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步步為營 .NET三層架構解析 二、數據庫設計

系統 1941 0
要開發用戶管理系統,我們首先要了解需求,現在就舉一個簡單需求,用戶表,假設有兩種角色用一個字段departID來判斷,管理員和員工,
我們要先建一個用戶表custom和一個部門表department:
CREATE TABLE [dbo].[custom](
???? [id] [ int ] IDENTITY(1,1) NOT NULL,
???? [cname] [nvarchar](50) COLLATE Chinese_PRC_CI_AS NOT NULL,
???? [departID] [ int ] NOT NULL,
???? [age] [ int ] NOT NULL,
???? [ename] [nvarchar](50) COLLATE Chinese_PRC_CI_AS NOT NULL,
???? [password] [nvarchar](50) COLLATE Chinese_PRC_CI_AS NOT NULL,
? CONSTRAINT [PK_custom] PRIMARY KEY CLUSTERED?
(
???? [id] ASC
)WITH (PAD_INDEX? = OFF, STATISTICS_NORECOMPUTE? = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS? = ON, ALLOW_PAGE_LOCKS? = ON) ON [PRIMARY]
) ON [PRIMARY];
? ?
CREATE TABLE [dbo].[department](
???? [id] [ int ] IDENTITY(1,1) NOT NULL,
???? [departname] [nvarchar](50) COLLATE Chinese_PRC_CI_AS NOT NULL,
???? [description] [nchar](10) COLLATE Chinese_PRC_CI_AS NOT NULL,
? CONSTRAINT [PK_department] PRIMARY KEY CLUSTERED?
(
???? [id] ASC
)WITH (PAD_INDEX? = OFF, STATISTICS_NORECOMPUTE? = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS? = ON, ALLOW_PAGE_LOCKS? = ON) ON [PRIMARY]
) ON [PRIMARY]
建完數據庫表后,開始寫存儲過程,插入一條數據:
CREATE PROCEDURE [dbo].[spInsertCustom]
@cname nvarchar(50),
@ename nvarchar(50),
@age int ,
@departID int ,
@password nvarchar(50)
AS
BEGIN
insert into custom(cname,departID,age,ename,password) values (@cname,@departID,@age,@ename,@password)
END
? ?
RETURN @@Identity
create PROCEDURE [dbo].[spInsertDepartment]
@departname nvarchar(50),
@description nvarchar(50)
AS
BEGIN
???? insert into department(departname,description)values(@departname,@description)
END
? ?
RETURN @@Identity

現建兩個更新一條數據的存儲過程:

CREATE PROCEDURE [dbo].[spupdatecustom]?
@id int ,
@cname nvarchar(50),
@departID int ,
@age int ,
@ename nvarchar(50),
@password nvarchar(50)
AS
BEGIN
???? update?
??????? custom?
???? set
???? cname = @cname,
???? departID = @departID,
???? age = @age,
???? ename = @ename,
???? password = @password
???? where id = @id
END
COMMIT TRAN
create procedure spupdatedepart
(
@departname nvarchar(50),
@description nchar(10),
@id int
)
as
UPDATE [dbo].[department]
??? SET [departname] = @departname
?????? ,[description] = @departname
? WHERE id=@id

再新建兩個取出所有用戶的存儲過程:

CREATE PROCEDURE [dbo].[spGetcustom]
????? ?
AS
BEGIN
???? select * from custom order by id desc
END
create PROCEDURE [dbo].[spGetAlldepartment]
? ?
AS
BEGIN
???? select * from department?
END

再新建一個根據ID取出一條數據的存儲過程:

CREATE PROCEDURE [dbo].[spGetcustomer]
@id int
AS
BEGIN
? select * from custom where id = @id
END

現建一個根據部門名取部門ID的存儲過程:

create PROCEDURE [dbo].[spGetdepartmenter]
@departname nvarchar(50)
AS
BEGIN
???? select * from department where departname = @departname
END

再建兩個根據ID刪除數據的存儲過程:

create PROCEDURE [dbo].[spDeletecustom]
@id int
AS
BEGIN
????? delete custom where id = @id
END
CREATE PROCEDURE spdeletedepart
@id int
AS
BEGIN
???? delete department where id = @id
END
GO

數據庫設計就建好了,這只是一個簡單的示例.歡迎拍磚.

下次講解SQLHelper的設計.

步步為營 .NET三層架構解析 二、數據庫設計


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