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LINQ - Query Operators. 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 ....

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Instead beginning the query by what you want, forcing you to twist and turn your query to conform to that statement. LINQ basically lets you drill into the data and select from "what I have available now" instead of "nop, this query doesn't output what you said you wanted at the start, too bad." 5. level 2. Totalmace. So this doesn't meet requirement of getting object with distinct Code value. Way 1 : Make use of MoreLinq Library. First way to achieve the requirement is make use of MoreLinq Library, which support function called DistinctBy in which you can specify the property on which you want to find Distinct objects. Below code is shows the use of the. Aug 16, 2011 · Mixed syntax means query expression syntax is mixed with fluent method calls, for example it can be used to get the distinct values, first result or to get items as array (which by the way will trigger immediate query execution).

The central object in LINQ to SQL is the DataContext. The DataContext is sort of like an C To create the demo based on the Northwind database follow these steps: Starting with a Console Application add a LINQ to SQL item from the Add New Items dialog (see Figure 1) Expand the Server Explorer and drag a table onto the DBML designer-see Figure 2. Example: Distinct C# IList < string > strList = new List < string >(){ "One" , "Two" , "Three" , "Two" , "Three" }; IList < int > intList = new List < int >(){ 1, 2, 3, 2, 4, 4, 3, 5 }; var distinctList1 = strList.Distinct(); foreach ( var str in distinctList1) Console .WriteLine(str); var distinctList2 = intList.Distinct(); foreach ( var i in distinctList2) Console .WriteLine(i);. The SQL SELECT DISTINCT Statement. ... Inside a table, a column often contains many duplicate values; and sometimes you only want to list the different (distinct) values. SELECT DISTINCT Syntax. SELECT DISTINCT column1, column2, ... FROM table_name; Demo Database. Below is a selection from the "Customers" table in the Northwind sample database:.

Jun 02, 2015 · For example get the distinct Make values such as Samsung, Apple, HTC, Nokia and Sony and then populate the result to a DropDownList control for filtering purposes. I was hoping that the Distinct() method has an overload that can compare values based on a property or field like GetProducts().Distinct(o => o.PropertyToCompare) , but then again ....

The following example shows how to use LINQ method syntax query with the IEnumerable<T> collection. As name suggest, Method Syntax is like calling extension method. LINQ Method Syntax aka Fluent syntax because it allows series of extension methods call. Implicitly typed variable - var can be used to hold the result of the LINQ query. In this tutorial, you will learn: What are Average, Count, Max, Min, Sum, First, Last, Contains, ElementAt and Distinct method in LINQ. Programming Example. Average () - Average Method calculates the average value of numeric data. Count () – Count method count the present items in list. Max () – It picks the maximum numeric values from the. View Answer. 5. Point out the wrong statement. a) Compared to SQL, LINQ is complex, tidier, and lower-level. b) LINQ supports ad hoc join. c) Another benefit of LINQ is that you can query across relationships without having to join. d) None of the mentioned. View Answer. 6. I often find complex Linq queries that span over 10-15 lines in our code base. I find such queries hard to understand and.

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c# linq select only unique values from list. c# get distinct values all fields from list. c# linq list select. c# linq distinct group by nested list. c# distinct by property. linq select. get distinct from datatable c#. c# linq unique by property. c# linq select as new object.

c# linq select only unique values from list. c# get distinct values all fields from list. c# linq list select. c# linq distinct group by nested list. c# distinct by property. linq select. get distinct from datatable c#. c# linq unique by property. c# linq select as new object.

What is LINQ? LINQ is a uniform query language, introduced with .NET 3.5 that we can use to retrieve data from different data sources. These data sources include the collection of objects, relational databases, ADO.NET datasets, XML files, etc. Different Steps of a LINQ Query Operation. Let’s explore the three distinct steps of a LINQ query. 6 Comments. on LINQ to SQL using GROUP BY and COUNT (DISTINCT) I have to perform the following SQL query: select answer_nbr, count (distinct user_nbr) from tpoll_answer where poll_nbr = 16 group by answer_nbr. The LINQ to SQL query. from a in tpoll_answer where a.poll_nbr = 16 select a.answer_nbr, a.user_nbr distinct.

