SQL query to LinqToSql - sql

Question

I have this SQL query that I want to translate into Linq-to-SQL:
Now here's the beginning of the Linq-to-SQL code but I'm stuck on how to group fields and get SUM :
private void GetDatas()
{
DateTime d = DateTime.Now;
using (DataClasses1DataContext dc = new DataClasses1DataContext())
{
var query = from ent in dc.STK_ABC_ENT
join det in dc.STK_ABC_DET on ent.ENT_ID equals det.ENT_ID
join art in dc.FICHES_ARTICLES on ent.ART_CODE equals art.ART_CODE
where !ent.ENT_NUM_PAL.Contains("FDR_")
&& ent.ENT_OUTDATE == null
&& ent.ENT_PICKING == null
&& ent.ENT_DATE_ENT != d
// How to group here ?
// How to get SUM ??
}
}

Answer 1

You can use group x by ColumnName into z to group a column.
When you want to group multiple columns you can use group x by new { x.Column1, x.Column2 } into z.
When you want to group multiple columns in multiple tables you can use group new { x, y } by new { x.Column, y.Column } into z.
With Sum, just call it in select with lamda expression.
Example:
var query = from ent in dc.STK_ABC_ENT
join det in dc.STK_ABC_DET on ent.ENT_ID equals det.ENT_ID
join art in dc.FICHES_ARTICLES on ent.ART_CODE equals art.ART_CODE
where !ent.ENT_NUM_PAL.Contains("FDR_") && ent.ENT_OUTDATE == null
&& ent.ENT_PICKING == null && ent.ENT_DATE_ENT != d
group new { art, ent } by new {
art.ART_CODE,
...,
ent.ENT_DATE_ENT,
...
} into grouped
select new {
ArtCode = grouped.Key.ART_CODE,
SumPdsNet = grouped.Sum(x => x.DET_PNET),
...
}
I hope it can work for you.