附註參考資料工具結構描述 (EDM 範例應用程式)
此應用程式中實作的實體會使用 實體資料模型 (EDM),並在概念結構定義語言 (CSDL) 中宣告及定義。有三個實體會用來容納 Web 參考、介紹人描述項和連絡人的相關資料。需要第四個實體來容納連接介紹人和連絡人的識別項組。如需實體和關聯的詳細資訊,請參閱 EDM 規格。
每一個連絡人都可以與許多介紹人產生關聯,而連絡人與介紹人之間的關聯必須實作為多對多的關聯。每一個介紹人描述項都只包含一個 Web 參考的資料,但是一個介紹人可以與許多介紹人描述項有關;介紹人與介紹人描述項之間的關聯會實作為多對一。
下列結構描述區段包含 Reference 實體的宣告。Key 屬性會指定為 ReferenceID 屬性。三個其他屬性如下:DocumentType、DocumentText 和 Locator。Locator 屬性包含用來尋找 Web 參考的 URL。雖然這個範例中的應用程式程式碼不會使用 DocumentType 和 DocumentText,但是會提供這兩者當做使用 SQL Server 之全文檢索搜尋功能的其他實作。如需結構描述的詳細資訊,請參閱結構描述 (EDM)。
名為 RefDescriptors 的導覽屬性在應用程式程式碼中提供了 ReferenceDescriptor 實體執行個體的捷徑,該實體與 Reference 型別的執行個體有關。如需導覽屬性的詳細資訊,請參閱導覽屬性 (EDM)。
<EntityType Name="Reference">
<Key>
<PropertyRef Name="ReferenceID" />
</Key>
<Property Name="ReferenceID" Type="Guid" Nullable="false" />
<Property Name="DocumentType" Type="String" MaxLength="8" />
<Property Name="DocumentText" Type="String" MaxLength="4000" />
<Property Name="Locator" Type="String" Nullable="false"
MaxLength="500" />
<NavigationProperty Name="RefDescriptors"
Relationship="Self.ReferenceDescriptor_Reference"
FromRole="Reference" ToRole="ReferenceDescriptor" />
</EntityType>
ReferenceDescriptor 實體會在下列結構描述區段中宣告及定義:
<EntityType Name="ReferenceDescriptor">
<Key>
<PropertyRef Name="DescriptorID" />
</Key>
<Property Name="DescriptorID" Type="Guid" Nullable="false" />
<Property Name="Annotation" Type="String" MaxLength="2000" />
<Property Name="Keyword" Type="String" MaxLength="50" />
<NavigationProperty Name="Reference"
Relationship="Self.ReferenceDescriptor_Reference"
FromRole="ReferenceDescriptor" ToRole="Reference" />
</EntityType>
此實體包含 Annotation 屬性和 Keyword 屬性。可使用一個或兩個屬性來分類及描述網頁 Reference。兩個屬性中的任一個可以為 Null,但是應該指派其中一個。應用程式中的使用者介面可驗證它是否必要。
Reference 實體上的導覽屬性會使用下列結構描述區段中所定義的 Association:
<Association Name="ReferenceDescriptor_Reference">
<End Role="Reference" Type="ResearchCollaborationDataModel.Reference" Multiplicity="1" />
<End Role="ReferenceDescriptor"
Type="ResearchCollaborationDataModel.ReferenceDescriptor"
Multiplicity="*" />
</Association>
此關聯中使用的 <End> 標記指示一對多關聯性中的 Reference 和 ReferenceDescriptor 實體。每一個 Reference 都可由任何數目的描述項來描述。當已經建置物件模型時,導覽屬性的功能就像是 RefDescriptor 執行個體的集合。導覽屬性會建置為可程式化資料模型中的 ObjectQuery。
此關聯中的 End 和 Role 定義是同義的。
實作多對多關聯
因為任意數目的 References 都可以與任意數目的 Contacts 產生關聯,所以這些實體之間的關聯必須實作為多對多關聯。多對多關聯需要儲存區實作中的連結資料表,以及概念結構描述和儲存中繼資料中的實體宣告來代表此連結資料表。然後會宣告連結實體與 Contact 實體和 Reference 實體之間的關聯。
下列 CSDL 中的實體宣告會使用資料庫中的連結資料表。存放結構定義語言 (SSDL) 中的類似宣告會提供此連結資料表的相關中繼資料。
<EntityType Name="ContactPersonReference">
<Key>
<PropertyRef Name="ContactPersonRefID" />
</Key>
<Property Name="ContactPersonRefID" Type="Guid" Nullable="false" />
<NavigationProperty Name="RelatedReference"
Relationship="Self.LinkTable_Reference"
FromRole="ContactPersonReference" ToRole="Reference" />
<NavigationProperty Name="RelatedContact"
Relationship="Self.LinkTable_ContactPerson"
FromRole="ContactPersonReference" ToRole="ContactPerson" />
</EntityType>
Key 識別是此結構描述中唯一宣告的屬性。導覽屬性代表相關 Reference 執行個體與相關 ContactPerson 執行個體的集合。在資料表中,有一些資料行包含 ReferenceID 和 ContactPersonID GUID 的配對。
有兩個關聯支援多對多關聯性:LinkTable_Reference 和 LinkTable_ContactPerson。這些關聯定義在下列語法中:
<AssociationSet Name="LinkTable_Reference"
Association="ResearchCollaborationDataModel.LinkTable_Reference">
<End Role="Reference" EntitySet="Reference" />
<End Role="ContactPersonReference"
