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Linq get all items in list

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Using the two LINQ methods, this can be implemented as follows. var result = first .Zip (second, (f, s) => new Type [] {a, b}) .SelectMany (x => x); As you can see, we first use Zip to take one element from each of the lists, and combine them into a small array of two elements, and then flatten all those arrays using SelectMany. This ends up. Query vs. Method Syntax in LINQ There are two different types of syntax that you can use to query with LINQ: query syntax and method syntax. In the code samples both types are used, as one becomes familiar with with writing queries one style lends itself better than the other. Group by one property and multiple properties. Apple, Large Fruit Details After Update. Orange, Large. If we want to update the list items based on a condition, we can make use of Where clause. Continuing my series of posts on LINQ, today I want to write about a few of the LINQ extension methods that take multiple input collections and return a single one.. Specifically, I want to take a. My issue is that I want to recursively get ALL child nodes of a particular node in the hierarchy. I get the child nodes quite easily using Linq: var recursiveList = db.ProcessHierarchyItems .Where (x => x.id == id) .SelectMany (x => x.Children); Does anybody know of a clean implementation, that will recursively get all children?.

TypeScript. TypeScript has no equivalent for the language-integrated-natural-query aspect of LINQ. (hey, isn't that literally the whole acronym?) True, you can't write the following LINQ statement in TypeScript. var adultUserNames = from u in users where u.Age >= 18 select u.Name; However, the IEnumerable<T> extension methods, which are at the. In this article. When using LINQ to query non-generic IEnumerable collections such as ArrayList, you must explicitly declare the type of the range variable to reflect the specific type of the objects in the collection. For example, if you have an ArrayList of Student objects, your from clause should look like this: var query = from Student s in. Examples. Use the Except() method to get the result as difference it returns the first list values except the values in the second list. To understand clearly the LINQ except method subtracts the elements from the collection, for example, it removes the element of first list items which present in the second list item, and finally, that will be displayed in the resultant set.. "/>.

When using SequenceEqual to compare two lists or arrays ,the items in the two collections should be the same in the same ordinal.For example if the first list contains the value "A" in the first position then the second list should also contain the value "A" in the first position. Though to compare List elements in C# using LINQ the. Sep 26, 2012 · 5 Answers. Your code works but it will create the list of anonymous object, not string type. Instead of using (a => new { a.Title }, you just use a => a.Title if you just only want to get the title: var myList = db.Items.Where (item => idsOnly.Contains (item.ID.Value)) .Select (a => a.Title).ToList ();. Hello, im unable to get all all/ single selected items in the list. Any help will be appreciated. <SfListBox TValue="List<Team>" DataSource="@projectTeams" TItem="Team">. A list can be accessed by an index, a for/foreach loop, and using LINQ queries. Indexes of a list start from zero. Pass an index in the square brackets to access individual list items, same as array. Use a foreach or for loop to iterate a List<T> collection. Feb 13, 2017 · You begin your outer join query with the collection that you want to get all of the objects from. In my case, I want all of the Customer objects, so I start with the Customers collection. In Visual Basic, the start of my query looks like this: Dim db As New CustomerOrdersContext Dim res = From cust In db.Customers.. Intersect opertor comes under Set operators category in LINQ Query operators. For example, we have two collections A = { 1, 2, 3 } and B = { 3, 4, 5 }. Intersect operator will find common elements in both sequences. { 3 } element is common in both sequences. So Intersect operator only shows one element in the resulting sequence { 3 }. The following are a few things to consider when aiming to improve the performance of LINQ to Entities: Pull only the needed columns. Use of IQueryable and Skip/Take. Use of left join and inner join at the right places. Use of AsNoTracking () Bulk data insert. Use of async operations in entities. I have a Collection of strings (IDs) and I want to check whether a list of objects includes all those Ids. Would the following LINQ query work: ids.All(id => itemsList.Any(item => item.Id == id); Where 'ids' is a Collection<string> and itemsList is a Collection of a more complex object, with a string property 'Id'. In this