Add API project to solution.

dotnet sln add EntityFrameworkCore.API/EntityFrameworkCore.API.csproj

EntityFrameworkCore.API/EntityFrameworkCore.API.csproj

@@ -0,0 +1,13 @@
+<Project Sdk="Microsoft.NET.Sdk.Web">
+
+  <PropertyGroup>
+    <TargetFramework>net9.0</TargetFramework>
+    <Nullable>enable</Nullable>
+    <ImplicitUsings>enable</ImplicitUsings>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="Microsoft.AspNetCore.OpenApi" Version="9.0.3" />
+  </ItemGroup>
+
+</Project>

EntityFrameworkCore.API/EntityFrameworkCore.API.http

@@ -0,0 +1,6 @@
+@EntityFrameworkCore.API_HostAddress = http://localhost:5072
+
+GET {{EntityFrameworkCore.API_HostAddress}}/weatherforecast/
+Accept: application/json
+
+###

EntityFrameworkCore.API/Program.cs

@@ -0,0 +1,41 @@
+var builder = WebApplication.CreateBuilder(args);
+
+// Add services to the container.
+// Learn more about configuring OpenAPI at https://aka.ms/aspnet/openapi
+builder.Services.AddOpenApi();
+
+var app = builder.Build();
+
+// Configure the HTTP request pipeline.
+if (app.Environment.IsDevelopment())
+{
+    app.MapOpenApi();
+}
+
+app.UseHttpsRedirection();
+
+var summaries = new[]
+{
+    "Freezing", "Bracing", "Chilly", "Cool", "Mild", "Warm", "Balmy", "Hot", "Sweltering", "Scorching"
+};
+
+app.MapGet("/weatherforecast", () =>
+{
+    var forecast =  Enumerable.Range(1, 5).Select(index =>
+        new WeatherForecast
+        (
+            DateOnly.FromDateTime(DateTime.Now.AddDays(index)),
+            Random.Shared.Next(-20, 55),
+            summaries[Random.Shared.Next(summaries.Length)]
+        ))
+        .ToArray();
+    return forecast;
+})
+.WithName("GetWeatherForecast");
+
+app.Run();
+
+record WeatherForecast(DateOnly Date, int TemperatureC, string? Summary)
+{
+    public int TemperatureF => 32 + (int)(TemperatureC / 0.5556);
+}

EntityFrameworkCore.API/Properties/launchSettings.json

@@ -0,0 +1,23 @@
+{
+  "$schema": "https://json.schemastore.org/launchsettings.json",
+  "profiles": {
+    "http": {
+      "commandName": "Project",
+      "dotnetRunMessages": true,
+      "launchBrowser": false,
+      "applicationUrl": "http://localhost:5072",
+      "environmentVariables": {
+        "ASPNETCORE_ENVIRONMENT": "Development"
+      }
+    },
+    "https": {
+      "commandName": "Project",
+      "dotnetRunMessages": true,
+      "launchBrowser": false,
+      "applicationUrl": "https://localhost:7223;http://localhost:5072",
+      "environmentVariables": {
+        "ASPNETCORE_ENVIRONMENT": "Development"
+      }
+    }
+  }
+}

EntityFrameworkCore.API/appsettings.Development.json

@@ -0,0 +1,8 @@
+{
+  "Logging": {
+    "LogLevel": {
+      "Default": "Information",
+      "Microsoft.AspNetCore": "Warning"
+    }
+  }
+}

EntityFrameworkCore.API/appsettings.json

@@ -0,0 +1,9 @@
+{
+  "Logging": {
+    "LogLevel": {
+      "Default": "Information",
+      "Microsoft.AspNetCore": "Warning"
+    }
+  },
+  "AllowedHosts": "*"
+}

EntityFrameworkCore.Console/Program.cs

@@ -1,5 +1,6 @@
 using EntityFrameworkCore.Data;
 using EntityFrameworkCore.Domain;
+using Microsoft.Data.Sqlite;
 using Microsoft.EntityFrameworkCore;
 
 using var context = new DeadBallZoneLeagueDbContext();
@@ -15,7 +16,93 @@ context.Database.EnsureCreated();
 // Rather than raise: "System.InvalidOperationException: Sequence contains no elements."
 // var firstCoach = await context.Coaches.FirstOrDefaultAsync();
 