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Distinct by property of class with LINQ; Distinct in Linq based on only one field of the table; LINQ Select Distinct with Anonymous Types; Apply function to all elements of collection through LINQ; Distinct not working with LINQ to Objects; LINQ query to return distinct field values from list of objects; Determine if a sequence contains all.

In the search for a Distinct-function for LINQ upon finding this question and realizing it doesn't exist, my workaround is by using GroupBy(). The obvious problem is that the distinct-set doesn't contain all the data (say you have three.

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Here are some of the advantages of method syntax: Query syntax is automatically converted to method syntax at compilation time; Not all LINQ methods can be utilized with query syntax; Method syntax is stylistically more similar to other C# code; Method syntax exercise. This is the exact same exercise as in the previous lesson.. Nov 05, 2019 · The select syntax in LINQ is similar to select clause of SQL. Here is a simple select. Dim q As IEnumerable(Of String) = From s In names Select s. In the above statement, I select n in names. Now using Distinct operator. For Each s As [String] In q.Distinct Example 1.

LINQ - Query Operators. 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. . Here is an example of Dynamic LINQ example for Distinct: IQueryable queryable = new [] { 1 , 2 , 2 , 3 }.AsQueryable(); var distinctIntegerValues = queryable.Distinct(); Or you can use this inside a Dynamic LINQ query:.

What is LINQ? LINQ is a uniform query language, introduced with .NET 3.5 that we can use to retrieve data from different data sources. These data sources include the collection of objects, relational databases, ADO.NET datasets, XML files, etc. Different Steps of a LINQ Query Operation. Let’s explore the three distinct steps of a LINQ query.

Distinct by property of class with LINQ; Distinct in Linq based on only one field of the table; LINQ Select Distinct with Anonymous Types; Apply function to all elements of collection through LINQ; Distinct not working with LINQ to Objects; LINQ query to return distinct field values from list of objects; Determine if a sequence contains all. Jan 18, 2021 · But, LINQ has an API syntax, using extensions methods on the IEnumerable type, and a query syntax, using a SQL-like syntax. LINQ is declarative. LINQ is declarative. It means we write our code stating the results we want instead of doing every step to get those results. With LINQ, we write code to “filter a collection based on a condition.”.

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C# LINQ. LINQ stands for Language-Integrated Query. LINQ helps to remove the technical difficulties while using databases with .NET programming languages. It provides a solution for the problem of object-relational mapping, and simplifies the interaction between objects and data sources. LINQ is a structured query and it integrated in C# and VB. c# linq select only unique values from list. C# .NET Core linq Distinct. select distinct linq mvc. .netstandard distinctby iqueryable. c# get distinct values all fields from list. get distinct from datatable c#. c# linq unique by property. c# distinct array of objects by values. c# linq distinct group by nested list. c# linq select only unique values from list. C# .NET Core linq Distinct. select distinct linq mvc. .netstandard distinctby iqueryable. c# get distinct values all fields from list. get distinct from datatable c#. c# linq unique by property. c# distinct array of objects by values. c# linq distinct group by nested list.

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var distinct = list.DistinctBy(x => x.typeID); This only works for LINQ to Objects though. You can use a grouping or a lookup, it's just somewhat annoying and inefficient: var distinct = list.GroupBy(x => x.typeID, (key, group) => group.First());. Nov 05, 2019 · The select syntax in LINQ is similar to select clause of SQL. Here is a simple select. Dim q As IEnumerable(Of String) = From s In names Select s. In the above statement, I select n in names. Now using Distinct operator. For Each s As [String] In q.Distinct Example 1.

