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POMVC: Best way to create Dynamic Group By
 

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  1. POMVC: Best way to create Dynamic Group By
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    <p>I got a list of items which can be checked and passed each time differently. The items selected will be moved into a string list containing those checked items.</p> <p>I want to learn a way which will help me create the query required to group by those columns choosen, for example, If i check "OperatorTypeName" and "CompanyName" Ill receive relative query:</p> <pre><code>SELECT OperatorTypeName AS Group1, Company.CompanyName AS Group2, SUM(Adv.Price) AS SumPrice FROM Adv (nolock) INNER JOIN Program (nolock) ON Adv.ProgramID = Program.ProgramID INNER JOIN Operator (nolock) ON Program.OperatorID = Operator.OperatorID INNER JOIN OperatorType (nolock) ON Operator.OperatorTypeID = OperatorType.OperatorTypeID INNER JOIN CampaignVersion (nolock) ON Adv.CampaignVersionID = CampaignVersion.CampaignVersionID INNER JOIN Campaign ON CampaignVersion.CampaignID = Campaign.CampaignID INNER JOIN Campaign2Product (nolock) ON Campaign.CampaignID = Campaign2Product.CampaignID INNER JOIN Product2Company (nolock) ON Product2Company.ProductID = Campaign2Product.ProductID INNER JOIN Product2SubBranch (nolock) ON Product2SubBranch.ProductID = Campaign2Product.ProductID INNER JOIN SubBranch (nolock) ON SubBranch.SubBranchID = Product2SubBranch.SubBranchID INNER JOIN Branch (nolock) ON SubBranch.BranchID = Branch.BranchID INNER JOIN Company (nolock) ON Product2Company.CompanyID = Company.CompanyID INNER JOIN Company Manager (nolock) on Campaign.Manager =Manager.CompanyID WHERE (Adv.TransmitDate &gt;= getdate()-7) GROUP BY OperatorTypeName , Company.CompanyName </code></pre> <p>While if only "OperatorTypeName" will be checked , ill receive the appropriate query for this condition:</p> <pre><code>SELECT OperatorTypeName AS Group1, SUM(Adv.Price) AS SumPrice FROM Adv (nolock) INNER JOIN Program (nolock) ON Adv.ProgramID = Program.ProgramID INNER JOIN Operator (nolock) ON Program.OperatorID = Operator.OperatorID INNER JOIN OperatorType (nolock) ON Operator.OperatorTypeID = OperatorType.OperatorTypeID INNER JOIN CampaignVersion (nolock) ON Adv.CampaignVersionID = CampaignVersion.CampaignVersionID INNER JOIN Campaign ON CampaignVersion.CampaignID = Campaign.CampaignID INNER JOIN Campaign2Product (nolock) ON Campaign.CampaignID = Campaign2Product.CampaignID INNER JOIN Product2Company (nolock) ON Product2Company.ProductID = Campaign2Product.ProductID INNER JOIN Product2SubBranch (nolock) ON Product2SubBranch.ProductID = Campaign2Product.ProductID INNER JOIN SubBranch (nolock) ON SubBranch.SubBranchID = Product2SubBranch.SubBranchID INNER JOIN Branch (nolock) ON SubBranch.BranchID = Branch.BranchID INNER JOIN Company (nolock) ON Product2Company.CompanyID = Company.CompanyID INNER JOIN Company Manager (nolock) on Campaign.Manager =Manager.CompanyID WHERE (Adv.TransmitDate &gt;= getdate()-7) GROUP BY OperatorTypeName </code></pre> <p>I don't want to create every single query for every single condition since I about 30 possible columns i could create a group by with. I might want to call the sql every time there is a bigger query than the last one, but if i've loaded like 10 columns and than i load only 2 of them in next search, ill get to group it from an sessioned query, But lets start with the basics, How can i get it to work without multiple dozens of cases to create every query manually?</p>
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    1. USJBntis
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    1. COYou've posted up a SQL statement. Are you asking for this to be converted to Linq or do you want a T-SQL solution or something else?
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    2. COI don't need to convert the statement to Linq. Those statements are only for example, I need a way to group by several columns in a dynamic way, They can call a stored procedure, saved query to tables or views, doesn't matter. Just need to know if is it possible to do it or ill have to chain a massive 500+ switch for every possible scenerio of the groupable columns?
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    3. COIt ain't pretty but see http://stackoverflow.com/questions/3929041/dynamic-linq-groupby-multiple-columns
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      1. USPaul Zahra
 

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