如何在LinQ中转换此咨询

Question

我正在尝试在此查询中进行转换

from lckr in BD.Inventory_Lockers join emp in BD.Employees on lckr.EmployeeID equals emp.EmployeeID 
join jti in BD.JobTitles on emp.JobTitleID equals jti.JobTitleID 
join dpt in BD.JobTitles on jti.DepartmentID equals dpt.DepartmentID  
select new { DepartmentN =  dpt.Department.DepartmentName, asignationDate= lckr.asignation_date, lockers = lckr.LockersID.Count() } 
.ToList())

Answer 1

我了解您想转换为T-SQL，如下所示

SELECT 
     dpt.DepartmentName AS DepartmentN
    ,lckr.asignation_date AS asignationDate
    ,COUNT(lckr.LockersID) AS lockers
FROM Inventory_Lockers lckr
JOIN Employees emp ON emp.EmployeeID = lckr.EmployeeID
JOIN JobTitles jti ON jti.JobTitleID = emp.JobTitleID
JOIN Department dpt ON jti.DepartmentID = dpt.DepartmentID 
GROUP BY 
     dpt.DepartmentName
    ,lckr.asignation_date