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Asked: 2026-05-11T05:52:59+00:00

I am having some issues throwing together a LINQ query that will join a

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I am having some issues throwing together a LINQ query that will join a table based on a zip code. I need to join the table based on whether the customer’s zip code lies with in a range of zip codes that is determined by ZIPBEG and ZIPEND columns.

The T-SQL would look something like this: 

JOIN [ZipCodeTable] [zips]      ON [customer].[zipcode] BETWEEN [zips].[ZIPBEG] AND [zips].[ZIPEND]  -- or  JOIN [ZipCodeTable] [zips]      ON [zips].[ZIPBEG] <= [customer].[zipcode]          AND [zips].[ZIPEND] >= [customer].[zipcode]
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1 Answer

  1. You can’t specifically join on this condition, the only kind of join that is offically supported is one based on equality, which your condition in T-SQL doesn’t conform to.

    Instead, you will have to perform a cartesian product and then filter on the appropriate conditions:

    from c in customers from z in zips where   z.ZipBeg <= c.ZipCode && c.ZipCode <= z.ZipEnd select   c
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