How do I use joins in Entity Framework?

How do I use joins in Entity Framework?

Method Syntax First join the first two tables. Employees is the outer table and People is the inner table. Project the properties you want to in the output. Also include those properties, which you want to use in the join condition further down the query.

How do I join a table in Entity Framework Core?

In SQL, a JOIN clause is used to combine rows from two or more tables, based on a related column between them. In Entity Framework Core you can use the Join() and GroupJoin() method to achieve the same results. The following query joins Customers and Invoices table using the Join() method.

How do I join multiple tables in Entity Framework?

So, let’s start.

1. Open SQL server and create a database and 3 tables.
2. Open Visual Studio 2015, click on “New Project”, and create an empty web application project.
3. Add Entity Framework now.
4. Right-click the Controllers folder, select Add, then choose Controller, as shown in below screenshot.
5. Create a ViewModel Class.

What is a join entity?

query. In SQL, a JOIN clause is used to combine data from two or more tables, based on a related column between them. Similarly, in Entity Framework, the LINQ Join is used to load data from two or more tables.

What is left join SQL?

The LEFT JOIN command returns all rows from the left table, and the matching rows from the right table. The result is NULL from the right side, if there is no match.

How we implement join operation in Linq to Ef?

Inner Join in LINQ

1. using (JoinEntities Context = new JoinEntities())
2. {
3. var innerJoin = from e in Context.EmployeeMasters.
4. join d in Context.DepartmentMasters on e.DepartmentId equals d.DepartmentId.
5. select new.
6. {
7. EmployeeCode = e.Code,
8. EmployeeName = e.Name,

What is the difference between join and GroupJoin in Linq?

In short, a GroupJoin will do a link between 2 entities even if the right side of the link has nothing to link to. In contrast, the Join will link 2 entities only if both entities contain a link between them. To demonstrate the GroupJoin and the Join, a small example with Northwind Database will be used.