EntitySet="ContactPersonReference" />
</AssociationSet>
<Association Name="LinkTable_ContactPerson">
<End Role="ContactPerson" Type="ResearchCollaborationDataModel.ContactPerson" Multiplicity="1" />
<End Role="ContactPersonReference"
Type="ResearchCollaborationDataModel.ContactPersonReference"
Multiplicity="*" />
</Association>
每一個關聯都定義為一對多,但是連結實體上的導覽屬性會連接 Reference/ContactPerson 配對的集合。
完整結構描述和對應規格
下列章節包含這個範例使用的結構描述和對應規格。
概念結構描述 (CSDL)
此應用程式使用的實體和關聯會定義在 CSDL 中。此物件模型是從這個設計結構描述建置而來。
<?xml version="1.0" encoding="utf-8"?>
<Schema Namespace="ResearchCollaborationDataModel" Alias="Self"
xmlns="https://schemas.microsoft.com/ado/2006/04/edm">
<EntityType Name="Reference">
<Key>
<PropertyRef Name="ReferenceID" />
</Key>
<Property Name="ReferenceID" Type="Guid" Nullable="false" />
<Property Name="DocumentType" Type="String" />
<Property Name="DocumentText" Type="String" />
<Property Name="Locator" Type="String" Nullable="false" />
<NavigationProperty Name="RefDescriptors"
Relationship="Self.ReferenceDescriptor_Reference" FromRole="Reference"
ToRole="ReferenceDescriptor" />
</EntityType>
<EntityType Name="ReferenceDescriptor">
<Key>
<PropertyRef Name="DescriptorID" />
</Key>
<Property Name="DescriptorID" Type="Guid" Nullable="false" />
<Property Name="Annotation" Type="String" />
<Property Name="Keyword" Type="String" />
<NavigationProperty Name="Reference"
Relationship="Self.ReferenceDescriptor_Reference"
FromRole="ReferenceDescriptor" ToRole="Reference" />
</EntityType>
<EntityType Name="ContactPerson">
<Key>
<PropertyRef Name="ContactPersonID" />
</Key>
<Property Name="ContactPersonID" Type="Guid" Nullable="false" />
<Property Name="LastName" Type="String" Nullable="false" />
<Property Name="FirstName" Type="String" Nullable="false" />
<Property Name="Title" Type="String" />
<Property Name="Email" Type="String" Nullable="false" />
</EntityType>
<EntityType Name="ContactPersonReference">
<Key>
<PropertyRef Name="ContactPersonRefID" />
</Key>
<Property Name="ContactPersonRefID" Type="Guid" Nullable="false" />
<NavigationProperty Name="RelatedReference" Relationship="Self.LinkTable_Reference"
FromRole="ContactPersonReference" ToRole="Reference" />
<NavigationProperty Name="RelatedContact" Relationship="Self.LinkTable_ContactPerson"
FromRole="ContactPersonReference" ToRole="ContactPerson" />
</EntityType>
<Association Name="ReferenceDescriptor_Reference">
<End Role="Reference" Type="ResearchCollaborationDataModel.Reference" Multiplicity="1" />
<End Role="ReferenceDescriptor" Type="ResearchCollaborationDataModel.ReferenceDescriptor" Multiplicity="*" />
</Association>
<Association Name="LinkTable_ContactPerson">
<End Role="ContactPerson" Type="ResearchCollaborationDataModel.ContactPerson" Multiplicity="1" />
<End Role="ContactPersonReference" Type="ResearchCollaborationDataModel.ContactPersonReference" Multiplicity="*" />
</Association>
<Association Name="LinkTable_Reference">
<End Role="Reference" Type="ResearchCollaborationDataModel.Reference" Multiplicity="1" />
<End Role="ContactPersonReference"
Type="ResearchCollaborationDataModel.ContactPersonReference"
Multiplicity="*" />
</Association>
<EntityContainer Name="ResearchCollaborationData">
<EntitySet Name="ContactPerson"
EntityType="ResearchCollaborationDataModel.ContactPerson" />