article. This topic shows an example of how to perform a simple query over a list of Student objects. Each Student object contains some basic information about the student, and a list that represents the student's scores on four examinations. May 20, 2009 · Solution 2. C#. Copy Code. var type = from p in entities.Customers select p; this .Gridview1.DataSource = type; this .GridView1.DataBind (); this code is absolutely fine running at my system. pl make the minor changes that I did. -Sagar Solanki. Posted 26-Sep-11 0:11am. sasolanki007.. Apparently a Transactions instance can have multiple CreditorsDetails. So item.creditors.Select (m => m.CFirstName) will yield an enumeration of creditors names. You can try item.creditors.Select (m => m.CFirstName).FirstOrDefault (), but I suspect there is a flaw in your design. Posted 10-Dec-17 22:28pm.. LINQ Query To List All Table in Entity. May 27, 2011 · We will be writing code to get the list of Addressees of an Employee whose name matches criteria. This employee has to be picked from the list of employees. The code snippet should give you a clear understanding. using System; using System.Collections.Generic; using System.Linq; using System.Text; namespace LinqPOC {. public class Employee {.. Solution: All tree nodes reside in a database table which can be queried directly. The effect that they represent a logical tree or even a cyclic graph can be ignored. Using the Entity Framework the query looks like this: var databaseResult = context.TreeNodes. .Where(t => t.Data > 30).ToList();. Dec 29, 2016 · but i want to use linq query for this....and get data from two table.....some thing like this.....when i'm did this then mu datalist object contain count 0. i'm confuse whats the problem in this code ..... With LINQ you can easily get the first item from an IEnumerable. This throws an exception if the sequence is empty, so FirstOrDefault can be used alternatively. With Python, the "next" method can be used on an iterable (but not on a list). Let's use Python to get the first fruit starting with "p" and to return a default value when our. Get all pai rs in a list using LINQ Slight reformulation of cgeers answer to get you the tuples you want instead of arrays: var combinations = from item1 in list from item2 in list where item1 < item2 select Tuple.Create(item1, item2);. In this article. This topic shows an example of how to perform a simple query over a list of Student objects. Each Student object contains some basic information about the student, and a list that represents the student's scores on four examinations. I am having trouble figuring out how to query a db using linq in c# to get all the objects corresponding to a list or array of ids and put them in a list. For example: I have a table of items. I want to build a method that retrieves all the items whose ids are in a passes array or list. How to find items in one list that are not in another list in C#? LINQ Except operator comes under Set operators category in LINQ. The Except () method requires two collections and finding those elements which are not present in the second collection. Except for the extension, the method doesn't return the correct result for the collection of.

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Finally clear method remove all the items from List collection. Difference between list and dictionary in VB.Net. In VB.Net applications both lists and dictionaries are used to store collections of data. List (ICollection ) is simply a set of items and Dictionary(IDictionary) is a set of key-value pairs. The essential difference therefore is in. This can be addressed using the following LINQ expression: var result = peopleList2.Where (p => !peopleList1.Any (p2 => p2.ID == p.ID)); An alternate way of expressing this via LINQ, which some developers find more readable: var result = peopleList2.Where (p => peopleList1.All (p2 => p2.ID != p.ID));. Examples. Use the Except() method to get the result as difference it returns the first list values except the values in the second list. To understand clearly the LINQ except method subtracts the elements from the collection, for example, it removes the element of first list items which present in the second list item, and finally, that will be displayed in the resultant set.. "/>. Get List<> element position in c# using LINQ. var list = new List<int> { 3, 1, 0, 5 }; int pos = list.IndexOf (list.Min ()); // returns 2. As you specifically asked for a LINQ solution, and all you got was non-LINQ solutions, here's a LINQ solution: List<int> values = new List<int> { 3, 1, 0, 5 }; int index = values .Select ( (n, i) => new .... The LINQ Except () Method in C# works slightly different manner when working with complex types such as Employee, Product, Student, etc. Let us understand this with an example. Create a class file with the name Student.cs and then copy and paste the following code in it. namespace