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 to run a stored procedure, but selecting the data it’s a different kind of story. Let’s have a look.

Adding a stored procedure

First of all, we need to add a stored procedure. The best way to do so is to add a database migration with an appropriate SQL. Let’s start by adding a migration with EF Core global tool command:

dotnet ef migrations add spGetGuestsForDate 

This will generate a migration, that we can put our SQL into. Let’s see how it may look:

public partial class spGetGuestsForDate : Migration
{
    protected override void Up(MigrationBuilder migrationBuilder)
    {
        var sql = @"
            IF OBJECT_ID('GetGuestsForDate', 'P') IS NOT NULL
            DROP PROC GetGuestsForDate
            GO
 
            CREATE PROCEDURE [dbo].[GetGuestsForDate]
                @StartDate varchar(20)
            AS
            BEGIN
                SET NOCOUNT ON;
                SELECT p.Forename, p.Surname, p.TelNo, r.[From], r.[To], ro.Number As RoomNumber
                FROM Profiles p
                JOIN Reservations r ON p.ReservationId = p.ReservationId
                JOIN Rooms ro ON r.RoomId = ro.Id
                WHERE CAST([From] AS date) = CONVERT(date, @StartDate, 105)
            END";
 
        migrationBuilder.Sql(sql);
    }
 
    protected override void Down(MigrationBuilder migrationBuilder)
    {
        migrationBuilder.Sql(@"DROP PROC GetGuestsForDate");
    }
}

This is a simple SQL code, that first checks if a procedure exists and if so, it deletes it. Then it creates a new procedure with the name GetGuestsForDate, which will get all arriving guests for a given date.

When the migration will be executed on the database, this stored procedure will be present, which we can see here:

#asp.net core for .net 5 & ef core 5 #ef core 5 #stored procedure #data science

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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 to run a stored procedure, but selecting the data it’s a different kind of story. Let’s have a look.

Adding a stored procedure

First of all, we need to add a stored procedure. The best way to do so is to add a database migration with an appropriate SQL. Let’s start by adding a migration with EF Core global tool command:

dotnet ef migrations add spGetGuestsForDate 

This will generate a migration, that we can put our SQL into. Let’s see how it may look:

public partial class spGetGuestsForDate : Migration
{
    protected override void Up(MigrationBuilder migrationBuilder)
    {
        var sql = @"
            IF OBJECT_ID('GetGuestsForDate', 'P') IS NOT NULL
            DROP PROC GetGuestsForDate
            GO
 
            CREATE PROCEDURE [dbo].[GetGuestsForDate]
                @StartDate varchar(20)
            AS
            BEGIN
                SET NOCOUNT ON;
                SELECT p.Forename, p.Surname, p.TelNo, r.[From], r.[To], ro.Number As RoomNumber
                FROM Profiles p
                JOIN Reservations r ON p.ReservationId = p.ReservationId
                JOIN Rooms ro ON r.RoomId = ro.Id
                WHERE CAST([From] AS date) = CONVERT(date, @StartDate, 105)
            END";
 
        migrationBuilder.Sql(sql);
    }
 
    protected override void Down(MigrationBuilder migrationBuilder)
    {
        migrationBuilder.Sql(@"DROP PROC GetGuestsForDate");
    }
}

This is a simple SQL code, that first checks if a procedure exists and if so, it deletes it. Then it creates a new procedure with the name GetGuestsForDate, which will get all arriving guests for a given date.

When the migration will be executed on the database, this stored procedure will be present, which we can see here:

#asp.net core for .net 5 & ef core 5 #ef core 5 #stored procedure #data science

Your Data Architecture: Simple Best Practices for Your Data Strategy

If you accumulate data on which you base your decision-making as an organization, you should probably think about your data architecture and possible best practices.

If you accumulate data on which you base your decision-making as an organization, you most probably need to think about your data architecture and consider possible best practices. Gaining a competitive edge, remaining customer-centric to the greatest extent possible, and streamlining processes to get on-the-button outcomes can all be traced back to an organization’s capacity to build a future-ready data architecture.

In what follows, we offer a short overview of the overarching capabilities of data architecture. These include user-centricity, elasticity, robustness, and the capacity to ensure the seamless flow of data at all times. Added to these are automation enablement, plus security and data governance considerations. These points from our checklist for what we perceive to be an anticipatory analytics ecosystem.

#big data #data science #big data analytics #data analysis #data architecture #data transformation #data platform #data strategy #cloud data platform #data acquisition

Announcing Entity Framework Core (EF Core) 5 RC2

Today, the Entity Framework Core team announces the second release candidate (RC2) of EF Core 5.0. This is a feature complete release candidate of EF Core 5.0 and ships with a “go live” license. You are supported using it in production. This is a great opportunity to start using EF Core 5.0 early while there is still time to fix remaining issues. We’re looking for reports of any remaining critical bugs that should be fixed before the final release.

