MS SQL Server provides functionality to quickly insert large amounts of data. It is called Bulk Copy and is performed by SqlBulkCopy class. I already compared how fast is it compared to EF Core 5 in this post: https://www.michalbialecki.com/2020/05/03/entity-framework-core-5-vs-sqlbulkcopy-2/, but this time I want to check something different – linq2db library. What is Linq2db Let’s… Continue reading Bulk copy with Entity Framework Core 5
Entity Framework Core – is it fast?
Entity Framework Core is a great ORM, that recently reached version 5. Is it fast? Is it faster than it’s predecessor, Entity Framework 6, which still offers slightly more functionality? Let’s check that out. This comparison was made by Chad Golden, comparing the performance of adding, updating, and deleting 1000 entities. The exact data and… Continue reading Entity Framework Core – is it fast?
Useful SQL statements when writing EF Core 5 migrations
Entity Framework Core 5 is a great ORM and I love how efficient and concise it is. With the migrations mechanism enabled, you can generate the next migration based on changes applied to your model. This is so cool, but when it comes to other database objects, you are on your own. I mean –… Continue reading Useful SQL statements when writing EF Core 5 migrations
Unit tests in Entity Framework Core 5
Tests are an integral part of software development. These are separate programs that allow you to check if a piece of the program written by us does exactly what it should. Unit tests are small pieces of code that test individual program elements and in Entity Framework Core 5 it’s surprisingly easy to write them.… Continue reading Unit tests in Entity Framework Core 5
How to configure relationships in Entity Framework Core 5
Relationships in a database context define how two entities relate to each other. Entity Framework Core really shines in supporting relationships. It offers a convention-based configuration, that will configure relationships based on the model provided. For more advanced cases we can use robust Fluent API capabilities, that offer greater flexibility. I must admit that working… Continue reading How to configure relationships in Entity Framework Core 5
Read request headers as an object in ASP.Net Core
Reading headers is a standard operation in ASP.NET Core and has been around for ages. I even wrote a post summarizing all methods of passing parameters: ASP.NET Core in .NET 5 – pass parameters to actions. ASP.NET Core introduced handy attributes to handle parameters in controller methods, like [FromQuery] or [FromHeader]. But is there a way… Continue reading Read request headers as an object in ASP.Net Core
How not to pass parameters in Entity Framework Core 5
Recently I wrote a post about executing raw SQL scripts in Entity Framework Core 5: Executing raw SQL with Entity Framework Core 5. One of the readers noticed that I did a big mistake when passing parameters. Let’s take a closed look. I had code like this:
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[HttpPost("UpdateProfiles")] public async Task<IActionResult> UpdateProfiles([FromBody] int minimalProfileId = 0) { await primeDbContext.Database.ExecuteSqlRawAsync( $"UPDATE Profiles SET Country = 'Poland' WHERE LEFT(TelNo, 2) = '48' AND Id > {minimalProfileId}"); return Ok(); } |
This method updates profiles Country to Poland, where… Continue reading How not to pass parameters in Entity Framework Core 5
Executing raw SQL with Entity Framework Core 5
Entity Framework Core 5 is an open-source, lightweight, extensible, and a cross-platform ORM. It is easy to apply and it makes database access super simple. However, sometimes working with tables and views is just not enough. How to execute raw SQL script with Entity Framework Core 5? Let’s find out. Running the raw SQL Running… Continue reading Executing raw SQL with Entity Framework Core 5
Working with views in Entity Framework Core 5
In SQL, a view is a virtual table based on the result-set of an SQL statement. They are typically used as read-only objects that are optimized to provide data for a given scenario. Entity Framework Core 5 can handle views and in this article, I’m going to show you how. Adding a view First of… Continue reading Working with views in Entity Framework Core 5
Select data with a stored procedure with Entity Framework Core 5
Stored procedures are an integral part of any MS SQL database. They are perfect to wrap complicated SQL into a database object, that we can reuse. How to execute a stored procedure that returns data in Entity Framework Core 5? In my last post: Execute a stored procedure with Entity Framework Core 5 I showed how… Continue reading Select data with a stored procedure with Entity Framework Core 5