<EntitySet Name="ContactPersonReference"
EntityType="ResearchCollaborationDataModel.ContactPersonReference" />
<EntitySet Name="Reference" EntityType="ResearchCollaborationDataModel.Reference" />
<EntitySet Name="ReferenceDescriptor"
EntityType="ResearchCollaborationDataModel.ReferenceDescriptor" />
<AssociationSet Name="LinkTable_ContactPerson"
Association="ResearchCollaborationDataModel.LinkTable_ContactPerson">
<End Role="ContactPerson" EntitySet="ContactPerson" />
<End Role="ContactPersonReference"
EntitySet="ContactPersonReference" />
</AssociationSet>
<AssociationSet Name="LinkTable_Reference"
Association="ResearchCollaborationDataModel.LinkTable_Reference">
<End Role="Reference" EntitySet="Reference" />
<End Role="ContactPersonReference"
EntitySet="ContactPersonReference" />
</AssociationSet>
<AssociationSet Name="ReferenceDescriptor_Reference"
Association="ResearchCollaborationDataModel.ReferenceDescriptor_Reference">
<End Role="Reference" EntitySet="Reference" />
<End Role="ReferenceDescriptor" EntitySet="ReferenceDescriptor" />
</AssociationSet>
</EntityContainer>
</Schema>
儲存中繼資料結構描述 (SSDL)
EDM 應用程式使用之儲存結構的中繼資料是使用 SSDL 所定義。
<?xml version="1.0" encoding="utf-8"?>
<Schema Namespace="ResearchCollaborationDataTarget" Alias="Self"
Provider="System.Data.SqlClient"
ProviderManifestToken="2005"
xmlns="https://schemas.microsoft.com/ado/2006/04/edm/ssdl">
<EntityType Name="ContactPerson">
<Key>
<PropertyRef Name="ContactPersonID" />
</Key>
<Property Name="ContactPersonID" Type="uniqueidentifier"
Nullable="false" />
<Property Name="LastName" Type="nvarchar" Nullable="false"
MaxLength="50" />
<Property Name="FirstName" Type="nvarchar" Nullable="false"
MaxLength="50" />
<Property Name="Title" Type="nvarchar" MaxLength="50" />
<Property Name="Email" Type="nvarchar" Nullable="false"
MaxLength="50" />
</EntityType>
<EntityType Name="ContactPersonReference">
<Key>
<PropertyRef Name="ContactPersonRefID" />
</Key>
<Property Name="ContactPersonID" Type="uniqueidentifier"
Nullable="false" />
<Property Name="ReferenceID" Type="uniqueidentifier"
Nullable="false" />
<Property Name="ContactPersonRefID" Type="uniqueidentifier"
Nullable="false" />
</EntityType>
<EntityType Name="Reference">
<Key>
<PropertyRef Name="ReferenceID" />
</Key>
<Property Name="ReferenceID" Type="uniqueidentifier"
Nullable="false" />
<Property Name="DocumentType" Type="nvarchar" MaxLength="8" />
<Property Name="DocumentText" Type="nvarchar" MaxLength="4000" />
<Property Name="Locator" Type="nvarchar" Nullable="false"
MaxLength="500" />
</EntityType>
<EntityType Name="ReferenceDescriptor">
<Key>
<PropertyRef Name="DescriptorID" />
</Key>
<Property Name="DescriptorID" Type="uniqueidentifier"
Nullable="false" />
<Property Name="ReferenceID" Type="uniqueidentifier"
Nullable="false" />
<Property Name="Annotation" Type="nvarchar" MaxLength="2000" />
<Property Name="Keyword" Type="nvarchar" MaxLength="50" />
</EntityType>
<Association Name="LinkTable_ContactPerson">
<End Role="ContactPerson"
Type="ResearchCollaborationDataTarget.ContactPerson" Multiplicity="1"/>
<End Role="ContactPersonReference"
Type="ResearchCollaborationDataTarget.ContactPersonReference"
Multiplicity="*" />
<ReferentialConstraint>
<Principal Role="ContactPerson">
<PropertyRef Name="ContactPersonID" />
</Principal>
<Dependent Role="ContactPersonReference">
