Sql 以类父子树格式编写查询

我正在从事一个MVC项目，我的SQL查询有些复杂。我有三张桌子

顾客

水平仪

LevelDetails

两个表都有关系

级别映射到级别详细信息，级别详细信息映射到客户和级别

我想以树格式显示数据，例如：

父项：客户名称CustomerId客户类型

     Test          T1          TestCustomer

子Levelid Leveldesc城市状态

      L1       L1desc     C1    S1

      L2       L2desc     C2    S2

逻辑是当我单击父级时，它会显示子级

我试着回答这个问题

select LD.Level_Rid, LD.Customer_Rid, LD.Level_Detail_Rid, L.Level_Id, L.Level_Description, L.Country, L.State, L.City, L.Area, CU.Customer_Name, CU.Customer_Type
FROM [dbo].[Level] L
INNER JOIN [dbo].[Level_Detail] LD ON R.Level_Rid = RD.Level_Rid 
INNER JOIN [dbo].[Customer] CU ON LD.Customer_Rid = CU.Customer_Rid

可以使用SQL查询吗

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我用cte编写了这个查询：

WITH cte_cu as 
 ( select Customer_Rid from  [dbo].[Customer] as cU )
--select * from  cte_cu where CustomerRid = CustomerRid
select Customer_Rid, 1 orderKeeper,Customer_Name as CustomerName ,[State] as [State],City,Customer_id from  [dbo].[Customer]  where Customer_Rid = Customer_Rid
union
select Customer_Rid,2,'LevelId' as Customer_Name ,'LevelDescription' ,'','' from  [dbo].[Customer]
union
select Customer_Rid,3,Level_Id as Customer_Name ,Level_Description,'','' 
FROM [dbo].[Level_Detail] LD 
inner join dbo.[Level] as L on LD.Level_Rid = L.Level_Rid 
where LD.Customer_Rid = Customer_Rid

结果:

我在git hub上上传了创建表和插入模拟数据：

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我使用的是Sqlserver。我需要sql查询中的父子树格式您可能需要递归CTE。@Dotnet我添加了一个答案，但我认为最好的办法是用代码隐藏处理此类事务。@Dotnet如果我有错误，请告诉我，我可以改进或更改我的答案Thankyou@Ghanat。