Join ienumerable and iqueryable for each
For the record, out of curiosity I tried your NuGet package, but doing something similar to the example in your blog, I couldn't get it working with EF-core 2. Thank you for that. It is the same as inner join of SQL. Sign up using Facebook. Points to Remember :. It returns a new collection that contains common elements from two collections whosh keys matches. Also, maybe you could add an answer to this question and have my vote - again. You obviously want to benefit from both strands of data reduction.
When you have a large IEnumerable and want to join on a database, and the data is too much to embed in a query using Contains or. › questions › linq-performance-question-when-j.
c Joining to in memory List Code Review Stack Exchange
In your first scenario: first it joins all the records in A which would take long time to join, then filters out for riable.
In your second scenario you have a.
Joining to in memory List Ask Question. But in the second case the Entity Framework will make the sql a little bit better by making the last join into a virtual select or completely taking it off and adding it as where in.
Featured on Meta. The only change is that I filter the Enumerable list beforehand, the A enumerable has about 30 items before filtering and 15 after filtering.
c LINQ performance question when joining IEnumerable with IQueryable Stack Overflow
Upvotes on questions will now be worth the same as upvotes on answers. In your second scenario you have a smaller subset of records for A prior to joining - of course this would take less time to join.
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|And btw EF Core does some job locally automatically Joining to in memory List Ask Question.
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Video: Join ienumerable and iqueryable for each Part 24 Left Outer Join in LINQ
The last parameter in Join method is an expression to formulate the result. Id equals c. My list will most likely never be greater than records.
Video: Join ienumerable and iqueryable for each IEnumerable vs. IQueryable - LINQ Specific Programming Constructs
A function to extract the join key from each element of the first sequence. Also learn the differences between IEnumerable and IQueryable. and importance of each one - IQueryable, Queryable, IEnumerable.
Pretty much like it says, use Contains.
If you join it with offices, Entity Framework will throw not quite.
Joining an IQueryable with an IEnumerable Michaël’s coding thoughts
High contrast. The following example joins two string collection and return new collection that includes matching strings in both the collection.
First parameter in Join method is used to specify the inner sequence which is standardList in the above example. And for me then it would be big list more than and would cross it limit.
Secondly, while the total number of offices may be aroundI may be able to filter that list to be less since a user pulling this information will almost never need all of the results.
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