Below is an example of a migration that simply adds rows to the Resorts table. Enhancements include combining, splitting, and executing SQL in previously tricky ways. EF Core also brings more extensibility options to developers to address data access concerns like query filtering, table splitting, and inheritance. The added benefits of better debugging in EF Core make the library easier to recommend to developers. EF Core is less of a black box than previous versions, helping developers diagnose issues faster.
We can use the Command Object to execute any type of SQL Queries and Stored Procedures to fetch data from the database. ADO.NET was invented by Microsoft as a part of the .NET Framework Component. With the help of this technology, we can access any type of data source through our applications and fetch the data to our C# and VB.NET.
Entity Framework C#
It’s worth experimenting with AsSplitQuery, as it can speed up queries and reduce network traffic by removing data duplication. Additional queries may also be executed depending on the results of the first query. We can write queries as we usually would with our query filter applied to any Production query. If not explicitly told to use the same column, EF Core will create a duplicate column for NumberOfDoors.
As per the above figure, Entity Framework fits between the business entities (domain classes) and the database. In this section, you will add a new property to the EMPLOYEE entity. To reflect the new property what is entity framework in the Oracle database schema as a column, Visual Studio will generate Oracle DDL scripts
from the new EDM. These scripts can then be run against the Oracle database to
update the relational model.
What Is an HTML Entity? The Best Introduction
The stored
procedure will modify the database data and return the results with an implicit resultset. To
return the resultset, you will provide the resultset parameter information in a .NET config file. You will then insert and delete data to the database without using a stored procedure. We applied a simple, yet clever and powerful, solution to return a non-database entity from a stored procedure. This approach entails relatively few lines of supporting code and yields a considerable payoff when using EF Core to retrieve complex results. In this tutorial, we have created a simple code first example application to demonstrate the CRUD operation on users entity.
We’re ready to call the SP and retrieve our example employee data. We now need to add code that identifies our model’s primary key, if one is present. Finally, we invoked the SaveChanges method of the DbContext object to save the changes to the database.
As per the above figure, Entity Framework fits between the business entities (Domain Classes) and the database. It saves the data in the business properties entities and also retrieves the data from the database and converts it into the business entity’s object automatically. These source-specific providers abstract the ADO.NET interfaces used to connect to the database while programming against the conceptual schema. It uses a command tree to translate standard SQL languages like LINQ into native SQL expressions, which it then executes on the given DBMS system.
- In many cases, you need to query multiple records from the database that meet some criterion.
- Consequently, professional developers prefer to work with data in a strongly-typed manner.
- EF Core allows developers to work with organizational units to adapt to different naming styles.
- You can also specify the Key property and the data types for the properties for your entities using the designer.