person (PersonID, LastName, FirstName, HireDate, EnrollmentDate, Discriminator)
VALUES (15, 'Powell', 'Carson', null, '2004-09-01', 'Student');
INSERT INTO dbo.Person (PersonID, LastName, FirstName, HireDate, EnrollmentDate, Discriminator)
VALUES (16, 'Jai', 'Damien', null, '2001-09-01', 'Student');
INSERT INTO dbo.Person (PersonID, LastName, FirstName, HireDate, EnrollmentDate, Discriminator)
VALUES (17, 'Carlson', 'Robyn', null, '2005-09-01', 'Student');
INSERT INTO dbo.Person (PersonID, LastName, FirstName, HireDate, EnrollmentDate, Discriminator)
VALUES (18, 'Zheng', 'Roger', '2004-02-12', null, 'Instructor');
INSERT INTO dbo.Person (PersonID, LastName, FirstName, HireDate, EnrollmentDate, Discriminator)
VALUES (19, 'Bryant', 'Carson', null, '2001-09-01', 'Student');
INSERT INTO dbo.Person (PersonID, LastName, FirstName, HireDate, EnrollmentDate, Discriminator)
VALUES (20, 'Suarez', 'Robyn', null, '2004-09-01', 'Student');
INSERT INTO dbo.Person (PersonID, LastName, FirstName, HireDate, EnrollmentDate, Discriminator)
VALUES (21, 'Holt', 'Roger', null, '2004-09-01', 'Student');
INSERT INTO dbo.Person (PersonID, LastName, FirstName, HireDate, EnrollmentDate, Discriminator)
VALUES (22, 'Alexander', 'Carson', null, '2005-09-01', 'Student');
INSERT INTO dbo.Person (PersonID, LastName, FirstName, HireDate, EnrollmentDate, Discriminator)
VALUES (23, 'Morgan', 'Isaiah', null, '2001-09-01', 'Student');
INSERT INTO dbo.Person (PersonID, LastName, FirstName, HireDate, EnrollmentDate, Discriminator)
VALUES (24, 'Martin', 'Randall', null, '2005-09-01', 'Student');
INSERT INTO dbo.Person (PersonID, LastName, FirstName, HireDate, EnrollmentDate, Discriminator)
VALUES (25, 'Kapoor', 'Candace', '2001-01-15', null, 'Instructor');
INSERT INTO dbo.Person (PersonID, LastName, FirstName, HireDate, EnrollmentDate, Discriminator)
VALUES (26, 'Rogers', 'Cody', null, '2002-09-01', 'Student');
INSERT INTO dbo.Person (PersonID, LastName, FirstName, HireDate, EnrollmentDate, Discriminator)
VALUES (27, 'Serrano', 'Stacy', '1999-06-01', null, 'Instructor');
INSERT INTO dbo.Person (PersonID, LastName, FirstName, HireDate, EnrollmentDate, Discriminator)
VALUES (28, 'White', 'Anthony', null, '2001-09-01', 'Student');
INSERT INTO dbo.Person (PersonID, LastName, FirstName, HireDate, EnrollmentDate, Discriminator)
VALUES (29, 'Griffin', 'Rachel', null, '2004-09-01', 'Student');
INSERT INTO dbo.Person (PersonID, LastName, FirstName, HireDate, EnrollmentDate, Discriminator)
VALUES (30, 'Shan', 'Alicia', null, '2003-09-01', 'Student');
INSERT INTO dbo.Person (PersonID, LastName, FirstName, HireDate, EnrollmentDate, Discriminator)
VALUES (31, 'Stewart', 'Jasmine', '1997-10-12', null, 'Instructor');
INSERT INTO dbo.Person (PersonID, LastName, FirstName, HireDate, EnrollmentDate, Discriminator)
VALUES (32, 'Xu', 'Kristen', '2001-7-23', null, 'Instructor');
INSERT INTO dbo.Person (PersonID, LastName, FirstName, HireDate, EnrollmentDate, Discriminator)
VALUES (33, 'Gao', 'Erica', null, '2003-01-30', 'Student');
INSERT INTO dbo.Person (PersonID, LastName, FirstName, HireDate, EnrollmentDate, Discriminator)
VALUES (34, 'Van Houten', 'Roger', '2000-12-07', null, 'Instructor');
GO
SET IDENTITY_INSERT dbo.Person OFF
GO
-- 将数据插到 Department 表中。
INSERT INTO dbo.Department (DepartmentID, [Name], Budget, StartDate, Administrator)
VALUES (1, 'Engineering', 350000.00, '2007-09-01', 2);
INSERT INTO dbo.Department (DepartmentID, [Name], Budget, StartDate, Administrator)
VALUES (2, 'English', 120000.00, '2007-09-01', 6);
INSERT INTO dbo.Department (DepartmentID, [Name], Budget, StartDate, Administrator)
VALUES (4, 'Economics', 200000.00, '2007-09-01', 4);
INSERT INTO dbo.Department (DepartmentID, [Name], Budget, StartDate, Administrator)
VALUES (7, 'Mathematics', 250000.00, '2007-09-01', 3);
GO
 
