[英]How to write a “Not In” SQL query in LINQ?
如何將以下SQL查詢轉換為可比較的LINQ查詢?
select * from Dept
where Id not in (
Select Id
from Employee
where Salary > 100);
嘗試這樣的事情:
var result = from d in Dept
let expensiveEmployeeIds = (from e in Employee.Employees
where e.Salary > 100
select e.Id)
where !expensiveEmployeeIds.Contains(d.Id)
select d;
這個怎么樣?
var lowPaidEmps = from d in db.Dept
join e in db.Employees on d.Id equals e.Id
where e.Salary <= 100
select d;
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