我必须从三个表中选择值。第一个表是sale_project_detail，第二个表是design_project_detail，第三个表是design_designer。
sale_project_detail 架构：
Id int,
Name nvarchar(50),
ShortDescription nvarchar(max)
design_project_assignment 架构：
Id int,
DId int (It is foreign key of design_designer table),
SPId int (It is foreign key of sale_project_detail table),
AssignDateTime datetime,
DueDate date,
Status varchar(10)
design_designer 架构：
Id int,
Name nvarchar(15)
现在，我必须从中选择完整的细节 sale_project_detail
where assign_project_detail.SPId <> sale_project_detail.Id,
和
Select design_designer(Name)
from design_designer
where design_designer.Id = assign_project_detail.DId
我正在尝试下面的代码，但是返回错误的结果。
我的代码：
SELECT
sale_project_detail.*,
design_project_assignment.*,
design_designer.Name
FROM
sale_project_detail,
design_project_assignment,
design_designer
WHERE
NOT EXISTS(SELECT NULL
FROM design_project_assignment
LEFT JOIN design_designer ON design_designer.Id = design_project_assignment.DId
WHERE sale_project_detail.Id = design_project_assignment.SPId)
提前致谢。
试试这个
SELECT
*
FROM
sale_project_detail as spd
inner join design_project_assignment dpa on dpa.spid <> spd.id
inner join design_designer dd on dd.id = dpa.did;
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我来说两句