Prerequisites

EF Core 5.0 will not run on .NET Standard 2.0 platforms, including .NET Framework.

• The release candidates of EF Core 5.0 require .NET Standard 2.1.
• This means that EF Core 5.0 will run on .NET Core 3.1 and does not require .NET 5.
• To summarize: EF Core 5.0 runs on platforms that support .NET Standard 2.1.

How to get EF Core 5.0 Release Candidate 2

EF Core is distributed exclusively as a set of NuGet packages. For example, to add the SQL Server provider to your project, you can use the following command using the dotnet tool:

dotnet add package Microsoft.EntityFrameworkCore.SqlServer --version 5.0.0-rc.2.20475.6

#.net #.net core #.net framework #asp.net #c# #entity framework #announcement #asp.net core #entity framework core

Execute 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 in Entity Framework Core 5? Let’s have a look.

Adding a stored procedure

First of all we need to add a stored procedure. The best way to do so is to add a database migration with an appropriate SQL. Let’s start by adding a migration with EF Core global tool command:

dotnet ef migrations add spUpdateProfilesCountry

This will generate a migration, that we can put our SQL into. Let’s see how it may look:

{
    protected override void Up(MigrationBuilder migrationBuilder)
    {
        var sql = @"
            IF OBJECT_ID('UpdateProfilesCountry', 'P') IS NOT NULL
            DROP PROC UpdateProfilesCountry
            GO

            CREATE PROCEDURE [dbo].[UpdateProfilesCountry]
                @StardId int
            AS
            BEGIN
                SET NOCOUNT ON;
                UPDATE Profiles SET Country = 'Poland' WHERE LEFT(TelNo, 2) = '48' AND Id > @StardId
            END";

        migrationBuilder.Sql(sql);
    }

    protected override void Down(MigrationBuilder migrationBuilder)
    {
        migrationBuilder.Sql(@"DROP PROC UpdateProfilesCountry");
    }
}

This is a simple SQL code, that first checks if procedure exists and if so, it deletes it. Then it creates a new procedure with UpdateProfilesCountry name, which will update Country column for every Profile that phone number starts from 48.

When this migration will be run on the database, it will create UpdateProfilesCountry stored procedure as in my case.

#asp.net core for .net 5 & ef core 5 #ef core 5 #stored procedure

Execute 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 in Entity Framework Core 5? Let’s have a look.

Adding a stored procedure

First of all we need to add a stored procedure. The best way to do so is to add a database migration with an appropriate SQL. Let’s start by adding a migration with EF Core global tool command:

1

dotnet ef migrations add spUpdateProfilesCountry

This will generate a migration, that we can put our SQL into. Let’s see how it may look:

public partial class spUpdateProfilesCountry : Migration

{

protected override void Up ( MigrationBuilder migrationBuilder )

{

var sql = @"

IF OBJECT_ID(‘UpdateProfilesCountry’, ‘P’) IS NOT NULL

DROP PROC UpdateProfilesCountry

GO

CREATE PROCEDURE [dbo].[UpdateProfilesCountry]

@StardId int

AS

BEGIN

SET NOCOUNT ON;

UPDATE Profiles SET Country = ‘Poland’ WHERE LEFT(TelNo, 2) = ‘48’ AND Id > @StardId

END" ;

migrationBuilder . Sql ( sql );

}

protected override void Down ( MigrationBuilder migrationBuilder )

{

migrationBuilder . Sql ( @“DROP PROC UpdateProfilesCountry” );

}

}

This is a simple SQL code, that first checks if procedure exists and if so, it deletes it. Then it creates a new procedure with UpdateProfilesCountry name, which will update Country column for every Profile that phone number starts from 48.

When this migration will be run on the database, it will create UpdateProfilesCountry stored procedure as in my case.

Running the stored procedure

There is no dedicated method to run a stored procedure, so in the case where a stored procedure doesn’t return data, we can just invoke it as a raw SQL. This can be achieved like this:

1

2

3

await primeDbContext . Database . ExecuteSqlRawAsync (

“UpdateProfilesCountry @p0” ,

parameters : new [] { minimalProfileId . ToString () });

When I query the database for all numbers starting with 48, I will see that the country has been updated to Poland. This means that our procedure was executed successfully.

BTW. Don’t worry, those are fake data, generated with Bogus 🙂

#asp.net core for .net 5 & ef core 5 #ef core 5 #stored procedure