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Asked: 2026-05-22T11:28:53+00:00

I have a setup on SQL Server 2008. I’ve got three tables. One has

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I have a setup on SQL Server 2008. I’ve got three tables. One has a string identifier as a primary key. The second table holds indices into an attribute table. The third simply holds foreign keys into both tables- so that the attributes themselves aren’t held in the first table but are instead referred to. Apparently this is common in database normalization, although it is still insane because I know that, since the key is a string, it would take a maximum of 1 attribute per 30 first table room entries to yield a space benefit, let alone the time and complexity problems.

How can I write a LINQ to SQL query to only return values from the first table, such that they hold only specific attributes, as defined in the list in the second table? I attempted to use a Join or GroupJoin, but apparently SQL Server 2008 cannot use a Tuple as the return value.

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1 Answer

  1. Editorial Team

    “I attempted to use a Join or
    GroupJoin, but apparently SQL Server
    2008 cannot use a Tuple as the return
    value”.

    You can use anonymous types instead of Tuples which are supported by Linq2SQL.

    IE:

    from x in source group x by new {x.Field1, x.Field2}
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