Question

Hi guys I have this SQL query (MSSQL), I’m doing a query where the result of joins are giving me the “top” row of newest row by date without having duplicates of results, you can find here information of what I’m doing http://goo.gl/Uv0FR The thing is this, I accomplished already the SQL query, Is Working as I’m expecting, I’m getting 1 row for each IDKEY uses in the clause “where pi.PlazaIe in (”,”) without duplication

Select * from PlazaI pi
join (
    Select * from PlazaE pe where 
    NOT EXISTS(SELECT 1 FROM PlazaE pe1 
    WHERE pe.Id_plaza = pe1.Id_plaza AND pe1.Fecha > pe.Fecha AND pe1.Fecha < GETDATE() and pe1.Id_Emp != 0) 
) pe on pe.Id_plaza = pieepo.Id_plaza
join Emp e on pe.Id_Emp = e.Id_Emp
join View ct on ct.Id_Nodo = pe.id_nodo
where pi.PlazaIe in ('value1','value2')

The PROBLEM is when I’m trying to convert from SQL to LINQ is just can’t make to happened. (I’m new in this world of Linq)

the following is my linq query.

var q1 = (from pe in db.PlazaEmpleados 
               where !db.PlazaEmpleados.Any
                                    (
                                     pe1 => (pe1.Id_plaza.Equals(pe.Id_plaza) && pe1.Fecha > pe.Fecha && pe1.Id_Emp != 0 && pe1.Fecha > DateTime.Now)
                                    ) select pe);

    var q2 = (from pi in db.Context
              join pe in (q1) on pi.Id_plaza equals pe.Id_plaza
                select new EmpVO
                  {
                    Id_Nodo = pe.id_nodo,
                    Id_plaza = pi.PlazaSome,
                    Num_Plaza = pi.Id_plaza,
                  }); 

When I run this linq2sql query I’m getting duplicate results instead of just 1 for each value. So the thing is, I would like to know if someone can convert in a good way the SQL query to LINQ Query or point me where is the error.

thanks in advance.

Answer 1

I didn’t find answer which resolve my problem, so what I finally did is to use the

db.ExecuteQuery<ObjectVO>(sqlQuery);

I know this is not the best practice and also don’t resolve the question why my sql query and my linq query don’t get the same result set, but non of the previous answer did.

The other thing is my query grown in complexity (new business logic requirement) have to join 7 table and search for Max dates and movement is some of them, so now is more complicated to transform the query to a linq to sql.

Thanks for the support.