-- 将数据插到 Course 表中。
INSERT INTO dbo.Course (CourseID, Title, Credits, DepartmentID)
VALUES (1050, 'Chemistry', 4, 1);
INSERT INTO dbo.Course (CourseID, Title, Credits, DepartmentID)
VALUES (1061, 'Physics', 4, 1);
INSERT INTO dbo.Course (CourseID, Title, Credits, DepartmentID)
VALUES (1045, 'Calculus', 4, 7);
INSERT INTO dbo.Course (CourseID, Title, Credits, DepartmentID)
VALUES (2030, 'Poetry', 2, 2);
INSERT INTO dbo.Course (CourseID, Title, Credits, DepartmentID)
VALUES (2021, 'Composition', 3, 2);
INSERT INTO dbo.Course (CourseID, Title, Credits, DepartmentID)
VALUES (2042, 'Literature', 4, 2);
INSERT INTO dbo.Course (CourseID, Title, Credits, DepartmentID)
VALUES (4022, 'Microeconomics', 3, 4);
INSERT INTO dbo.Course (CourseID, Title, Credits, DepartmentID)
VALUES (4041, 'Macroeconomics', 3, 4);
INSERT INTO dbo.Course (CourseID, Title, Credits, DepartmentID)
VALUES (4061, 'Quantitative', 2, 4);
INSERT INTO dbo.Course (CourseID, Title, Credits, DepartmentID)
VALUES (3141, 'Trigonometry', 4, 7);
GO
-- 将数据插到 OnlineCourse 表中。
INSERT INTO dbo.OnlineCourse (CourseID, URL)
VALUES (2030, 'http://www.fineartschool.net/Poetry');
INSERT INTO dbo.OnlineCourse (CourseID, URL)
VALUES (2021, 'http://www.fineartschool.net/Composition');
INSERT INTO dbo.OnlineCourse (CourseID, URL)
VALUES (4041, 'http://www.fineartschool.net/Macroeconomics');
INSERT INTO dbo.OnlineCourse (CourseID, URL)
VALUES (3141, 'http://www.fineartschool.net/Trigonometry');
-- 将数据插到 OnsiteCourse 表中。
INSERT INTO dbo.OnsiteCourse (CourseID, Location, Days, [Time])
VALUES (1050, '123 Smith', 'MTWH', '11:30');
INSERT INTO dbo.OnsiteCourse (CourseID, Location, Days, [Time])
VALUES (1061, '234 Smith', 'TWHF', '13:15');
INSERT INTO dbo.OnsiteCourse (CourseID, Location, Days, [Time])
VALUES (1045, '121 Smith','MWHF', '15:30');
INSERT INTO dbo.OnsiteCourse (CourseID, Location, Days, [Time])
VALUES (4061, '22 Williams', 'TH', '11:15');
INSERT INTO dbo.OnsiteCourse (CourseID, Location, Days, [Time])
VALUES (2042, '225 Adams', 'MTWH', '11:00');
INSERT INTO dbo.OnsiteCourse (CourseID, Location, Days, [Time])
VALUES (4022, '23 Williams', 'MWF', '9:00');
-- 将数据插到 CourseInstructor 表中。
INSERT INTO dbo.CourseInstructor(CourseID, PersonID)
VALUES (1050, 1);
INSERT INTO dbo.CourseInstructor(CourseID, PersonID)
VALUES (1061, 31);
INSERT INTO dbo.CourseInstructor(CourseID, PersonID)
VALUES (1045, 5);
INSERT INTO dbo.CourseInstructor(CourseID, PersonID)
VALUES (2030, 4);
INSERT INTO dbo.CourseInstructor(CourseID, PersonID)
VALUES (2021, 27);
INSERT INTO dbo.CourseInstructor(CourseID, PersonID)
VALUES (2042, 25);
INSERT INTO dbo.CourseInstructor(CourseID, PersonID)
VALUES (4022, 18);
INSERT INTO dbo.CourseInstructor(CourseID, PersonID)
VALUES (4041, 32);
INSERT INTO dbo.CourseInstructor(CourseID, PersonID)
VALUES (4061, 34);
GO
-- 将数据插到 OfficeAssignment 表中。
INSERT INTO dbo.OfficeAssignment(InstructorID, Location)
VALUES (1, '17 Smith');
INSERT INTO dbo.OfficeAssignment(InstructorID, Location)
VALUES (4, '29 Adams');
INSERT INTO dbo.OfficeAssignment(InstructorID, Location)
VALUES (5, '37 Williams');
INSERT INTO dbo.OfficeAssignment(InstructorID, Location)
VALUES (18, '143 Smith');
INSERT INTO dbo.OfficeAssignment(InstructorID, Location)
VALUES (25, '57 Adams');
INSERT INTO dbo.OfficeAssignment(InstructorID, Location)
VALUES (27, '271 Williams');
INSERT INTO dbo.OfficeAssignment(InstructorID, Location)
VALUES (31, '131 Smith');
