Technical Article

Fun with PowerShell Asynchronous

Imagine a candle that is lit and takes 1 hour to burn out. Now imagine one hundred candles. How many hours will it last? That depends. If they are lit simultaneously, it will take 1 hour. That is the basic idea of running in the background or asynchronously. Of course, the 100 candles can execute independently of one another, unlike if you try to run 100 processes on a computer with 2 cores. PowerShell has some ways to manage that, as PowerShell job – which we will see in this article – runspaces – needs to add programmable using .net.

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Question of the Day

Using OPENJSON

I have some data in a table that looks like this:

BeerID BeerName    brewer               beerdescription
1      Becks       Interbrew            Beck's is a German-style pilsner beer 
2      Fat Tire    New Belgium          Toasty malt, gentle sweetness, flash of fresh hop bitterness.
3      Mac n Jacks Mac & Jack's Brewery This beer erupts with a floral, hoppy taste
4      Alaskan Amber Alaskan Brewing     Alaskan Brewing Amber Ale is an "alt" style beer
8      Kirin       Kirin Brewing         Kirin Ichiban is a Lager-type beer
If I run this, what is returned?
select t1.key
    from openjson((select t.* FROM Beer AS t for json path)) t1

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