LINQDemo. {. Feb 18, 2022 · In this article. This topic shows an example of how to perform a simple query over a list of Student objects. Each Student object contains some basic information about the student, and a list that represents the student's scores on four examinations.. These are the top rated real world C# (CSharp) examples of Newtonsoft.Json.Linq.JArray.Children extracted from open source projects. You can rate examples to help us improve the quality of examples. private List<ToDoItem> BuildList (List<ToDoItem> todoItems, JArray y) { foreach (var item in y.Children ()) { var itemProperties = item.Children. Subscribe to TutorialsTeacher email list and get latest updates, tips & tricks on C#, .Net, JavaScript, jQuery, AngularJS, Node.js to your inbox. We respect your privacy. HOME. Solution 2. Or you can also do this with a join in case you want to add more conditions etc: Copy Code. var query = from record in records join key in Keys on record.key equals key select record; In case you can have multiple keys for the same record, you can use the Distinct operation. Posted 11-Apr-11 6:23am. LINQ (Language INtegrated Query) is a set of features in C# for concise and declarative code. I use it pretty much wherever I can, but sometimes I wonder and people ask: is this a performance trap. These are the top rated real world C# (CSharp) examples of Newtonsoft.Json.Linq.JArray.Add extracted from open source projects. You can rate examples to help us improve the quality of examples. Programming Language: C# (CSharp) Namespace/Package Name: Newtonsoft.Json.Linq. Class/Type: JArray. Method/Function: Add. Examples at hotexamples.com: 30. A set of extension methods forming a query pattern is known as LINQ Standard Query Operators. As building blocks of LINQ query expressions, these operators offer a range of query capabilities like filtering, sorting, projection, aggregation, etc. LINQ standard query operators can be categorized into the following ones on the basis of their. LINQ Equality Operator: SequenceEqual. There is only one equality operator: SequenceEqual. The SequenceEqual method checks whether the number of elements, value of each element and order of elements in two collections are equal or not. If the collection contains elements of primitive data types then it compares the values and number of elements.

Apr 11, 2011 · Solution 2. Or you can also do this with a join in case you want to add more conditions etc: Copy Code. var query = from record in records join key in Keys on record.key equals key select record; In case you can have multiple keys for the same record, you can use the Distinct operation. Posted 11-Apr-11 6:23am.. Select arrProps).toList. line1 - iterate over the array items and cast it to JObject. line2 - filter the current looped JObject ' properties on the name (starts with DB) and return result as array. line3 - return the filtered properties array and compile it to a list. Oct 01, 2013 · No.. i need to have a for loop for each item in list 1 and need to check with whether list 1 item matches to any of the list 2 elements. ex: Foreach(List item in in _list1) {\ eed to check is there any value item.id, key , position values in _list2 and if it presents return amount, status of that list }. C# - LINQ FirstOrDefault Examples FirstOrDefault is a LINQ functionality to return first element of the collection or default value if requested item does not exist. In case of collection of reference type objects the default is null, whilst in case of value types the default depends on the particular type (e.g. for int it is 0). In this article. This topic shows an example of how to perform a simple query over a list of Student objects. Each Student object contains some basic information about the student, and a list that represents the student's scores on four examinations. //Get a list of skills from the Skill table IEnumerable<Skill> skillenum = skillrepository.Skill; //Get a list of skills the candidate has IEnumerable<CandSkill> candskillenum = candskillrepository.CandSkill .Where(p => p.Candidate_ID == Candidate_ID); //Using the enum lists with LINQ filter out the skills not in the candidate skill list .... These are the top rated real world C# (CSharp) examples of Newtonsoft.Json.Linq.JObject.Remove extracted from open source projects. You can rate examples to help us improve the quality of examples. static IResource CreateResource (JObject jObj, Type resourceType) { // remove _links and _embedded so those don't try to deserialize, because we. }; List<MyClass> result = list1.Where(item. LINQ SelectMany Operator. SelectMany operator is used when we have a sequence of objects which has a collection property and we need to enumerate each item of child collection one by one. SelectMany operator comes under Projection operators category of LINQ Query Operators.. . Your code is asking for the Side object where there are any positions >=1 1 and <=5. It isn't actually filtering the positions down to match that criteria, so your Side is returned with all positions intact. After you get your list of Side objects just iterate through them and remove any that are not in the desired range. Dec 10, 2011 · The Employee class is having lot of properties, i want to update department and location property for all the elements in the list. Right now im using foreach loop to loop through all the items and update each item. Is there any way out using LINQ statement to do this so that i can avoid foreach loop. Thanks in Advance.. Let's say you'd like to make a change to some items in a collection ... and you'd like to do it with LINQ. ... If you're willing to use the ToList method to convert the collection into a List, you can get an even terser statement by using the List object's ForEach method. ... Another option is to use LINQ's Select method. Normally, all we ask. Yes, it's basically the same thing as I did. I assume you included paging to eventually get all items. It's a shame that MS provided possibility to limit fields via view, but we can't actually query items using their properties (like HasUniqueRoleAssignments). ... Filter list with Linq and lookupvalue. 0. CSOM Copy List Items. Hot Network Questions. This article explains how to remove items from list in VB.NET. The Remove method removes the first occurrence of a specific object from a List. The Remove method takes an item as its parameter. The following code snippet removes an item from a List. The RemoveAt method removes an item at the specified zero based index. These are the top rated real world C# (CSharp) examples of Newtonsoft.Json.Linq.JArray.ToObject extracted from open source projects. You can rate examples to help us improve the quality of examples. public void OnTraceComplete (JArray myArray) { // HACK: not sure why we have to explicitly cast the argument from a JArray, I thought Signalr. Dec 11, 2017 · Solution 2. Apparently a Transactions instance can have multiple CreditorsDetails. So item.creditors.Select (m => m.CFirstName) will yield an enumeration of creditors names. You can try item.creditors.Select (m => m.CFirstName).FirstOrDefault (), but I suspect there is a flaw in your design. Posted 10-Dec-17 22:28pm.. List<string> namesToCompare;. classList.Any (item => namesToCompare.Contains (item.Name)) ;. // This will return true if any item in classList has a matching value for Name property in namesToCompare. Replacing .Any with .Where will return those matching items as well if you want to filter and do any further operations on the filtered items. Dec 11, 2017 · Solution 2. Apparently a Transactions instance can have multiple CreditorsDetails. So item.creditors.Select (m => m.CFirstName) will yield an enumeration of creditors names. You can try item.creditors.Select (m => m.CFirstName).FirstOrDefault (), but I suspect there is a flaw in your design. Posted 10-Dec-17 22:28pm.. //Get a list of skills from the Skill table IEnumerable<Skill> skillenum = skillrepository.Skill; //Get a list of skills the candidate has IEnumerable<CandSkill> candskillenum = candskillrepository.CandSkill .Where(p => p.Candidate_ID == Candidate_ID); //Using the enum lists with LINQ filter out the skills not in the candidate skill list .... Linq Select a list base on another list. list inside list in c#. .net linq not in list. linq where in list1 but not list 2. linq query to check in list id is included iin anotjer list. select ids that are not in another list. c# new selectlist other attributes. c# linq objects that contained within list. Is it not possible to do something in linq simliar like . list[0] +=6; list[1] +=6; list[2] +=6; because. I am going to do this for more than 10000 values based on some criteria to all the values in the list. In that case it will create new 10000 values and update it. but still the source will remain same with the old values. }; List<MyClass> result = list1.Where(item. LINQ SelectMany Operator. SelectMany operator is used when we have a sequence of objects which has a collection property and we need to enumerate each item of child collection one by one. SelectMany operator comes under Projection operators category of LINQ Query Operators.. So we will access each info by index in the given list. xlsx') # The workbook object is then used to add new worksheet via the #add_worksheet() method. xlsx") # to get the active work sheet sh = wrkbk. In this case the xl_range function should be what you need: from xlsxwriter. get_rows ¶ Returns a generator for iterating through each row. User615038210 posted Hi i want to fetch all record from table they contain same ANI and currentdate so how can i'm doing this.REVIEW THIS screenshot :i have data some thing like this DateTime currentdate = DateTime.Now.Date; string ANI = "+1"; var dirlist = context.dbsettbl.Where(l => l.ANI ... · User753101303 posted It is still unclear if you have.