INSERT INTO dbo.OfficeAssignment(InstructorID, Location)
VALUES (32, '203 Williams');
INSERT INTO dbo.OfficeAssignment(InstructorID, Location)
VALUES (34, '213 Smith');
-- 将数据插到 StudentGrade 表中。
INSERT INTO dbo.StudentGrade (CourseID, StudentID, Grade)
VALUES (2021, 2, 4);
INSERT INTO dbo.StudentGrade (CourseID, StudentID, Grade)
VALUES (2030, 2, 3.5);
INSERT INTO dbo.StudentGrade (CourseID, StudentID, Grade)
VALUES (2021, 3, 3);
INSERT INTO dbo.StudentGrade (CourseID, StudentID, Grade)
VALUES (2030, 3, 4);
INSERT INTO dbo.StudentGrade (CourseID, StudentID, Grade)
VALUES (2021, 6, 2.5);
INSERT INTO dbo.StudentGrade (CourseID, StudentID, Grade)
VALUES (2042, 6, 3.5);
INSERT INTO dbo.StudentGrade (CourseID, StudentID, Grade)
VALUES (2021, 7, 3.5);
INSERT INTO dbo.StudentGrade (CourseID, StudentID, Grade)
VALUES (2042, 7, 4);
INSERT INTO dbo.StudentGrade (CourseID, StudentID, Grade)
VALUES (2021, 8, 3);
INSERT INTO dbo.StudentGrade (CourseID, StudentID, Grade)
VALUES (2042, 8, 3);
INSERT INTO dbo.StudentGrade (CourseID, StudentID, Grade)
VALUES (4041, 9, 3.5);
INSERT INTO dbo.StudentGrade (CourseID, StudentID, Grade)
VALUES (4041, 10, null);
INSERT INTO dbo.StudentGrade (CourseID, StudentID, Grade)
VALUES (4041, 11, 2.5);
INSERT INTO dbo.StudentGrade (CourseID, StudentID, Grade)
VALUES (4041, 12, null);
INSERT INTO dbo.StudentGrade (CourseID, StudentID, Grade)
VALUES (4061, 12, null);
INSERT INTO dbo.StudentGrade (CourseID, StudentID, Grade)
VALUES (4022, 14, 3);
INSERT INTO dbo.StudentGrade (CourseID, StudentID, Grade)
VALUES (4022, 13, 4);
INSERT INTO dbo.StudentGrade (CourseID, StudentID, Grade)
VALUES (4061, 13, 4);
INSERT INTO dbo.StudentGrade (CourseID, StudentID, Grade)
VALUES (4041, 14, 3);
INSERT INTO dbo.StudentGrade (CourseID, StudentID, Grade)
VALUES (4022, 15, 2.5);
INSERT INTO dbo.StudentGrade (CourseID, StudentID, Grade)
VALUES (4022, 16, 2);
INSERT INTO dbo.StudentGrade (CourseID, StudentID, Grade)
VALUES (4022, 17, null);
INSERT INTO dbo.StudentGrade (CourseID, StudentID, Grade)
VALUES (4022, 19, 3.5);
INSERT INTO dbo.StudentGrade (CourseID, StudentID, Grade)
VALUES (4061, 20, 4);
INSERT INTO dbo.StudentGrade (CourseID, StudentID, Grade)
VALUES (4061, 21, 2);
INSERT INTO dbo.StudentGrade (CourseID, StudentID, Grade)
VALUES (4022, 22, 3);
INSERT INTO dbo.StudentGrade (CourseID, StudentID, Grade)
VALUES (4041, 22, 3.5);
INSERT INTO dbo.StudentGrade (CourseID, StudentID, Grade)
VALUES (4061, 22, 2.5);
INSERT INTO dbo.StudentGrade (CourseID, StudentID, Grade)
VALUES (4022, 23, 3);
INSERT INTO dbo.StudentGrade (CourseID, StudentID, Grade)
VALUES (1045, 23, 1.5);
INSERT INTO dbo.StudentGrade (CourseID, StudentID, Grade)
VALUES (1061, 24, 4);
INSERT INTO dbo.StudentGrade (CourseID, StudentID, Grade)
VALUES (1061, 25, 3);
INSERT INTO dbo.StudentGrade (CourseID, StudentID, Grade)
VALUES (1050, 26, 3.5);
INSERT INTO dbo.StudentGrade (CourseID, StudentID, Grade)
VALUES (1061, 26, 3);
INSERT INTO dbo.StudentGrade (CourseID, StudentID, Grade)
VALUES (1061, 27, 3);
INSERT INTO dbo.StudentGrade (CourseID, StudentID, Grade)
VALUES (1045, 28, 2.5);
INSERT INTO dbo.StudentGrade (CourseID, StudentID, Grade)
VALUES (1050, 28, 3.5);
INSERT INTO dbo.StudentGrade (CourseID, StudentID, Grade)
VALUES (1061, 29, 4);
INSERT INTO dbo.StudentGrade (CourseID, StudentID, Grade)
VALUES (1050, 30, 3.5);
INSERT INTO dbo.StudentGrade (CourseID, StudentID, Grade)
VALUES (1061, 30, 4);
GO



