Book Image

Mastering Entity Framework Core 2.0

By : Prabhakaran Anbazhagan
Book Image

Mastering Entity Framework Core 2.0

By: Prabhakaran Anbazhagan

Overview of this book

Being able to create and maintain data-oriented applications has become crucial in modern programming. This is why Microsoft came up with Entity Framework so architects can optimize storage requirements while also writing efficient and maintainable application code. This book is a comprehensive guide that will show how to utilize the power of the Entity Framework to build efficient .NET Core applications. It not only teaches all the fundamentals of Entity Framework Core but also demonstrates how to use it practically so you can implement it in your software development. The book is divided into three modules. The first module focuses on building entities and relationships. Here you will also learn about different mapping techniques, which will help you choose the one best suited to your application design. Once you have understood the fundamentals of the Entity Framework, you will move on to learn about validation and querying in the second module. It will also teach you how to execute raw SQL queries and extend the Entity Framework to leverage Query Objects using the Query Object Pattern. The final module of the book focuses on performance optimization and managing the security of your application. You will learn to implement failsafe mechanisms using concurrency tokens. The book also explores row-level security and multitenant databases in detail. By the end of the book, you will be proficient in implementing Entity Framework on your .NET Core applications.
Table of Contents (20 chapters)
Title Page
Credits
About the Author
About the Reviewers
www.PacktPub.com
Customer Feedback
Dedication
Preface
4
Building Relationships – Understanding Mapping

Basic raw SQL queries


The main idea of abstracting SQL queries from the framework is to perform implementation irrespective of the data source that we will be using in the application. We might think that creating raw SQL queries must be defeating the very purpose of EF Core's existence. There are a few valid requirements that might need raw SQL instead of leaving Entity to do the work for us.

It could be anything, something that could not be achieved through LINQ queries or performance that was not optimized by Entity-generated queries. The reason could be anything, but, at the end of the day, we all work for an outcome, an optimized outcome with better performance. We might be ready to take extreme measures in not aligning with the framework/APIs, provided the reason is substantiated more than the API usage.

We could perform basic SQL queries or execute stored procedures or functions from EF in raw mode. The framework has a provision in the DBSet through the FromSql method that does the...