如何解决有人可以帮我将SQL查询转换为LINQ表达式吗?
| 有人可以帮我将以下SQL查询转换为LINQ表达式吗?select student.StudentID,student.FirstName + \' \' + student.MiddleInitial + \' \' + student.LastName,student.OpenDate,acct.Balance
from Student student
inner join
(Select StudentID,Sum(Amount) as Balance
from Account
Group by StudentID) as acct on student.StudentID = acct.StudentID
以下LINQ表达式有效!非常感谢Phil!
var results = (from s in Students
join a in Accounts on s.StudentID equals a.StudentID
group a by new
{s.StudentID,s.FirstName,s.MiddleInitial,s.LastName,s.OpenDate}
into z
select new
{ StudentID = z.Key.StudentID,FirstName = z.Key.FirstName,MiddleInitial = z.Key.MiddleInitial,LastName = z.Key.LastName,OpenDate = z.Key.OpenDate,Balance = z.Sum(a=> a.Amount)
}
);
谢谢!
解决方法
试试看吗?
var stu =
from s in db.Students
join a in db.Account on s.StudentID equals a.StudentID
group a by new
{s.StudentID,s.FirstName,s.MiddleInitial,s.LastName,s.OpenDate}
into z
select new
{ StudentID = z.Key.StudentID,FullName = string.Format(\"{0} {1} {2}\",z.Key.FirstName,z.Key.MiddleInitial,z.Key.LastName),OpenDate = z.Key.OpenDate,Balance = z.Sum(a=>a.Amount)
};
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