Complex subquery in Entity Framework 6 - entity-framework

Question

I have an entity called Insurance like this:
public class Insurance : BaseEntity, IExpirationDocument
{
[DatabaseGenerated(DatabaseGeneratedOption.Identity)]
public override int Id { get; set; }
[Column(TypeName = "NVARCHAR")]
[StringLength(256)]
public string PathToCertificate { get; set; }
[Column(TypeName = "NVARCHAR")]
[StringLength(50)]
public string Filename { get; set; }
public int Value { get; set; }
public string Name => InsuranceType.Name;
public DateTime ExpiryDate { get; set; }
public DateTime IssueDate { get; set; }
public bool Active { get; set; }
public int InsuranceTypeId { get; set; }
public virtual InsuranceType InsuranceType { get; set; }
public int InsurerId { get; set; }
public virtual Insurer Insurer { get; set; }
public int ApplicantId { get; set; }
public virtual Applicant Applicant { get; set; }
public int? DocumentEmailHistoryId { get; set; }
public virtual DocumentEmailHistory DocumentEmailHistory { get; set; }
public Insurance()
{
Active = true;
}
}
Would it be possible to do this type of query with Entity Framework:
SELECT *
FROM Insurances i1
INNER JOIN
(SELECT
insuranceTypeId, applicantid, MAX(IssueDate) as 'maxissuedate'
FROM
Insurances
GROUP BY
insuranceTypeId, applicantid) AS i2 ON i1.applicantid = i2.applicantid
AND i1.insuranceTypeId = i2.insuranceTypeId
WHERE
i1.issueDate = i2.maxissuedate

Answer 1

If you are trying to get latest issued Insurance according to InsuranceTypeId and ApplicantId you can group data according to needed properties, order by IssueDate descendingly and take only one Insurance info. Of course it will not give you the same query but it will give you the same result:
var result = context.Insurances
.GroupBy(m => new { m.InsuranceTypeId , m.ApplicantId })
.Select( g => new
{
MaxInsurance = g.OrderByDescending(m => m.IssueDate)
.Take(1)
})
.SelectMany(m => m.MaxInsurance);