<PropertyRef Name="ContactPersonID" />
</Dependent>
</ReferentialConstraint>
</Association>
<Association Name="LinkTable_Reference">
<End Role="Reference"
Type="ResearchCollaborationDataTarget.Reference"
Multiplicity="1" />
<End Role="ContactPersonReference"
Type="ResearchCollaborationDataTarget.ContactPersonReference"
Multiplicity="*" />
<ReferentialConstraint>
<Principal Role="Reference">
<PropertyRef Name="ReferenceID" />
</Principal>
<Dependent Role="ContactPersonReference">
<PropertyRef Name="ReferenceID" />
</Dependent>
</ReferentialConstraint>
</Association>
<Association Name="ReferenceDescriptor_Reference">
<End Role="Reference"
Type="ResearchCollaborationDataTarget.Reference" Multiplicity="1" />
<End Role="ReferenceDescriptor"
Type="ResearchCollaborationDataTarget.ReferenceDescriptor"
Multiplicity="*" />
<ReferentialConstraint>
<Principal Role="Reference">
<PropertyRef Name="ReferenceID" />
</Principal>
<Dependent Role="ReferenceDescriptor">
<PropertyRef Name="ReferenceID" />
</Dependent>
</ReferentialConstraint>
</Association>
<EntityContainer Name="dbo">
<EntitySet Name="ContactPerson"
EntityType="ResearchCollaborationDataTarget.ContactPerson" />
<EntitySet Name="ContactPersonReference"
EntityType="ResearchCollaborationDataTarget.ContactPersonReference"/>
<EntitySet Name="Reference"
EntityType="ResearchCollaborationDataTarget.Reference" />
<EntitySet Name="ReferenceDescriptor"
EntityType="ResearchCollaborationDataTarget.ReferenceDescriptor"/>
<AssociationSet Name="LinkTable_ContactPerson"
Association="ResearchCollaborationDataTarget.LinkTable_ContactPerson">
<End Role="ContactPerson" EntitySet="ContactPerson" />
<End Role="ContactPersonReference"
EntitySet="ContactPersonReference" />
</AssociationSet>
<AssociationSet Name="LinkTable_Reference"
Association="ResearchCollaborationDataTarget.LinkTable_Reference">
<End Role="Reference" EntitySet="Reference" />
<End Role="ContactPersonReference"
EntitySet="ContactPersonReference" />
</AssociationSet>
<AssociationSet Name="ReferenceDescriptor_Reference"
Association="ResearchCollaborationDataTarget.ReferenceDescriptor_Reference">
<End Role="Reference" EntitySet="Reference" />
<End Role="ReferenceDescriptor" EntitySet="ReferenceDescriptor" />
</AssociationSet>
</EntityContainer>
</Schema>
對應規格 (MSL)
CSDL 中定義的實體和關聯會使用對應規格語言 (MSL) 對應到 SSDL 中的儲存中繼資料。
<?xml version="1.0" encoding="utf-8"?>
<Mapping Space="C-S"
xmlns:edm="urn:schemas-microsoft-com:windows:storage:mapping:CS"
xmlns="urn:schemas-microsoft-com:windows:storage:mapping:CS">
<edm:EntityContainerMapping
CdmEntityContainer="ResearchCollaborationData"
StorageEntityContainer="dbo">
<edm:EntitySetMapping Name="ContactPerson">
<edm:EntityTypeMapping
TypeName="ResearchCollaborationDataModel.ContactPerson">
<edm:MappingFragment StoreEntitySet="ContactPerson">
<edm:ScalarProperty Name="ContactPersonID"
ColumnName="ContactPersonID" />
<edm:ScalarProperty Name="LastName" ColumnName="LastName"/>
<edm:ScalarProperty Name="FirstName"
ColumnName="FirstName" />
<edm:ScalarProperty Name="Title" ColumnName="Title" />
<edm:ScalarProperty Name="Email" ColumnName="Email" />
</edm:MappingFragment>
</edm:EntityTypeMapping>
</edm:EntitySetMapping>
<edm:EntitySetMapping Name="ContactPersonReference">
<edm:EntityTypeMapping
