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POJoining queries with Entity Framework
 

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    <p>I have the table</p> <p><strong>MOVIES_RATING:</strong> </p> <ul> <li><code>MovieID int</code></li> <li><code>MovieRating decimal</code></li> </ul> <p>I'd like to get 2 values using one query:</p> <pre><code>select COUNT(*) FROM [dbo].[MOVIES_RATING] where [dbo].[MOVIES_RATING].[MovieID] = 78 </code></pre> <p>and</p> <pre><code>select SUM([dbo].[MOVIES_RATING].Rating) FROM [dbo].[MOVIES_RATING] where [dbo].[MOVIES_RATING].[MovieID] = 78 </code></pre> <p>That's what I got in LINQ:</p> <pre><code>(from p in ef.MOVIES_RATING.Where(r =&gt; r.MovieID== movie_id) let movieRates = ef.MOVIES_RATING.Where(r =&gt; r.MovieID == movie_id) let count = movieRates.Count() let averageUserRating = movieRates.Sum(c =&gt; c.MOVIES_RATING)/count select new MovieRating {AverageUserRating = averageUserRating, VoteCount = count}) .Take(1); </code></pre> <p>Looks awful as well as SQL being generated:</p> <pre><code>SELECT [Limit1].[MovieID] AS [MovieID], [Limit1].[C2] AS [C1], [Limit1].[C1] AS [C2] FROM ( SELECT TOP 1 [GroupBy1].[A1] AS [C1], [Extent1].[MovieID] AS [MovieID], [GroupBy2].[A1] / CAST( [GroupBy1].[A1] AS decimal(19,0)) AS [C2] FROM [dbo].[MOVIES_RATING] AS [Extent1] CROSS JOIN (SELECT COUNT(1) AS [A1] FROM [dbo].[MOVIES_RATING] AS [Extent2] WHERE [Extent2].[MovieID] = 78 ) AS [GroupBy1] CROSS JOIN (SELECT SUM([Extent3].[Rating]) AS [A1] FROM [dbo].[MOVIES_RATING] AS [Extent3] WHERE [Extent3].[MovieID] = 78 ) AS [GroupBy2] WHERE [Extent1].[MovieID] = 78 ) AS [Limit1] </code></pre> <p>I'm not sure it is best solution, so any help is appreciated.</p> <p>I know It can be done using stored procedure, but if its could be done using LINQ it would be better.</p>
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