How do I JOIN in Entity Framework?

How do I JOIN in Entity Framework?

How do I JOIN in Entity Framework?

Method Syntax Next, use the join extension method and specify the inner table as the first argument to the join method. . Join(db. EmailAddresses, The next two arguments specify the condition on which you want to join the tables.

How do I run plain SQL in Entity Framework 6?

The following methods can be used to execute raw SQL queries to the database using Entity Framework 6….Execute Raw SQL Queries in Entity Framework 6

  1. DbSet. SqlQuery()
  2. DbContext. Database. SqlQuery()
  3. DbContext. Database. ExecuteSqlCommand()

How write inner join in Linq?

In LINQ, an inner join is used to serve a result which contains only those elements from the first data source that appears only one time in the second data source. And if an element of the first data source does not have matching elements, then it will not appear in the result data set.

Why LEFT join is used?

A left join is used when a user wants to extract the left table’s data only. Left join not only combines the left table’s rows but also the rows that match alongside the right table.

How can we get data from two tables in MVC?

Display Multiple Tables Data in Single View From DataBase in ASP.NET MVC Using Dapper

  1. Background.
  2. Scenario.
  3. Step 1: Create an MVC Application.
  4. Step 2 : Add The Reference of Dapper ORM into Project.
  5. Step 3: Create Model Class.
  6. Now let us create the model class file named CustomerModel.
  7. Note:

How to setup custom join table in Entity Framework?

One-to-One

  • One-to-Many
  • Many-to-Many

    • Which framework is better than Entity Framework?

    With EF you can focus more on a domain first approach since the data layer is completely abstracted for you.

  • Transactions and rollbacks are managed for you.
  • It’s faster to develop with since you can get it up and running in seconds.
  • It gives you source control of any schema changes with the possibility to do rollbacks through a command.

    • What are some alternatives to Entity Framework?

    No indexes or bad indexes. Spend time desiging a good indexing strategy.

  • A bad schema . For example,please don’t use a nvarxhar max as a primary key in sql server.
  • Use foreign keys. Index the foreign keys.
  • Don’t put an index on every column in your tables.
  • Sprocs are your friends. Use them.
  • Optimize your queries. Don’t run a query that never returns data,yes,I have seen this.

    • How to create an Entity Framework project?

    Create an MVC web app. Open Visual Studio and create a C#web project using the ASP.NET Web Application (.NET Framework) template.

  • Set up the site style.
  • Install Entity Framework 6.
  • Create the data model.
  • Initialize DB with test data.
  • Set up EF 6 to use LocalDB.
  • Create controller and views.
  • View the database.
  • Conventions.
  • Get the code