USE [WideWorldImporters];
GO

SET STATISTICS IO ON;
GO

SELECT
    [p].[PurchaseOrderID],
    [pl].[PurchaseOrderLineID]
FROM [Purchasing].[PurchaseOrders] [p]
    JOIN [Purchasing].[PurchaseOrderLines] [pl]
    ON [p].[PurchaseOrderID] = [pl].[PurchaseOrderID];
GO

ALTER TABLE [Purchasing].[PurchaseOrders] ADD  CONSTRAINT [PK_Purchasing_PurchaseOrders] PRIMARY KEY CLUSTERED
(
   [PurchaseOrderID] ASC
)

CREATE NONCLUSTERED INDEX [FK_Purchasing_PurchaseOrderLines_PurchaseOrderID] ON [Purchasing].[PurchaseOrderLines]
(
    [PurchaseOrderID] ASC
)

SELECT
    [o].[OrderID],
    [ol].[OrderLineID]
FROM [Sales].[Orders] [o]
    JOIN [Sales].[OrderLines] [ol]
    ON [o].[OrderID] = [ol].[OrderID];
GO

SELECT
    [ol].[OrderID],
    [ol].[OrderLineID]
FROM [Sales].[Orders] [o]
    JOIN [Sales].[OrderLines] [ol]
    ON [o].[OrderID] = [ol].[OrderID];

SELECT *
FROM [Sales].[Orders] [o]
    JOIN [Sales].[OrderLines] [ol]
    ON [o].[OrderID] = [ol].[OrderID];
GO

SELECT TOP 1000
    *
FROM [Sales].[OrderLines];
GO

SELECT TOP 1000
    *
FROM [Sales].[OrderLines]
ORDER BY [Description];
GO

SELECT
    [CustomerID],
    [OrderDate],
    [ExpectedDeliveryDate]
FROM [Sales].[Orders]
ORDER BY [CustomerID];
GO

CREATE NONCLUSTERED INDEX [IX_Sales_Orders_CustomerID_Dates]
ON [Sales].[Orders](
[CustomerID] ASC
)
INCLUDE (
[OrderDate], [ExpectedDeliveryDate]
)
ON [USERDATA];
GO

using Microsoft.AspNetCore.Http;

public class Startup
{
    public void Configure(IApplicationBuilder app)
    {
        app.Use(async (context, next) =>
        {
            await context.Response.WriteAsync("<div>from middleware-1, inside app.Use, before next()</div>");
 
            await next();
 
            await context.Response.WriteAsync("<div>from middleware-1, inside app.Use, after next()</div>");
        });
 
        app.Run(async context =>
        {
            await context.Response.WriteAsync("<div>Inside middleware-2 defined using app.Run</div>");
        });
 
        app.Use(async (context, next) =>
        {
            await context.Response.WriteAsync("<div>from middleware-3, inside app.Use, before next()</div>");
 
            await next();
 
            await context.Response.WriteAsync("<div>from middleware-3, inside app.Use, after next()</div>");
        });

 public delegate Task RequestDelegate(HttpContext context);

app.Map("/dnt", appBuilder =>
{
    appBuilder.Run(async context =>
    {
        await context.Response.WriteAsync(@"<div>Inside Map(/dnt) --> Run</div>");
    });
});

app.MapWhen(context =>
{
    return context.Request.Query.ContainsKey("dnt");
},
appBuilder =>
{
    appBuilder.Run(async context =>
    {
        await context.Response.WriteAsync(@"<div>Inside MapWhen(?dnt) --> Run</div>");
    });
});

 http://localhost:7742/?dnt=true

using System.Threading.Tasks;
using Microsoft.AspNetCore.Http;
 
namespace Core1RtmEmptyTest.StartupCustomizations
{
    public class MyMiddleware1
    {
        private readonly RequestDelegate _next;
 
        public MyMiddleware1(RequestDelegate next)
        {
            _next = next;
        }
 
        public async Task Invoke(HttpContext context)
        {
                    context.Response.ContentType = "text/html";
                    context.Response.StatusCode = 200;
            await context.Response.WriteAsync("<div>Hello from MyMiddleware1.</div>");
            await _next.Invoke(context);
            await context.Response.WriteAsync("<div>End of action.</div>");
        }
    } 
}

using Microsoft.AspNetCore.Builder;

public static class MyMiddlewareExtensions
{
    public static IApplicationBuilder UseMyMiddleware(this IApplicationBuilder app)
    {
        app.UseMiddleware<MyMiddleware1>();
        return app;
    }
}

public void Configure(IApplicationBuilder app)
{
    app.UseMyMiddleware();

JS Is Weird
JavaScript is a great programming language, but thanks to the fact that its initial release was built in only ten days back in 1995, coupled with the fact that JS is backward-compatible, it's also a bit weird. It doesn't always behave the way you might think. In this quiz, you'll be shown 25 quirky expressions and will have to guess the output. Even if you're a JS developer, most of this syntax is probably, and hopefully, not something you use in your daily life. 

What's New in Blazor for .NET 8
Come find out about the future of Blazor in .NET 8! We'll explore all the upcoming features and improvements, including our effort to create a unified full stack web UI programming model that combines the strengths of client and server. We hope to see you there!

You will learn:
How Blazor is becoming the best option for full stack web development
How Blazor in .NET 8 will provide full flexibility to build web apps however works best for you
How to try out the latest Blazor features in .NET 8
 

Rust has been ranked as one of the most loved languages by developers. In this series, you will learn the fundamentals of Rust development. We'll start by downloading the tools you need to program with Rust, walk through common concepts, and share what's unique about Rust. By the end of this series, you will have enough knowledge to go forth and write your own Rust programs. It's highly recommended that you watch this series if you have prior experience with programming in another language.