C# MVC如何使用Linq ASP.NET MVC连接两个表或模型？

我正在使用asp.NET MVC。我正试图找到员工的工资等级[正如我们在使用scott模式的oracle 12c中所发现的那样]。我已经创建了4个模型EMP、DEPT、Bonus和SalGrade（与oracle 12c中的scott模式相同）。在Oracle-12c中查找成绩的查询如下

SELECT s.grade, count(*), max(sal)
 FROM EMP e, SalGrade s
   WHERE e.sal BETWEEN s.LoSal AND s.HiSal
     GROUP BY s.grade;

我只需要将上述给定查询转换为ASP.NET MVC LINQ查询。

我创建的模型如下

部门型号：

public class Department{
[Key]
public int Deptno { get; set; }
public string Dname { get; set; }
public string  Loc { get; set; }}

 public class Employee
{
    [Key]
    public int Empno { get; set; }
    public string  Ename { get; set; }
    public string Job { get; set; }
    public int Mgr { get; set; }
    public DateTime Hiredate { get; set; }
    public int Sal { get; set; }
    public int Comm { get; set; }
    public int Deptno { get; set; }
    public Department Department { get; set; }

}

EMP型号：

public class Department{
[Key]
public int Deptno { get; set; }
public string Dname { get; set; }
public string  Loc { get; set; }}

 public class Employee
{
    [Key]
    public int Empno { get; set; }
    public string  Ename { get; set; }
    public string Job { get; set; }
    public int Mgr { get; set; }
    public DateTime Hiredate { get; set; }
    public int Sal { get; set; }
    public int Comm { get; set; }
    public int Deptno { get; set; }
    public Department Department { get; set; }

}

SalGrade型号

public class Salgrade
{
    [Key]
    public int Grade { get; set; }
    public int LoSal { get; set; }
    public int HiSal { get; set; }
}

---

在控制器类方法中，您可能有如下代码：

using(var db = new DepartmentEntities()){

    var query = from db.Employee, db.Salgrade
                where db.Employee.Sal between db.Salgrade.LoSal and db.Salgrade.HiSal
                group by db.Salgrade.Grade
                select new { db.Salgrade.Grade, count(*), max(db.Employee.Sal) };

    // Use query results in a foreach loop or whatever...
}