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You can have a look at these tools to convert SQl to LINQ: 
 
LINQPAD - <a href="https://www.linqpad.net/" rel="ugc">https://www.linqpad.net/</a>&nbsp; (Free) 
 
or Linqer <a href="http://www.sqltolinq.com/" rel="ugc">http://www.sqltolinq.com/</a>&nbsp;(paid)
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I tried LINQPAD, it runs my query, but I don't see how to get the conversion to LINQ
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Theres an example here 
 
 
<a href="https://sampathloku.blogspot.com/2012/08/how-to-convert-linq-entity-query-into-t.html" rel="ugc">https://sampathloku.blogspot.com/2012/08/how-to-convert-linq-entity-query-into-t.html</a> 
 
It does linq to sql, just check the other options to convert it backwords
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Hi Jess31; 
 
See if this give you what you are looking for.
<pre><code class="code-10 nolinks" id="code-20-41801948-1">'' Change all Field(0f Integer) to the correct DataType
Dim results = (From r In dt.AsEnumerable()
 Group r By Key = r.Field(Of Integer)(&quot;Dep&quot;) Into depGroup = Group
 Order By Key
 Select New With {
 .Dep = Key,
 .Cnt = depGroup.Count(),
 .Qty = depGroup.Sum(Function(q) q.Field(Of Integer)(&quot;Qty&quot;)),
 .Cost = depGroup.Sum(Function(c) c.Field(Of Integer)(&quot;Qty&quot;) * c.Field(Of Integer)(&quot;Cost&quot;)),
 .Sales = depGroup.Sum(Function(c) c.Field(Of Integer)(&quot;Qty&quot;) * c.Field(Of Integer)(&quot;Sales&quot;))
 }).ToList()
 
</code></pre>
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yes, I see his seems to return the SQL for the LINQ but for me it doesn't return the LINQ from the SQL 
 
<a href="https://filedb.experts-exchange.com/incoming/2016/09_w38/1117093/linq1.png" target="_blank" title="linq1.png (22 KB)"><img alt="linq1.png" class="file-block lazyload" style="max-width: 800px;" data-src="https://filedb.experts-exchange.com/incoming/2016/09_w38/800_1117093/linq1.png" /></a>
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linq1.png

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To your statement, &quot;yes, I see his seems to return the SQL for the LINQ but for me it doesn't return the LINQ from the SQL&quot;. Are you querying the SQL database or the DataTable object in code?
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SQL Database. The Datatable is created in code, I don't know if I am able to query against it in this tool
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Are you using the SQL database to get the information you posted in the question or have you crated a DataTable object and filled it in some other means and wish to query that DataTable?
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I am using a table on SQL DB that is similar to the DataTable against which I want to run LINQ
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Jess, My mistake, 
 
 
Linqpad doesn't convert SQL to LINQ, only the other way (LINQ to SQL) &nbsp;It relies on the .Net Linq-to-Sql library or Entity framework for the translation.
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So if you are wanting to query the DataTable object that is in local memory then try my last post that has the Linq query. Also in that query you will need to change, dt in dt.AsEnumerable(), to your actual instance name for the DataTable object.
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*NO POINTS* 
 
Proof of concept:
<pre><code class="code-10 nolinks" id="code-20-41802171-1">Imports System.Data.SqlClient

Module Module1
	Sub Main()
		Dim adapter As SqlDataAdapter = Nothing
		Dim table As DataTable = Nothing
		Dim [list] As List(Of Department)
		Try
			Connection.Open()
			If Connection.State.Equals(ConnectionState.Open) Then
				table = New DataTable()
				[list] = New List(Of Department)()
				adapter = New SqlDataAdapter(&quot;SELECT * FROM SALESTABLE&quot;, Connection)
				adapter.Fill(table)
				For Each row As DataRow In table.Rows
					[list].Add(New Department() With {.Department = row(&quot;DEPT&quot;), .Quantity = row(&quot;QTY&quot;), .Cost = row(&quot;COST&quot;), .Sales = row(&quot;SALES&quot;)})
				Next
			End If
		Finally
			If adapter IsNot Nothing Then adapter.Dispose()
		End Try
		Dim a1 = (From row In table
				Order By row(&quot;DEPT&quot;)
				Group row By DEPT = row(&quot;DEPT&quot;) Into g = Group
				Select New With
					 {
						Key DEPT,
						 .CNT = g.Count(),
						 .QTY = g.Sum(Function(x) x(&quot;QTY&quot;)),
						 .COST = g.Sum(Function(x) x(&quot;COST&quot;) * x(&quot;QTY&quot;)),
						 .SALES = g.Sum(Function(x) x(&quot;SALES&quot;) * x(&quot;QTY&quot;))
						 })
		Dim a2 = (From item In [list]
			Order By item.Department
			Group item By DEPT = item.Department Into g = Group
			Select New With
			{
				Key DEPT,
				 .CNT = g.Count(),
				 .QTY = g.Sum(Function(x) x.Quantity),
				 .COST = g.Sum(Function(x) x.Cost * x.Quantity),
				 .SALES = g.Sum(Function(x) x.Sales * x.Quantity)
				})