TypeName="ResearchCollaborationDataModel.ContactPersonReference">
<edm:MappingFragment StoreEntitySet="ContactPersonReference">
<edm:ScalarProperty Name="ContactPersonRefID"
ColumnName="ContactPersonRefID" />
</edm:MappingFragment>
</edm:EntityTypeMapping>
</edm:EntitySetMapping>
<edm:EntitySetMapping Name="Reference">
<edm:EntityTypeMapping
TypeName="ResearchCollaborationDataModel.Reference">
<edm:MappingFragment StoreEntitySet="Reference">
<edm:ScalarProperty Name="ReferenceID"
ColumnName="ReferenceID" />
<edm:ScalarProperty Name="DocumentType"
ColumnName="DocumentType" />
<edm:ScalarProperty Name="DocumentText"
ColumnName="DocumentText" />
<edm:ScalarProperty Name="Locator"
ColumnName="Locator" />
</edm:MappingFragment>
</edm:EntityTypeMapping>
</edm:EntitySetMapping>
<edm:EntitySetMapping Name="ReferenceDescriptor">
<edm:EntityTypeMapping
TypeName="ResearchCollaborationDataModel.ReferenceDescriptor">
<edm:MappingFragment StoreEntitySet="ReferenceDescriptor">
<edm:ScalarProperty Name="DescriptorID"
ColumnName="DescriptorID" />
<edm:ScalarProperty Name="Annotation"
ColumnName="Annotation" />
<edm:ScalarProperty Name="Keyword" ColumnName="Keyword" />
</edm:MappingFragment>
</edm:EntityTypeMapping>
</edm:EntitySetMapping>
<edm:AssociationSetMapping Name="LinkTable_ContactPerson"
TypeName="ResearchCollaborationDataModel.LinkTable_ContactPerson"
StoreEntitySet="ContactPersonReference">
<edm:EndProperty Name="ContactPerson">
<edm:ScalarProperty Name="ContactPersonID"
ColumnName="ContactPersonID" />
</edm:EndProperty>
<edm:EndProperty Name="ContactPersonReference">
<edm:ScalarProperty Name="ContactPersonRefID"
ColumnName="ContactPersonRefID" />
</edm:EndProperty>
<edm:Condition ColumnName="ContactPersonID" IsNull="false" />
</edm:AssociationSetMapping>
<edm:AssociationSetMapping Name="LinkTable_Reference"
TypeName="ResearchCollaborationDataModel.LinkTable_Reference"
StoreEntitySet="ContactPersonReference">
<edm:EndProperty Name="Reference">
<edm:ScalarProperty Name="ReferenceID"
ColumnName="ReferenceID" />
</edm:EndProperty>
<edm:EndProperty Name="ContactPersonReference">
<edm:ScalarProperty Name="ContactPersonRefID"
ColumnName="ContactPersonRefID" />
</edm:EndProperty>
<edm:Condition ColumnName="ReferenceID" IsNull="false" />
</edm:AssociationSetMapping>
<edm:AssociationSetMapping Name="ReferenceDescriptor_Reference"
TypeName="ResearchCollaborationDataModel.ReferenceDescriptor_Reference"
StoreEntitySet="ReferenceDescriptor">
<edm:EndProperty Name="Reference">
<edm:ScalarProperty Name="ReferenceID"
ColumnName="ReferenceID" />
</edm:EndProperty>
<edm:EndProperty Name="ReferenceDescriptor">
<edm:ScalarProperty Name="DescriptorID"
ColumnName="DescriptorID" />
</edm:EndProperty>
<edm:Condition ColumnName="ReferenceID" IsNull="false" />
</edm:AssociationSetMapping>
</edm:EntityContainerMapping>
</Mapping>
下列指令碼可用來建立此範例中使用的資料庫。若要使用 SQL Server Management Studio 建立 ResearchCollaborationData 資料庫和結構描述:
在 [檔案] 功能表上,指向 [新增],然後按一下 [Database Engine 查詢]。
在 [連接到 Database Engine] 對話方塊中,輸入 localhost 或 SQL Server 執行個體的名稱,然後按一下 [連接]。
將下列 Transact-SQL 指令碼貼入查詢視窗中,然後按一下 [執行]。
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
USE [master];
GO
IF EXISTS (SELECT * FROM sys.databases
WHERE name = 'ResearchCollaborationData')
DROP DATABASE ResearchCollaborationData;
GO
-- Create the database.