Programming Example. All () and Any () method are opposite in nature and used to scan whole list against the condition. Both operators scan whole list's items and returns Boolean (True, False) based on the given condition. All () Method – All () method scans whole list and returns true if all elements match the condition.. The use of Sort() method will bring the List<T> items in ascending order and so the reverse() will change the order that is descending. Using LINQ orderby keyword for sorting a list. The other way of sorting a List<T> is using the Linq in C#. For that, you may use the OrderBy keyword as shown in the example below. c# linq select only unique values from list. If your requirements are to have no duplicates, you should be using a HashSet. HashSet. Add will return false when the item already exists ( if that even matters to you). var uniq = allvalues.GroupBy ( x => x.Id).Select ( y=> y.First ()).Distinct ();. LINQ SYNTAX: FILTERING C# LIST<T> USING WHERE () The L anguage In tegrated Q uery ( LINQ) syntax is a powerful way to work with collections in C#. In this tutorial, you will learn how to use LINQ to filter data from C# lists. You will also learn how to chain LINQ queries together in order to return precisely the data you are interested in. You can also use HashSet to remove duplicates from a list of int or string in C# without Linq, it can collect the elements ... Use Enumerable.Union to get all the elements in the input ... How to get difference between two lists preserving duplicates in C#. Remove all the items from list2 in the list1(if existed). var list1 = new List<string.

All() and Any() method are opposite in nature and used to scan whole list against the condition. Both operators scan whole list's items and returns Boolean (True, False) based on the given condition.. All() Method - All() method scans whole list and returns true if all elements match the condition. If any of them doesn't fulfil the condition then it returns false. 2D Array. Foreach We use IEnumerable and the foreach-loop to access, in sequence, all items in a 2D array. We can abstract the loop itself out. Here This example shows the yield contextual keyword in a method that returns IEnumerable<T>. Generic The return value is a generic IEnumerable collection of ints. The category or the ISBN acts a key for grouping. Count with Query Syntax. IEnumerable<int> items = new List <int> { 10, 20, 30, 40, 50, 100 }; int count = (from n in items select n).Count (); Count method will be used as last method call in the linq query, there should not be any other method after that count call. You’re mixing the two and asking string Contains to report on whether the string Contains an array etc. You need to be using the LINQ Contains all the time, which means splitting your Tags on comma and then asking if the resulting array of strings contains all of the array of strings resulting from splitting the queryTags on comma too. Accepted Answer. If I assume correctly, you must have a one-to-many relationship between ReleaseVersions and ReleaseNotes, which means that there should be a navigation property in the ReleaseVersion class referring to the collection of ReleaseNotes, enabling you to rewrite your code like this: var model = _DbContext.ReleaseVersions .Include. Apr 28, 2022 · linq get item. c# find all indexes. c# findindex. get index of array element without indexof c#. Get Index position of an element in a list in c#. find index of combobox index c#. asp mvc list index. c# get the index of an integer in a list of integers. get the index of an element in a list c# when string equals.. This article explains how to remove items from list in VB.NET. The Remove method removes the first occurrence of a specific object from a List. The Remove method takes an item as its parameter. The following code snippet removes an item from a List. The RemoveAt method removes an item at the specified zero based index. var myList = db.Items.Where (item => idsOnly.Contains (item.ID.Value)) .Select (a => a.Title).ToList (); cuongle Popular Answer You can use a Join var titlesInIdList = from item in db.Items join id in idsOnly on item.ID.Value equals id select item.Title; var list = titlesInIdList.ToList (); Tim Schmelter Fastest Entity Framework Extensions. The LINQ Promenade is Caesars Entertainment's shopping, dining and entertainment district located at the center of the Las Vegas Strip which is home to 35+ restaurant and retail stores such as Brooklyn Bowl, Gordon Ramsay Fish and Chips, IN-N-Out Burger, Razer, Yard House, and so much more! You can find exciting attractions at The LINQ.

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. C# - LINQ Where Examples. Where is a LINQ functionality to filter data in a query with given criteria. Each of below examples is presented in C# with both Lambda and Query expression. 1. Collection of strings - single condition. Query collection to get items which start with "b". 1. Example1: LINQ Distinct Method on Value Type. Here we have an integer collection that contains duplicate integer values. Our requirement is to fetch remove the duplicate values and return only the distinct values as shown below. The following program shows how to get the distinct integer values using both Method and Query syntax:. Sep 26, 2012 · 5 Answers. Your code works but it will create the list of anonymous object, not string type. Instead of using (a => new { a.Title }, you just use a => a.Title if you just only want to get the title: var myList = db.Items.Where (item => idsOnly.Contains (item.ID.Value)) .Select (a => a.Title).ToList ();.