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Here is the syntax of LINQ to SQL Select Query. EmployeeDBDataContext db = new EmployeeDBDataContext (); var result = from ed in db.EmployeeDetails. select new. {. EmployeeName = ed.EmpName, Location = ed.Location. }; With the above syntax, we are getting the records from the " EmployeeDetails " table using LINQ to SQL Select Query. using System; using System.Linq; namespace LINQDemo { class Program { static void Main(string[] args) { //Creating an instance of StudentComparer StudentComparer studentComparer = new StudentComparer(); //Using Method Syntax var MS = Student.GetStudents() .Distinct(studentComparer).ToList(); //Using Query Syntax var QS = (from std in Student.GetStudents() select std) .Distinct(studentComparer).ToList(); foreach (var item in QS) { Console.WriteLine($"ID : {item.ID} , Name : {item.Name. Dec 29, 2020 · I have to write a query in linq,to find list of persons whose name will contain these three letter a or b or c. Kindly Help me on this. a,b,c is the text entered in textbox by user,user can enter anything he can enter ab,c in this I will have to find list.

Find() In addition to LINQ extension methods, we can use the Find() method of DbSet to search the entity based on the primary key value.. Let's assume that SchoolDbEntities is our DbContext class and Students is the DbSet property.. var ctx = new SchoolDBEntities (); var student = ctx.Students.Find(1); . In the above example, ctx.Student.Find(1) returns a student record whose StudentId is 1 in. What is LINQ? LINQ is a uniform query language, introduced with .NET 3.5 that we can use to retrieve data from different data sources. These data sources include the collection of objects, relational databases, ADO.NET datasets, XML files, etc. Different Steps of a LINQ Query Operation. Let’s explore the three distinct steps of a LINQ query. CQLinq, Code Query LINQ, is a feature proposed by the tool NDepend since the version 4, to query .NET code through LINQ queries. A CQLinq query is a LINQ query that relies on types defined in the namespace NDepend.CodeModel of the NDepend.API . CQLinq syntax peculiarities are: Introduction. CQLinq Query edition. Nov 05, 2019 · The select syntax in LINQ is similar to select clause of SQL. Here is a simple select. Dim q As IEnumerable(Of String) = From s In names Select s. In the above statement, I select n in names. Now using Distinct operator. For Each s As [String] In q.Distinct Example 1.

Sum with Query Syntax . LINQ query expression to get sum of numeric values in the collection. var list = new List < int > { 8, 2, 6, 3 }; int sum = (from x in list select x).Sum(); // sum: 19. LINQ query expression to get sum of numbers which match specified predicate.. LINQ - Query Operators. 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 ....

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using System; using System.Linq; namespace LINQDemo { class Program { static void Main(string[] args) { //Creating an instance of StudentComparer StudentComparer studentComparer = new StudentComparer(); //Using Method Syntax var MS = Student.GetStudents() .Distinct(studentComparer).ToList(); //Using Query Syntax var QS = (from std in Student.GetStudents() select std) .Distinct(studentComparer).ToList(); foreach (var item in QS) { Console.WriteLine($"ID : {item.ID} , Name : {item.Name.

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Oct 07, 2021 · I am converting all my traditional SQL Queries to 'LINQ to SQL'. By enlarge I have no problems unless query contains either 'Distinct' or 'multiple joins', more so when they contain both. Can anyone help converting query below? Also, can anyone advice of a tool (preferably free) that can assist me in converting other future queries?.

The central object in LINQ to SQL is the DataContext. The DataContext is sort of like an C To create the demo based on the Northwind database follow these steps: Starting with a Console Application add a LINQ to SQL item from the Add New Items dialog (see Figure 1) Expand the Server Explorer and drag a table onto the DBML designer-see Figure 2. 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. I am converting all my traditional SQL Queries to 'LINQ to SQL'. By enlarge I have no problems unless query contains either 'Distinct' or 'multiple joins', more so when they contain both. Can anyone help converting query below? Also, can anyone advice of a tool (preferably free) that can assist me in converting other future queries?.

