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- Dictionarydis·tinct/dəˈstiNG(k)t/
adjective
- 1. recognizably different in nature from something else of a similar type: "the patterns of spoken language are distinct from those of writing" Similar Opposite
- 2. readily distinguishable by the senses: "a distinct smell of nicotine"
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Jan 29, 2009 · 96. Starting with .NET 6, there is new solution using the new DistinctBy() extension in Linq, so we can do: var distinctPersonsById = personList.DistinctBy(x => x.Id); The signature of the DistinctBy method: // Returns distinct elements from a sequence according to a specified. // key selector function.
To do this, you need to use an aggregate function to sort on, and use a GROUP BY to make the DISTINCT work. Try something like this: SELECT DISTINCT Category, MAX(CreationDate) FROM MonitoringJob. GROUP BY Category. ORDER BY MAX(CreationDate) DESC, Category. edited Dec 28, 2017 at 15:48.
Mar 31, 2010 · Interesting scenario. As you found, SELECT DISTINCT(a), b, c. is equivalent to: SELECT DISTINCT (a), b, c. is equivalent to: SELECT DISTINCT a, b, c. i.e. the parentheses are treated as expression grouping parentheses. Interestingly, a very similar issue occurs in VB6/VBScript where (for Function (byref x)) Function (x), Function x and Call ...
Dec 27, 2010 · 4. Entity-Framework Select Distinct Name: Suppose if you are using Views in which you are using multiple tables and you want to apply distinct in that case first you have to store value in variable & then you can apply Distinct on that variable like this one.... public List<Item_Img_Sal_VIEW> GetItemDescription(int ItemNo)
Jun 19, 2016 · 11. DISTINCT (or DISTINCTROW) is not a function; it is an option of the SELECT statement that tells MySQL to strip duplicate rows from the resultset generated by the query. By default it returns all the generated rows, including the duplicates. It can also be used together with COUNT() aggregate function (as COUNT(DISTINCT expr)) and it has the ...
Feb 19, 2017 · The reason DISTINCT and GROUP BY work on entire rows is that your query returns entire rows. To help you understand: Try to write out by hand what the query should return and you will see that it is ambiguous what to put in the non-duplicated columns.
Oct 16, 2022 · The standard way to define distinct opaque types is to use incomplete structure declarations. A header used throughout the program simply declares struct foo; struct bar; and so on without saying anything about their contents. Pointers to these are distinct types and may be used by code with no knowledge of the structure contents.
Feb 28, 2013 · This will be O(n) where n is the number of objects in array and m is the number of unique values. There is no faster way than O(n) because you must inspect each value at least on
Nov 30, 2010 · var distinct = items.GroupBy(x => x.ID).Select(x => x.First()); where ID is the property that determines if two objects are semantically equivalent. From the confusion here (including that of myself), the default implementation of Distinct() seems to be a little convoluted.
Nov 15, 2013 · Here I create a subquery with duplicate values, then I do a sum distinct on those values. select DistinctSum=sum(distinct x), RegularSum=Sum(x) from ( select x=1 union All select 1 union All select 2 union All select 2 ) x You can see that the distinct sum column returns 3 and the regular sum returns 6 in this example.
