如何将一个表中的主键(代理)添加到另一个表的外键中
本文关键字:添加 代理 另一个 一个 | 更新日期: 2023-09-27 18:20:01
我正试图将我的客户表中的CustId(主键)添加到客户地址表中的客户ID(外键)中。但是我无法自动添加外键。我该怎么办。下面是我的架构(我从SQL Server实例中复制了它)
CREATE TABLE [dbo].[Customers]
(
[CustId] INT IDENTITY (1, 1) NOT NULL,
[FirstName] NVARCHAR (50) NOT NULL,
[MiddleName] NVARCHAR (50) NULL,
[LastName] NVARCHAR (50) NOT NULL,
[Salutation] NVARCHAR (10) NULL,
[Position] NVARCHAR (50) NULL,
[OrganizationType] NVARCHAR (50) NULL,
[PhoneNumber] NVARCHAR (50) NOT NULL,
[Ext] NCHAR (10) NULL,
[FaxNumber] NVARCHAR (50) NULL,
[CellNumber] NVARCHAR (50) NULL,
[EmailAddress] NVARCHAR (50) NOT NULL,
[EmailPermission] NCHAR (10) NOT NULL,
[Password] NVARCHAR (50) NOT NULL,
PRIMARY KEY CLUSTERED ([CustId] ASC)
);
CREATE TABLE [dbo].[CustomerAddress]
(
[AddressID] INT NOT NULL IDENTITY (1, 1),
[CustID] INT,
[OrganizationName] NVARCHAR (50) NOT NULL,
[Division] NVARCHAR (50) NULL,
[Department] NVARCHAR (50) NOT NULL,
[BuildingRoom] NVARCHAR (50) NULL,
[Street] NVARCHAR (50) NULL,
[City] NVARCHAR (50) NULL,
[POBox] NVARCHAR (50) NULL,
[Province] NVARCHAR (50) NULL,
[PostalCode] NCHAR (10) NOT NULL,
[Country] NVARCHAR (30) NOT NULL,
[AddressType] CHAR (10) NOT NULL,
PRIMARY KEY CLUSTERED ([AddressID]),
CONSTRAINT [FK_CustID] FOREIGN KEY ([CustID]) REFERENCES [dbo].[Customers] ([CustId])
);
插入数据的C#代码:
public int AddCustomerDeliveryAddress(CustomerAddressBLL NewCustomerDeliveryAddressBLL)
{
string sql = string.Format(@"Insert into CustomerAddress (OrganizationName,Division,Department,BuildingRoom,Street,City,POBox,Province,PostalCode,Country,AddressType)
Values(@OrganizationName,@Division,@Department,@BuildingRoom,@Street,@City,@POBox,@Province,@PostalCode,@Country,@AddressType)");
db.AddParameter("@OrganizationName", NewCustomerDeliveryAddressBLL.Organization);
db.AddParameter("@Division", NewCustomerDeliveryAddressBLL.Division);
db.AddParameter("@Department", NewCustomerDeliveryAddressBLL.Department);
db.AddParameter("@BuildingRoom", NewCustomerDeliveryAddressBLL.BuildingRoom);
db.AddParameter("@Street", NewCustomerDeliveryAddressBLL.Street);
db.AddParameter("@City", NewCustomerDeliveryAddressBLL.City);
db.AddParameter("@POBox", NewCustomerDeliveryAddressBLL.PoBox);
db.AddParameter("@Province", NewCustomerDeliveryAddressBLL.Province);
db.AddParameter("@PostalCode", NewCustomerDeliveryAddressBLL.PostalCode);
db.AddParameter("@Country", NewCustomerDeliveryAddressBLL.Country);
db.AddParameter("@AddressType", NewCustomerDeliveryAddressBLL.AddressType);
return db.ExecuteNonQuery(sql);
}
如果您在"纯"T-SQL中执行此操作,则需要使用以下代码:
-- declare variable for your identity
DECLARE @NewCustId INT;
-- insert into your Customers table
INSERT INTO dbo.Customers([FirstName], [MiddleName], [LastName], ......)
VALUES ('John', 'Robert', 'Doe', ........);
-- get the newly inserted Identity value
SET @NewCustId = SCOPE_IDENTITY();
-- insert into CustomerAddress table
INSERT INTO dbo.CustomerAddress ([CustID], [OrganizationName], [Division], ......)
VALUES(@NewCustId, 'Orgname', 'Division', .....)
更新:好的,这是C#代码-您需要将其更改为在末尾包含SELECT SCOPE_IDENTITY()
:
string sql = string.Format(@"INSERT INTO dbo.CustomerAddress (OrganizationName, Division, Department, BuildingRoom, Street, City, POBox, Province, PostalCode, Country, AddressType)
VALUES (@OrganizationName, @Division, @Department, @BuildingRoom, @Street, @City, @POBox, @Province, @PostalCode, @Country, @AddressType);
SELECT SCOPE_IDENTITY();");
并使用此调用:
int newCustId = (int)db.ExecuteScalar(sql);
所以您现在可以从INSERT
调用中返回NewCustID
-现在在第二次插入中使用该值您需要将数据插入CustomerAddress