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Example1: The following example shows the use of the LINQ Union () Method using both Method and Query Syntax to fetch all the elements from both the collections by removing the duplicate elements. using System.Collections.Generic; using System; using. LINQ Distinct Query. I have a C# application that loads a List of CLR objects called "Tasks". Each Task has the following properties: public int ID { get; set; } public int TypeID { get; set; } public string TypeName { get; set; } public string Name { get; set; } I am trying to find the unique types of tasks in this list. How to write distinct query in from linq syntax; linq query by distinct; linq c# distinct into; linq c# distinctby; linq get distinct from table; get unique records using linq c#; get unique values in column linq; how to get distinc value in LINQ; how to get unique value in LINQ; lin q select distinct; linq command to find unique values in list. Query Syntax in LINQ Example. In this tutorial we learn about LINQ query syntax using C# . in earlier tutorials we have already discussed about method syntax and lambda expression in LINQ, here we have created a student list, so we can use the list object in example below, var studentsStream = new List<Student> { new Student { FullName = "Aruna.

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Trying to figure out the right way to express the following SQL in a linq statement and getting nowhere. select messageid, comment from Message where isactive = 1 and messageid in ( select messageid from org.Notification where NotificationTypeId = 7 and orguserid in ( select OrgUserId from org.OrgUser where OrgId in ( select ChildOrgId from OrgRelation where ParentOrgId = 10001 ) ) group by.

In this tutorial, you will learn: What are Average, Count, Max, Min, Sum, First, Last, Contains, ElementAt and Distinct method in LINQ. Programming Example. Average () - Average Method calculates the average value of numeric data. Count () – Count method count the present items in list. Max () – It picks the maximum numeric values from the ....

XPO, LINQ and Distinct In a recent forum post, Dusan Pupis mentioned that our LINQ support didn't currently include the Distinct extension method.I looked into this and I found a pretty complex situation that requires some explanation. First, in XPO 8.1.1, we do in fact support Distinct(), i.e. the overload that doesn't take any further parameters, in some situations. LINQ provides the new way to manipulate the data, whether it is to or from the database or with an XML file or with a simple list of dynamic data. LINQ is a uniform query system in C# to retrieve the data from different sources of data and formats. It is integrated with C# to eliminate the mismatch between programming language and database.

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Nov 15, 2013 · Now my intention is to prepare a LINQ Query to select a distinct value from a datatable. In C# My Query. Copy Code. var ProjLnkQry = ( from P in MyClass1.ProjTbl.AsEnumerable () select P [ "proj_name" ]).Distinct ().ToList (); The above query I try to convert it into VIsual C++..

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Dec 29, 2020 · I have to write a query in linq,to find list of persons whose name will contain these three letter a or b or c. Kindly Help me on this. a,b,c is the text entered in textbox by user,user can enter anything he can enter ab,c in this I will have to find list.

Nov 15, 2013 · Now my intention is to prepare a LINQ Query to select a distinct value from a datatable. In C# My Query. Copy Code. var ProjLnkQry = ( from P in MyClass1.ProjTbl.AsEnumerable () select P [ "proj_name" ]).Distinct ().ToList (); The above query I try to convert it into VIsual C++..

