如何在LINQ c中编写此查询＃

Question

$sql = "SELECT * FROM installment WHERE SellorderID = ("; 
$sql .= "SELECT ID FROM sellorder WHERE ShopID = ("; 
$sql .= "SELECT ID FROM shop WHERE Number = $shopno)) AND Received = 0"; 

$shopno是函数的参数。

Answer 1

这是一个开放式问题。
您的目标解决方案是想要使用LinqToSql，实体框架，本地数据源还是......？

我建议你看看这个指南，以更多地了解C＃中的LinqToSql。

Simple LINQ to SQL in C#

希望它能帮助。

Answer 2

试试这个：

from i in Installment 
join so in SellOrder 
    on i.SellOrderId equals so.ID 
join sh in Shop 
    on so.ShopId equals sh.Id 
where sh.Number == $shopno && i.Received == 0 
select i