参照 https://msdn.microsoft.com/zh-cn/data/jj614587


  实体框架词汇表 

  

术语

定义

Code First

使用代码创建实体框架模型。模型可以面向任何现有数据库或新数据库。

上下文

表示与数据库会话的类,用于查询和保存数据。上下文派生自 DbContext ObjectContext 类。

约定 (Code First)

实体框架用来根据类推断模型形状的规则。

Database First

使用 EF 设计器创建面向现有数据库的实体框架模型。

预先加载

一种加载相关数据的模式,在这种模式下,对一种实体的查询会在查询过程中也加载相关实体。

EF 设计器

Visual Studio 中的可视化设计器,可用来使用方框和线创建实体框架模型。

Entity

表示客户、产品和订单等应用程序数据的类或对象。

实体数据模型

描述实体以及实体间关系的模型。

显式加载

一种加载相关数据的模式,在此模式下,将通过调用 API 来调用相关对象。

Fluent API

可用于配置 Code First 模型的 API

外键关联

实体间的一种关联,其中,表示外键的属性包括在依赖实体的类中(即,Product 包含一个 CategoryId 属性)。

识别关系

一种关系,其中主体实体的主键是依赖实体的主键的一部分。在这种关系中,没有主体实体,依赖实体就不能存在。

独立关联

实体间的一种关联,其中,依赖实体的类中没有表示外键的属性(即,Product 类包含与 Category 的关系,但没有 CategoryId 属性)。实体框架将使用独立对象来跟踪这种关系。

延迟加载

一种加载相关数据的模式,在此模式下,访问导航属性时将自动加载相关对象。

Model First

使用 EF 设计器创建实体框架模型,随后使用此模型来创建新数据库。

导航属性

引用其他实体的实体属性(即,Product 包含 Category 导航属性,而 Category 包含 Products 导航属性)。

关系逆反

关系的相对一端,例如,product.Category category.Product

自跟踪实体

从代码生成模板生成的实体,这种实体有助于 N 层开发。

每个具体类型一张表 (TPC)