First (); /*Note: - LINQ uses deferred execution, this means that the 'query' statement only defines the LINQ statement - The LINQ query is not executed until its result is required - Calling an operator on the query will cause the query to execute. In this case, it is the First method. Feb 14, 2021 · LINQ Distinct () – By Field The Distinct () function in LINQ can be applied on the fields of tables also. This will group the similar data of the given field and return the unique list by selecting the first or default of the group depending on the requirement. yourTable.GroupBy(x => x.TableFieldColumn).Select(x => x.FirstOrDefault());. Distinct() The result of executing the query is the same with or without the Distinct() clause added - duplicates are returned from the query. I'm assuming I need to pass something of the IEqualityComparer(Of T) variety to the Distinct() method, but am uncertain as to the correct syntax. I greatly appreciate any help. In this tutorial, you will learn: What are Average, Count, Max, Min, Sum, First, Last, Contains, ElementAt and Distinct method in LINQ. Programming Example. Average () - Average Method calculates the average value of numeric data. Count () - Count method count the present items in list. Max () - It picks the maximum numeric values from the. Now my intention is to prepare a LINQ Query to select a distinct value from a datatable. In C# My Query. Copy Code. var ProjLnkQry = ( from P in MyClass1.ProjTbl.AsEnumerable () select P [ "proj_name" ]).Distinct ().ToList (); The above query I try to convert it into VIsual C++.

Microsoft Entity Framework (EF) is a powerful tool for data modeling. EF works with LINQ to query data using class objects. These class objects are basically classes that map to your database tables. Instead of flipping back and forth. 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.

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In this tutorial, you will learn: What are Average, Count, Max, Min, Sum, First, Last, Contains, ElementAt and Distinct method in LINQ. Programming Example. Average () - Average Method calculates the average value of numeric data. Count () – Count method count the present items in list. Max () – It picks the maximum numeric values from the ....

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To use LINQ queries you need to import System.Linq. The Method Syntax is more powerful and flexible, but the Query Syntax may be simpler and more familiar. All queries written in Query syntax are translated into the functional syntax by the compiler, so performance is the same. Query objects are not evaluated until they are used, so they can be ....

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How to write distinct query in from linq syntax; linq query by distinct; linq c# distinct into; linq c# distinctby; linq get distinct from table; get unique records using linq c#; get unique values in column linq; how to get distinc value in LINQ; how to get unique value in LINQ; lin q select distinct; linq command to find unique values in list. select distinct values linq c#. select mn id with distinct records in linq c#. Distinct<TSource> (this IEnumerable<TSource> source, IEqualityComparer<TSource> comparer) make distinct on specific values in linq c#. c# count distinct values linq. select. using System; using System.Linq; namespace LINQDemo { class Program { static void Main(string[] args) { //Creating an instance of StudentComparer StudentComparer studentComparer = new StudentComparer(); //Using Method Syntax var MS = Student.GetStudents() .Distinct(studentComparer).ToList(); //Using Query Syntax var QS = (from std in Student.GetStudents() select std) .Distinct(studentComparer).ToList(); foreach (var item in QS) { Console.WriteLine($"ID : {item.ID} , Name : {item.Name ....

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Linq distinct example, how to use linq distinct method in linq query, linq distinct to remove duplicate element from collection, using linq distinct on custom property name, get distinct object list. ... Here are the Distinct operator syntax, we also can create our extension methods. public static IEnumerable<TSource> Distinct<TSource>. To find distinct values using query syntax, GroupBy operator of LINQ is used as below: var uniqueOrders = orders.GroupBy (x => new { x.location }).Select (x => x); 3. Using IEqualityComparer Interface We create a class implementing IEqualityComparer to provide the Distinct method the logic on the basis of which it can to the comparison.

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LINQ - writing a query with distinct and orderby; LINQ Query with both CASE statement and SUM function; Dynamic query with LINQ won't work; Performance improvement for linq query with distinct; Distinct in join query with linq; Linq query with MongoDB works does not work as Func; Linq to Sql - Query list of distinct items with multiple joins. Search: Linq Contains Multiple Values. Multiple items module Set from Microsoft LINQ also provides computational methods The values of the string [] array would be numbers like (1,45,20,10,etc) the Default for The type of an integer literal is defined by one of the integer qualifiers (U - UInt32, L - Int64, UL - UInt64) or type is deduced by first of the types Int32, UInt32,. To find distinct values using query syntax, GroupBy operator of LINQ is used as below: var uniqueOrders = orders.GroupBy (x => new { x.location }).Select (x => x); 3. Using IEqualityComparer Interface. We create a class implementing IEqualityComparer to provide the Distinct method the logic on the basis of which it can to the comparison.. LINQ Distinct () – By Field The Distinct () function in LINQ can be applied on the fields of tables also. This will group the similar data of the given field and return the unique list by selecting the first or default of the group depending on the requirement. yourTable.GroupBy(x => x.TableFieldColumn).Select(x => x.FirstOrDefault());.