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Here are the examples of the csharp api class Newtonsoft.Json.Linq.JToken.Values() taken from open source projects. By voting up you can indicate which examples are most useful and appropriate. These are the top rated real world C# (CSharp) examples of Newtonsoft.Json.Linq.JArray.Children extracted from open source projects. You can rate examples to help us improve the quality of examples. private List<ToDoItem> BuildList (List<ToDoItem> todoItems, JArray y) { foreach (var item in y.Children ()) { var itemProperties = item.Children. Dec 29, 2016 · but i want to use linq query for this....and get data from two table.....some thing like this.....when i'm did this then mu datalist object contain count 0. i'm confuse whats the problem in this code ..... Simple single line concatenation of String list can be done with String.Join as following. String colorNames = String.Join (";", Enum.GetNames (typeof (ConsoleColor))); This applies to .NET framework 4.0 onwards. Older versions of .NET framework will not accept IEnumerable<String> as a parameter, so you need to do additional cast to an Array. Given below are few examples of LINQ where code the list of elements in the collection. 1. Sequence of strings with single condition. ... We can display the result by using foreach to listing the items, the output will be C and C++. foreach(var items in result) console.WriteLine(item); 2. Sequence of strings with multiple conditions. }; List<MyClass> result = list1.Where(item. LINQ SelectMany Operator. SelectMany operator is used when we have a sequence of objects which has a collection property and we need to enumerate each item of child collection one by one. SelectMany operator comes under Projection operators category of LINQ Query Operators. C# Linq ForEach Where - Execute an action foreach item in a collect where a condition is true. The example above will perform the WriteLine method on every item in a list. Sometimes though, you only want to perform such an action on certain items. This is easy to do by using a where clause to filter the items, before using foreach. I want a LINQ query to work with Entity Framework to List All the Tables in Datamodel. i.e. Same as " Select * from SysObjects where xtype='U' " in SQL Server or " Select * from tab" in Oracle. Posted 15-Sep-13 8:10am. Select operator is mainly used to retrieve all properties or only a few properties which we need to display. It is used to select one or more items from the list of items or from the collection. We can retrieve the result as per our requirement using LINQ Select. By using the Select operator, we can shape the data as per our needs. A set of extension methods forming a query pattern is known as LINQ Standard Query Operators. As building blocks of LINQ query expressions, these operators offer a range of query capabilities like filtering, sorting, projection, aggregation, etc. LINQ standard query operators can be categorized into the following ones on the basis of their. LINQ query expression to get maximal item in the collection. var list = new List < int > { 1, 8, 3, 2 }; int maxNumber = .... We need to specify on which item the join will occur because LINQ needs to know which element(s) of the Car object we are looking to match. Here we want the Model to match. If we look at our two collections and remember what the inner join is about which is to find common elements, we can guest that the two common models are BRZ and FRS.

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Here I’ll walk you through Except, a Linq extension method that you can use to get objects from one List that don’t exist in another. I’ll also explain how you can use the same approach on dictionaries and I’ll touch on other similar set based methods like Union, Concat and Intersect. ... Using Except with Dictionaries (i.e. Get Items ...
System.Linq gives us many methods that act upon IEnumerables. Interface. Query example. Here we use IEnumerable as the return value of a query expression. We use it with foreach-loops, and also call extension methods on it. ... in sequence, all items in a 2D array. We can abstract the loop itself out. Here This example shows the yield ...
Updating lists. A list has a lot of properties to update and updating them comes down to setting the new property value and then calling one of the update methods like UpdateAsync. // Get the list to update var myList = await context.Web.Lists.GetByTitleAsync ("List to update"); // Update a list property myList.Description = "PnP Rocks!";
Count with Query Syntax. LINQ query expression to count number of all items in the collection. IEnumerable < int > items = new List < int > { 8, 3, 2 }; int count = ( from x in items select x). Count (); // count: 3. LINQ query expression to count number of items which match specified predicate.
Example1: LINQ Distinct Method on Value Type. Here we have an integer collection that contains duplicate integer values. Our requirement is to fetch remove the duplicate values and return only the distinct values as shown below. The following program shows how to get the distinct integer values using both Method and Query syntax: