C# order by after group by

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WebJan 7, 2015 · You could apply the group by and order by after the union all: Web.Select (group => group.OrderByDescending (student => student.Grade)) It also appears like you might want another flattening operation after that which will give you a sequence of students instead of a sequence of groups: .SelectMany (group => group) crust pizzeria tysons

c# - EF/Linq - Sort collection before grouping - Stack Overflow

Web10. Use select to get the FirstOrDefault (or First - because of the grouping you won't get a null) ordered descending: var data = mydata.GroupBy (item => item.Type) .Select (group => group.OrderByDescending (x => x.Date) .FirstOrDefault ()) .ToList (); Or SelectMany together with Take (1) WebIT Group NW, LLC. Nov 2024 - Present1 year 6 months. Tigard, Oregon, United States. an MSP for 60 clients scattered across the US. front line support takes calls and answers emails from users and ... WebNov 29, 2024 · To do this, we use the group by statement: 1 from e in employees 2 group e by e.GroupCode.ToUpper().Substring(0, 2) into g 3 select new { Location, Total }; csharp. Here, we're taking the first two characters of the GroupCode property of the Employee object and grouping the set by that value into a group set we've designated as g .**. crust pizza website

How to use order by, group by in c#? - tutorialspoint.com

c# - Group collections by their elements property - Code Review …

WebJul 6, 2024 · The Group by clause is often used to arrange the identical duplicate data into groups with the select statement. This clause works with the select specific list of items, for that we can use HAVING, and ORDER BY clauses. Syntax SELECT Column1, Column2 FROM TableName GROUP BY Column1, Column2 Example Select * from … WebUse OrderByDescending on the items in the group: Mains.GroupBy (l => l.ContactID) .Select (g => g.OrderByDescending (l => l.ID).First ()) .ToList (); Also, there is no need for FirstOrDefault when selecting an item from the group; a group will always have at least one item so you can use First () safely. Share Improve this answer Follow crust pizzeria napoletana tysonsWebFeb 18, 2024 · Depending on what you want you can change OrderBy or even can use First or Last in this. list .OrderByDescending (a => a.ValueA) .GroupBy (a => a.GroupId) .Select (g => g.Last ()); Share Follow answered Feb 17, 2024 at 14:16 Chandan Rai 9,511 2 19 28 Thank you .. that was exactly what I needed – Amr Ibrahim Feb 17, 2024 at 14:23 crust pizza tysons corner va

"WebNov 29, 2024 · The GroupBy method is documented as reporting the groups in the order of first appearance, so this ensures that the fastest group comes first. var results = data.OrderBy (x => x.Time) // sort globally by time .GroupBy (x => x.Name) // group by name (best time first) .SelectMany (g => g); // flatten the groups. " - C# order by after group by

C# order by after group by

LINQ with lambda - How do I orderby after groupby?

WebAug 5, 2024 · Order by is used to sort the arrays in the ascending or in the descending order. GroupBy operator belong to Grouping Operators category. This operator takes a … WebOct 7, 2024 · User1966537204 posted Hi I have A List in which list of fees as instance OrginalFees. which is random order. But i need to order it by block inside each block it has to be order by Block then by name. So i used the following code var fees = OrginalFees. OrderBy(x => x.SortOrder). ThenBy(x => x ... · User-707554951 posted Hi lenins, Using …

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WebApr 22, 2024 · Group By Syntax – SELECT function_Name (column_1), column_2 FROM Table_Name WHERE condition GROUP BY column_1, column_2 ORDER BY column_1, column_2; function_Name: Name of the aggregate function, for example: SUM (), AVG (), COUNT () etc. Table_Name: Name of the table. Let’s see the difference between Order … WebMay 7, 2024 · c# linq with group by and join throwing exception. 2 Linq string.Join group values. 1 Selecting distinct rows but always select the last one. 1 get Current record selected in group by lambdada expression. 1 First() could not be translated when accessing first group element (Linq GroupBy) ...

WebSELECT * ORDER BY date ASC, time ASC GROUP BY name (->doesn't work!) now it should give me first mad(has earlier date) then tom ... I had a different variation on this question where I only had a single DATETIME field and needed a limit after a group by or distinct after sorting descending based on the datetime field, but this is what helped me ... Webvar reOrdered = (from x in list group x by x.groupCode into groups select groups) .OrderBy (i => from j in i select j.item) .SelectMany (i => i); but I get an error - "at least one object must IComparable", which puzzles me. Lastly, this must be C# in .Net3.5, no later. c# .net linq .net-3.5 Share Improve this question Follow

WebSep 15, 2024 · In a query expression, the orderby clause causes the returned sequence or subsequence (group) to be sorted in either ascending or descending order. Multiple … WebJul 27, 2024 · The easy SQL is: SELECT COUNT(name), name, info FROM tb_user GROUP BY name ORDER BY id; Tab1: But I need the LAST info!!! Tab2: I use this SQL: SELECT COUNT(name), name, info FROM (SELECT * FROM tb_user ORDER BY id DESC) as tb_temp GROUP BY name ; But that's don't work! All the same:

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WebAug 8, 2016 · items.GroupBy (item => item.Order.Customer) .Select (group => new { Customer = group.Key, Items = group.ToList () }) .ToList () If you want to continue use the overload of GroupBy you are currently using, you can do: items.GroupBy (item => item.Order.Customer, (key, group) => new { Customer = key, Items = group.ToList () }) … crust pizzeria tysons cornerWebThe Group By clause is used to group data based on the same value in a specific column. The ORDER BY clause, on the other hand, sorts the result and shows it in ascending or descending order. It is mandatory to use the aggregate function to use the Group By. On the other hand, it's not mandatory to use the aggregate function to use the Order By. crust pizzeria staten islandWebJul 27, 2024 · As the GROUP BY article states, "If you select a non-grouped column or a value computed from a non-grouped column, it is undefined which row the returned value … crust pizza westonWebNov 29, 2024 · So we have a three-step LINQ query, where we group, and then sort each group, and then sort the groups. var results = data.GroupBy (x => x.Name) // group by name .Select (g => g.OrderBy (x => x.Time)); // sort each group .OrderBy (g => g.First ()) // sort the groups by best time .SelectMany (g => g); // flatten the groups maraschino cherry sauce recipeWebTo order a sequence by the values of the elements themselves, specify the identity function ( x => x in Visual C# or Function (x) x in Visual Basic) for keySelector. Two methods are defined to extend the type IOrderedEnumerable, which … maraschino cherry red lip glossWebTravis Roth Heppner (509) 435-1791 [email protected] Education: Eastern Washington University Computer Science Bachelor of Science Spokane Falls Community College Computer Science ... crust pizza special offersWebAdd a comment. 2. An alternative way to do this could be select distinct PersonId and group join with persons: var result = from id in persons.Select (x => x.PersonId).Distinct () join p2 in persons on id equals p2.PersonId into gr // apply group join here select new { PersonId = id, Cars = gr.Select (x => x.Car).ToList (), }; crust scottsdale