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LINQ Syntax. LINQ is an acronym of “ Language Integrated Query ” and its main feature is to allow users to write SQL style of queries within code using query syntax. .NET framework (3.5 or Higher) provides a set of built-in query keywords in LINQ to allow users to write SQL style of queries within code. There are two ways in which we can .... I am converting all my traditional SQL Queries to 'LINQ to SQL'. By enlarge I have no problems unless query contains either 'Distinct' or 'multiple joins', more so when they contain both. Can anyone help converting query below? Also, can anyone advice of a tool (preferably free) that can assist me in converting other future queries?. adidas trainers; mobile homes for rent no credit check near voronezh; chain come along; how to reset new york times article count; how to draw a nut and bolt. In this tutorial, you will learn: What are Average, Count, Max, Min, Sum, First, Last, Contains, ElementAt and Distinct method in LINQ. Programming Example. Average () - Average Method calculates the average value of numeric data. Count () – Count method count the present items in list. Max () – It picks the maximum numeric values from the .... Linq distinct example, how to use linq distinct method in linq query, linq distinct to remove duplicate element from collection, using linq distinct on custom property name, get distinct object list. ... Here are the Distinct operator syntax, we also can create our extension methods. public static IEnumerable<TSource> Distinct<TSource>.

Distinct operator is only available in Method Syntax and not available in Query Syntax. Below is the syntax of Distinct operator. public static IEnumerable<TSource> Distinct<TSource>(this IEnumerable<TSource> source); public static IEnumerable<TSource> Distinct<TSource>(this IEnumerable<TSource> source, IEqualityComparer<TSource> comparer);. The following example shows how to use LINQ method syntax query with the IEnumerable<T> collection. As name suggest, Method Syntax is like calling extension method. LINQ Method Syntax aka Fluent syntax because it allows series of extension methods call. Implicitly typed variable - var can be used to hold the result of the LINQ query.

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c# linq select only unique values from list. C# .NET Core linq Distinct. select distinct linq mvc. .netstandard distinctby iqueryable. c# get distinct values all fields from list. get distinct from datatable c#. c# linq unique by property. c# distinct array of objects by values. c# linq distinct group by nested list.

The example uses the query and the method syntax to find out all words that contain the 'a' character. The LINQ extension methods are available in the System.Linq namespace. // Query syntax var res = from word in words where word.Contains('a') select word; This is the query syntax; it is similar to SQL code.

LINQ - writing a query with distinct and orderby; LINQ Query with both CASE statement and SUM function; Dynamic query with LINQ won't work; Performance improvement for linq query with distinct; Distinct in join query with linq; Linq query with MongoDB works does not work as Func; Linq to Sql - Query list of distinct items with multiple joins.

View Answer. 5. Point out the wrong statement. a) Compared to SQL, LINQ is complex, tidier, and lower-level. b) LINQ supports ad hoc join. c) Another benefit of LINQ is that you can query across relationships without having to join. d) None of the mentioned. View Answer. 6. I often find complex Linq queries that span over 10-15 lines in our code base. I find such queries hard to understand and.

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Creating LINQ Queries. Now that you have your data set up, you can use LINQ to retrieve data. You first need to establish a "connection" to your entities. ... The following code is an example of the distinct keyword: Users user = (from u in data.Users join r in data.Roles on u.userid equals r.userid where u.fname == 'Jane' select u.

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