CREATE DATABASE ResearchCollaborationData;
GO
USE ResearchCollaborationData;
GO
IF NOT EXISTS (SELECT * FROM sys.objects
WHERE object_id = OBJECT_ID(N'[dbo].[ContactPerson]')
AND type in (N'U'))
BEGIN
CREATE TABLE [dbo].[ContactPerson](
[ContactPersonID] [uniqueidentifier] NOT NULL,
[LastName] [nvarchar](50) NOT NULL,
[FirstName] [nvarchar](50) NOT NULL,
[Title] [nvarchar](50) NULL,
[Email] [nvarchar](50) NOT NULL,
CONSTRAINT [PK_ContactPerson] PRIMARY KEY CLUSTERED
(
[ContactPersonID] ASC
)WITH (PAD_INDEX = OFF, 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].[Reference]')
AND type in (N'U'))
BEGIN
CREATE TABLE [dbo].[Reference](
[ReferenceID] [uniqueidentifier] NOT NULL,
[DocumentType] [nvarchar](8) NULL,
[DocumentText] [nvarchar](max) NULL,
[Locator] [nvarchar](500) NOT NULL,
CONSTRAINT [PK_Reference] PRIMARY KEY CLUSTERED
(
[ReferenceID] ASC
)WITH (PAD_INDEX = OFF, 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].[ContactPersonReference]')
AND type in (N'U'))
BEGIN
CREATE TABLE [dbo].[ContactPersonReference](
[ContactPersonID] [uniqueidentifier] NOT NULL,
[ReferenceID] [uniqueidentifier] NOT NULL,
[ContactPersonRefID] [uniqueidentifier] NOT NULL,
CONSTRAINT [PK_ContactPersonReference] PRIMARY KEY CLUSTERED
(
[ContactPersonRefID] ASC
)WITH (PAD_INDEX = OFF, 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].[ReferenceDescriptor]')
AND type in (N'U'))
BEGIN
CREATE TABLE [dbo].[ReferenceDescriptor](
[DescriptorID] [uniqueidentifier] NOT NULL,
[ReferenceID] [uniqueidentifier] NOT NULL,
[Annotation] [nvarchar](2000) NULL,
[Keyword] [nvarchar](50) NULL,
CONSTRAINT [PK_ReferenceDescriptor] PRIMARY KEY CLUSTERED
(
[DescriptorID] ASC
)WITH (PAD_INDEX = OFF, 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].[LinkTable_ContactPerson]') AND parent_object_id =
OBJECT_ID(N'[dbo].[ContactPersonReference]'))
ALTER TABLE [dbo].[ContactPersonReference]
WITH CHECK ADD CONSTRAINT [LinkTable_ContactPerson] FOREIGN KEY([ContactPersonID])
REFERENCES [dbo].[ContactPerson] ([ContactPersonID])
GO
ALTER TABLE [dbo].[ContactPersonReference] CHECK CONSTRAINT [LinkTable_ContactPerson]
GO
IF NOT EXISTS (SELECT * FROM sys.foreign_keys
WHERE object_id = OBJECT_ID(N'[dbo].[LinkTable_Reference]') AND parent_object_id =
OBJECT_ID(N'[dbo].[ContactPersonReference]'))
ALTER TABLE [dbo].[ContactPersonReference]
WITH CHECK ADD CONSTRAINT [LinkTable_Reference] FOREIGN KEY([ReferenceID])
REFERENCES [dbo].[Reference] ([ReferenceID])
GO
ALTER TABLE [dbo].[ContactPersonReference] CHECK CONSTRAINT [LinkTable_Reference]
GO
IF NOT EXISTS (SELECT * FROM sys.foreign_keys
WHERE object_id = OBJECT_ID(N'[dbo].[ReferenceDescriptor_Reference]')
AND parent_object_id = OBJECT_ID(N'[dbo].[ReferenceDescriptor]'))