-var details = await context.TeamsAndLeaguesView.ToListAsync();
+
+async Task UserDefinedQuery()
+{
+  var earliestMatch = context.GetEarliestTeamMatch(1);
+  // This is done, if you have a user-defined function in the database.
+  // for example:
+  // CREATE FUNCTION [dbo].[GetEarliestMatch] (@teamId int)
+  //   RETURNS datetime
+  //   BEGIN
+  //     DECLARE @result datetime
+  //     SELECT TOP 1 @result = date
+  //     FROM MATCHES [dbo].[Matches]
+  //     ORDER BY Date
+  //     return @result
+  //   END
+}
+
+async Task QueryScalarType()
+{
+  // Query a scalar or non-entity type.
+  // Scalar subqueries or scalar queries are queries that return exactly one column and one or zero records.
+  // Source: https://stackoverflow.com/questions/20424966/what-is-a-scalar-query
+  var leagueIds = context.Database.SqlQuery<int>(
+    $"SELECT Id FROM Leagues"
+  ).ToList();
+}
+
+async Task RawSQLStatement()
+{
+  // Beware that SQL Injection can be used on input here.
+  Console.WriteLine("Enter Team name: ");
+  var teamName = Console.ReadLine();
+  // If you omit this param creation, SQL injection is possible.
+  var teamNameParam = new SqliteParameter("teamName", teamName);
+  var teams = context.Teams.FromSqlRaw(
+    $"SELECT * FROM Teams WHERE name = @teamName", teamNameParam
+  );
+  foreach (var t in teams)
+  {
+    Console.WriteLine($"SQL Raw Team: {t.Name}");
+  }
+
+  // Parameterization happens automatically for these two:
+  teams = context.Teams.FromSql($"SELECT * FROM Teams WHERE name = {teamName}");
+  foreach (var t in teams)
+  {
+    Console.WriteLine($"SQL Raw Team: {t.Name}");
+  }
+
+  // Note, that you cannot use JOINs in these SQL queries.
+  // Instead, the Include() function is used to add related data.
+
+  // FromSqlInterpolated is the revised form of FromSql, and a better choice.
+  teams = context.Teams.FromSqlInterpolated($"SELECT * FROM Teams WHERE name = {teamName}");
+  foreach (var t in teams)
+  {
+    Console.WriteLine($"SQL Raw Team: {t.Name}");
+  }
+
+  // You can also mix with LINQ.
+  var teamsList = context.Teams.FromSql($"SELECT * FROM Teams")
+    .Where(t => t.Id == 1)
+    .OrderBy(t => t.Id)
+    .Include("League")
+    .ToList();
+  foreach (var t in teamsList)
+  {
+    Console.WriteLine($"SQL Raw Team: {t.Name}");
+  }
+
+  // Stored procedures example. Note that SQLite does not support stored proceduces.
+  var leagueId = 1;
+  var league = context.Leagues.FromSqlInterpolated(
+    $"EXEC dbo.StoredProcedureToGetLeagueName {leagueId}"
+  );
+
+  // Non-querying statement examples.
+  var newTeamName = "Neo Oslo";
+  var success = context.Database.ExecuteSqlInterpolated(
+    $"UPDATE Teams SET Name = {newTeamName}"
+  );
+
+  var teamToDelete = 1;
+  var teamDeletedSuccess = context.Database.ExecuteSqlInterpolated(
+    $"EXEC dbo.DeleteTeam {teamToDelete}"
+  );
+}
 
 async Task ProjectionAndAnonymousDataTypes()
 {

EntityFrameworkCore.Data/DeadBallZoneLeagueDbContext.cs

@@ -41,5 +41,16 @@ public class DeadBallZoneLeagueDbContext : DbContext
 
     // This database object does not have a Primary Key, so we state that here, otherwise an exception is thrown.
     modelBuilder.Entity<TeamsAndLeaguesView>().HasNoKey().ToView("vw_TeamsAndLeagues");
+
+    // This is for user-defined functions.
+    modelBuilder.HasDbFunction(
+      typeof(DeadBallZoneLeagueDbContext)
+      .GetMethod(
+        nameof(GetEarliestTeamMatch),
+        new[] {typeof(int)}
+      ))
+      .HasName("GetEarliestMatch");
   }
+
+  public DateTime GetEarliestTeamMatch(int teamId) => throw new NotImplementedException();
 }

deadballzone.sln

@@ -9,6 +9,8 @@ Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "EntityFrameworkCore.Domain"
 EndProject
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "EntityFrameworkCore.Console", "EntityFrameworkCore.Console\EntityFrameworkCore.Console.csproj", "{58F305A5-1C40-445D-8B2D-2CA4A0224274}"
 EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "EntityFrameworkCore.API", "EntityFrameworkCore.API\EntityFrameworkCore.API.csproj", "{07BDB953-9BB3-431B-9F50-0AC270946B8D}"
+EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU
@@ -30,5 +32,9 @@ Global
 		{58F305A5-1C40-445D-8B2D-2CA4A0224274}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{58F305A5-1C40-445D-8B2D-2CA4A0224274}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{58F305A5-1C40-445D-8B2D-2CA4A0224274}.Release|Any CPU.Build.0 = Release|Any CPU
+		{07BDB953-9BB3-431B-9F50-0AC270946B8D}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{07BDB953-9BB3-431B-9F50-0AC270946B8D}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{07BDB953-9BB3-431B-9F50-0AC270946B8D}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{07BDB953-9BB3-431B-9F50-0AC270946B8D}.Release|Any CPU.Build.0 = Release|Any CPU
 	EndGlobalSection
 EndGlobal