Lambda expression in C# using Entity Framework with multiple left outer joins with in line additional filter

Question

We are using Entity Framework in my project. In one of the requirement I need to query data from multiple tables using left outer joins along with conditions. Here is the SQL script. Can someone provide the lambda expression for this?

SELECT  
    e.EmployeeId, e.EmployeeFirstName, e.EmployeeLastName,
    s.SkillId, s.SkillName,
    c.CertificateId, c.CertificateName, c.ExpiryDate
FROM    
    [dbo].[Employee] AS e
LEFT OUTER JOIN 
    [dbo].[EmployeeSkill] AS s ON e.EmployeeId = s.EmployeeId 
                               AND s.IsActiveSkill = 1
LEFT OUTER JOIN 
    [dbo].[EmployeeCertification] AS c ON e.EmployeeId = c.EmployeeId  
                                       AND c.IsActiveCertification = 1  
                                       AND c.ExpiryDate < GETUTCDATE() + 30
WHERE   
    e.DepartmentId = 1
    AND e.IsActiveEmployee = 1

Answer 1

You can use GroupJoin. It has same functionality as left outer join in SQL.