ALTER TABLE [dbo].[ReferenceDescriptor]
WITH CHECK ADD CONSTRAINT [ReferenceDescriptor_Reference] FOREIGN KEY([ReferenceID])
REFERENCES [dbo].[Reference] ([ReferenceID])
GO
ALTER TABLE [dbo].[ReferenceDescriptor] CHECK CONSTRAINT [ReferenceDescriptor_Reference]
GO
USE ResearchCollaborationData
GO
INSERT INTO dbo.Reference(ReferenceId, DocumentType, DocumentText, Locator)
VALUES ('12b18fe1-be82-486c-b248-00183aad2c88', '', '', 'https://msdn2.microsoft.com/en-us/data/aa937722.aspx')
INSERT INTO dbo.Reference(ReferenceId, DocumentType, DocumentText, Locator)
VALUES ('34bf3c5f-202a-45fe-af42-0a1d9bf489e2', '', '', 'https://msdn2.microsoft.com/en-us/library/190bkk9s.aspx')
INSERT INTO dbo.Reference(ReferenceId, DocumentType, DocumentText, Locator)
VALUES ('cfc4a592-296d-4b6f-b8fe-0e7a42b4a29a', '', '', 'https://blogs.msdn.com/adonet/archive/2007/01/30/entity-data-model-part-1.aspx')
INSERT INTO dbo.Reference(ReferenceId, DocumentType, DocumentText, Locator)
VALUES ('aad24f4c-c461-4d62-8723-6b52574311d1', '', '', 'https://www.microsoft.com/windows/directx/productinfo/overview/default.mspx')
INSERT INTO dbo.Reference(ReferenceId, DocumentType, DocumentText, Locator)
VALUES ('7d4a1c27-3046-4866-974f-81b1e4642719', '', '', 'https://msdn2.microsoft.com/en-us/library/ms269115.aspx')
INSERT INTO dbo.Reference(ReferenceId, DocumentType, DocumentText, Locator)
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ADO.NET
The designer in this CTP is an early prototype and only supports designing the “Conceptual” layer. The designer can also generate an Entity Data Model with 1:1 mappings from an existing database that you can use right away in your application while also graphically visualizing the “Conceptual” layer. Please take a look at the walkthroughs in the Overview document included with the Entity Data Model Designer prototype for more details.
https://blogs.msdn.com/adonet/archive/2006/09/27/ADONET_vNext_EDM_Designer.aspx
ADO.NET 2.0
https://msdn2.microsoft.com/en-us/data/aa937722.aspx
EDM
Generate an Entity Data Model with 1:1 mappings from an existing database that you can use right away in your application while also graphically visualizing the “Conceptual” layer. To aid brainstorming and to better understand typical developer scenarios, the ADO.NET team created an internal prototype of a designer to let developers model the ADO.NET vNext “Conceptual” layer.
https://blogs.msdn.com/adonet/archive/2006/09/27/ADONET_vNext_EDM_Designer.aspx
Entity Data Model 101
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https://blogs.msdn.com/adonet/archive/2007/01/30/entity-data-model-part-1.aspx
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另請參閱
概念
附註和研究共同作業工具 (EDM 範例應用程式)
附註參考資料工具應用程式程式碼 (EDM 範例應用程式)
關聯 (EDM)
實體類型 (EDM)