一种映射继承的方法,其中,层次结构中的每个非抽象类型都映射到数据库中单独的表。

每个层析结构一个表 (TPH)

一种映射继承的方法,其中,层次结构中的所有类型都映射到数据库中的同一个表。鉴别器列用于标识每行所关联的类型。

每个类型一张表 (TPT)

一种映射继承的方法,其中,层次结构中所有类型的公共属性都映射到数据库中的同一个表,但每个类型的唯一属性都映射到单独的表。

类型发现

对应该是实体框架模型的一部分的类型进行标识的过程。

© 著作权归作者所有

月影南溪

月影南溪

粉丝 11
博文 21
码字总数 50075
作品 0
河西
程序员
私信 提问
加载中

评论(0)

有时在面试时,我都替候选人着急——候选人完全可以在面试前准备

我上周和本周面了一些Java高级开发方面的候选人,不能说不好,但根据他们的工作经历和项目经验,完全应该发挥得更好。比如一些只要是做过项目一定会用到的技术,他们普遍都没回答好,而且很多...

osc_zfz30hgc
2018/01/25
4
0
Mac上搭建Hadoop环境(3) — Hive下载及安装

文章目录 前言 主要步骤 安装mysql 配置hive元数据库 Hive安装 设置环境变量 设置配置文件 准备mysql-connector-java 初始化元数据 启动metastore 测试 前言 之前已经完成了hadoop集群的安装...

osc_uv42f7cs
2019/03/24
11
0
Java Web项目开发从0开始的要点!

前言 本文章详细的列出了开发一个传统JavaWeb项目需要注意的要点,从环境准备开始到三层架构搭建,需要注意的地方全部罗列出来。 第一部分:环境准备 1. Maven命令创建web骨架 2. 注意在IDE...

Mr_zebra
2018/11/27
6
0
更新简历后,来找我的公司都是外包?什么情况!

  你是否有过这么一段经历,一直做着OA,CRM管理系统等传统项目,简历技能开头第一行,基本都是“Java基础扎实”,然后下面接着就是熟悉XXX。然后不断列名词,举例一下:   Java基础扎实...

java进阶架构师
01/13
0
0
解析ArcGis拓扑——检查的流程,以面重叠检查为例

最简单的面重叠错误检查是使用“地理处理”——“面相交”进行检查,其结果是重叠部分提取而成的新面要素类。本例不讲述此种方法。 step1 准备待拓扑检查数据 名词: 数据库 DataBase→顾名思...

osc_xngmlta7
2019/01/10
4
0

没有更多内容

加载失败,请刷新页面

加载更多

一言难尽,Jpa这个功能差点让我丢了工作

故事背景 前阵子,有位朋友在微信上问我数据被删了能不能恢复,我问了下原因,居然是因为一个配置项惹的祸。 故事细节 在 Spring Boot 中使用 jpa 来操作数据库,jpa 就不做详细的介绍了,相...

osc_axe50nd6
30分钟前
12
0
Link Cut Tree

//知识点 : LCT /*By:Luckyblock*/#include <cstdio>#include <ctype.h>#include <algorithm>#define ls (t[x].son[0])#define rs (t[x].son[1])const int kMaxn = 1e5 + 10;//===......

osc_q5urtsdm
31分钟前
25
0
【问题】Could not locate PropertySource and the fail fast property is set, failing

这是我遇到的问题 Could not locate PropertySource and the fail fast property is set, failing springcloud的其他服务读取不了配置中心得配置文件出错,原因是配置中心的一个配置文件有s...

osc_z9jr2tjo
32分钟前
14
0
Angular SPA基于Ocelot API网关与IdentityServer4的身份认证与授权(四)

在上一讲中,我们已经完成了一个完整的案例,在这个案例中,我们可以通过Angular单页面应用(SPA)进行登录,然后通过后端的Ocelot API网关整合IdentityServer4完成身份认证。在本讲中,我们...

osc_doeya1ck
33分钟前
16
0
[推荐]大量 Blazor 学习资源(一)

前言 / Introduction Blazor 是什么? Blazor 允许您使用 C# 而不是 JavaScript 构建交互式 Web UI。 Blazor 应用由使用 C#、HTML 和 CSS 实现的可重用 Web UI 组件组成。客户端和服务器代码...

osc_3r4js8qy
34分钟前
21
0

没有更多内容

加载失败,请刷新页面

加载更多

返回顶部
顶部