		Console.WriteLine(&quot;From a datatable&quot;)
		For Each group In a1
			Console.WriteLine(group)
		Next

		Console.WriteLine()
		Console.WriteLine(&quot;From a list&quot;)
		For Each group In a2
			Console.WriteLine(group)
		Next
		Console.ReadLine()
	End Sub
End Module

Module Globals
	Public Property Connection() As SqlConnection = New SqlConnection(&quot;Data Source=.;Initial Catalog=EE_Q28970321;Integrated Security=True&quot;)
End Module

Class Department
	Public Property Department() As Integer
	Public Property Quantity() As Integer
	Public Property Cost() As Decimal
	Public Property Sales() As Decimal
End Class
</code></pre>
From a set of data in the database -<a href="https://filedb.experts-exchange.com/incoming/2016/09_w38/1117105/Capture.JPG" target="_blank" title="Capture.JPG (41 KB)"><img alt="Capture.JPG" class="file-block lazyload" style="max-width: 556px;" data-src="https://filedb.experts-exchange.com/incoming/2016/09_w38/1117105/Capture.JPG" /></a>Produces the following output from SQL -<a href="https://filedb.experts-exchange.com/incoming/2016/09_w38/1117106/Capture.JPG" target="_blank" title="Capture.JPG (38 KB)"><img alt="Capture.JPG" class="file-block lazyload" style="max-width: 331px;" data-src="https://filedb.experts-exchange.com/incoming/2016/09_w38/1117106/Capture.JPG" /></a>And the following output from the application using LINQ -<a href="https://filedb.experts-exchange.com/incoming/2016/09_w38/1117107/Capture.JPG" target="_blank" title="Capture.JPG (62 KB)"><img alt="Capture.JPG" class="file-block lazyload" style="max-width: 746px;" data-src="https://filedb.experts-exchange.com/incoming/2016/09_w38/1117107/Capture.JPG" /></a>-saige-
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Capture.JPG

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Fernando Soto 
I got the code to do the Group Totals, etc. 
If I just wanted total aggregation with not groups what change do I need to make ?
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Please post the query you are working with. When you say, &quot;If I just wanted total aggregation with not groups&quot;, does that mean you do not want any Grouping?
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Right not grouping. 
dt = 
Name 
Salary 
Benefits 
 
And I want grand total of Salary and Benefits (name is ignored)
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<div>
Hi Jess31; 
 
Something like this should work.
<pre><code class="code-1 nolinks" id="code-20-41807743-1">Dim results = (From r In dt.AsEnumerable()
 Group By Key = &quot;OneGroup&quot; Into justOneGroup = Group
 Select New With {
 .Salary = justOneGroup.Sum(Function(s) s.Field(Of Integer)(&quot;Salary&quot;)),
 .Benefits = justOneGroup.Sum(Function(c) c.Field(Of Integer)(&quot;Benefits&quot;)
 }).ToList()
</code></pre>
But the fields are not the same, is this a different question?
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But I am asking specifically w/o Grouping, just grand totals
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<div class="content wysiwyg-content">
I am using vb.net. I have a data table with these columns: 
Dep 
Qty 
Cost 
Sales 
 
In SQL I would do: 
Select 
Max(Dep) dep, 
count(*) cnt, 
Sum(qty) qty, 
Sum(Cost*qty) Cost 
Sum(sales*qty) Sales 
From tbl 
Group By dep 
Order By dep 
 
How can I do this in LINQ?
</div>
</div>

I am using vb.net. I have a data table with these columns:
Dep
Qty
Cost
Sales

In SQL I would do: 
Select 
Max(Dep) dep, 
count(*) cnt,
Sum(qty) qty, 
Sum(Cost*qty) Cost
Sum(sales*qty) Sales
From tbl
Group By dep
Order By dep

How can I do this in LINQ?

How to do in LINQ??

Visual Basic .NET (VB.NET) is an object-oriented programming language implemented on the .NET framework, but also supported on other platforms such as Mono and Silverlight. Microsoft launched VB.NET as the successor to the Visual Basic language. Though it is similar in syntax to  Visual Basic pre-2002, it is not the same technology,

Visual Basic.NET

The .NET Framework is not specific to any one programming language; rather, it includes a library of functions that allows developers to rapidly build applications. Several supported languages include C#, VB.NET, C++ or ASP.NET.