Question

I have two log tables in seperate SQL Server databases (on different servers). The two tables have exactly the same schema. In my .NET application I can create two Linq to SQL class collections (DBML files) and then do my own custom Linq queries to union the two tables and return an anonymous type. But I have several queries (all slightly different) on the same tables and doing the unions every time is repetitive.

Is it possible to union the two tables into a single concrete/named type IEnumerable? Basically what I’d like to do is something like:

var logs = Logs.Where(l => l.TimeStart >= DateTime.Today)

And have Logs actually return data from two tables and have sensible queries sent to the two database servers no matter what I put in the .Where().

Is this possible?

Answer 1

I believe that out of the box you cannot get one IQueryable covering multiple datacontexts. You mention you have

seperate SQL Server databases (on different servers).

A solution might be to create a linked view. Example: Create View using Linked Server db in SQL Server

Once you have the linked view, the query will be fairly simple and straigtforward.