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Mastering Entity Framework Core 2.0

You're reading from   Mastering Entity Framework Core 2.0 Dive into entities, relationships, querying, performance optimization, and more, to learn efficient data-driven development

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Product type Paperback
Published in Dec 2017
Publisher Packt
ISBN-13 9781788294133
Length 386 pages
Edition 1st Edition
Languages
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Author (1):
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Prabhakaran Anbazhagan Prabhakaran Anbazhagan
Author Profile Icon Prabhakaran Anbazhagan
Prabhakaran Anbazhagan
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Toc

Table of Contents (13) Chapters Close

Preface 1. Kickstart - Introduction to Entity Framework Core 2. The Other Way Around – Database First Approach FREE CHAPTER 3. Relationships – Terminology and Conventions 4. Building Relationships – Understanding Mapping 5. Know the Validation – Explore Inbuilt Validations 6. Save Yourself – Hack Proof Your Entities 7. Going Raw – Leveraging SQL Queries in LINQ 8. Query Is All We Need – Query Object Pattern 9. Fail Safe Mechanism – Transactions 10. Make It Real – Handling Concurrencies 11. Performance – It's All About Execution Time 12. Isolation – Building a Multi-Tenant Database

Missing indexes

We will modify the About View component with FirstName and LastName filter, using which we should have an index in the data store. If we analyse the data store, we don't have such an index in the following screenshot; it would be wise to create one for better performance:

Let's start working on improvising SQL query performance, and the starting point would be tracing the query using a SQL profiler. So, copy the translated SQL query of translated About View component LINQ query from the right-click the SQL Server Profiler, paste it in the SQL Query Analyzer window, and select Trace Query in SQL Server Profiler, highlighted as shown in the following screenshot:

Once the profiler is attached, execute the query in the Query Analyzer Window, which should be displaying the following results, enable and see the actual execution plan...

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