在SQL中创建非重复视图

Question

我有两张桌子

1. 开发

   • Developer_Id
   • 姓名
   • 手机号码
   • 电子邮件地址
   • 队
   • 角色
   • 已分配给

2. 作业表

   • JOB_ID
   • 作业名称
   • 作业说明
   • 创建者
   • 创建日期
   • 截止日期
   • 状态

我想查看JobList表，但它应该包括：

• Developers.Full Name
• Developers.Team
• Developers.Role
• Developers.Assigned To

我创建了一个视图，但它返回了重复的值，如下所示：



有什么办法可以在一行中查看JobList表，但是包含了Developers表中的多个行，就像这样



这是我使用的代码

创建表格：

CREATE TABLE [dbo].[Developers] (
[Developer_Id]     INT          NOT NULL,
[Full Name]        VARCHAR (50) NULL,
[Cellphone number] VARCHAR (50) NULL,
[Email address]    VARCHAR (50) NULL,
[Team]             VARCHAR (50) NULL,
[Role]             VARCHAR (50) NULL, 
[Assigned To] INT NULL, 
CONSTRAINT [PK_Developers] PRIMARY KEY ([Developer_Id])
);

CREATE TABLE [dbo].[JobList] (
[Job_Id]                 INT           NOT NULL,
[Assignment Name]        VARCHAR (50)  NULL,
[Assignment Description] VARCHAR (MAX) NULL,
[Created By]             VARCHAR (50)  NULL,
[Date Created]           DATE          NULL,
[Due Date]               DATE          NULL, 
[Status] VARCHAR(50) NULL, 
CONSTRAINT [PK_JobList] PRIMARY KEY ([Job_Id])
);

创建视图

CREATE VIEW [dbo].AssignedJobs
AS SELECT JobList.[Assignment Name], JobList.[Assignment Description], JobList.[Due Date], JobList.[Status],Developers.[Full Name], Developers.[Role]
from JobList
inner join Developers
on JobList.Job_Id = Developers.[Assigned To]

Answer 1

CREATE VIEW [dbo].AssignedJobs
AS SELECT JobList.[Assignment Name], JobList.[Assignment Description], 
JobList.[Due Date], JobList.[Status],Developers.[Full Name], Developers.[Role]
from JobList
inner join Developers
on JobList.Job_Id = Developers.[Assigned To]
group by JobList.[Assigment Name], JobList.[Assignment Description], JobList.[Due Date], JobList[Status], string_agg(Developers.[Full Name], ' ') as [Full Name], string_agg (Developers.Role, ' ') as Role

如果您不在SQL Server 2017 / Azure上，请使用以下内容：Agg with Stuff and XML FOR PATH