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Day: July 11, 2022

Working with Objects in Powershell

Jeffrey Hicks explains the value of working with objects in Powershell:

I expect I will write several articles about PowerShell and its relationship with objects. I know that this is the biggest hurdle for PowerShell beginners to overcome. But once they grasp that PowerShell is about working with objects in the pipeline, they recognize the value and begin finding it easier to write PowerShell code and use it interactively at a console prompt.

Read the whole thing and if you like what you see, there’s also a Substack where you can sign up for free or subscribe for additional content.

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Searching Industry Templates for Lake Databases in Synapse

Lakshmi Murthy is just browsing:

With Azure Synapse Database Templates generally available, our customers are constantly wanting to see and learn more about how to use these templates. Through these blogs we want to share tips and tricks our customers can use to help them utilize these templates in an efficient way. We’ve recently received several questions around the different ways a user can navigate these templates to create their lake databases. In this blog, I’d like to walk through a few options that may come handy as you give database templates a try.

Azure Synapse Analytics offers a no-code database designer which allows you to browse these database templates, select and customize the tables you want to use, to model your enterprise data. There are several ways to browse the tables provided by the comprehensive industry templates within the designer’s exploration experience. Though the user experience is super intuitive, there are a few tips and tricks that can make this process even easier. Let’s do a quick tour to learn about the different ways to browse these templates.

Click through for a few different ways to look at standard tables for different industries.

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Uploading Multiple Reports to Power BI

Jon Fletcher doesn’t have time to upload reports one by one with the UI:

In this blog post, I will be sharing a PowerShell script that allows multiple Power BI reports to be uploaded at once. In a previous blogpost, I shared a PowerShell script that allowed users to downloaded multiple Power BI reports. Combined you could move several reports from one workspace to another in a few seconds.

The script is downloadable at the bottom of the page as a txt file. To use the script there are three steps to take.

Click through to see how it all works.

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Filtered Statistics and Table Performance

Guy Glantser provides a use case for filtered statistics:

Let’s say you have a very large table on a SQL Server 2012 Standard Edition instance. This means: old cardinality estimator and no partitioning. The table has a DATETIME column, which is ever-increasing, and it contains 5 years of data (it has to, due to regulations). The auto-update statistics kicks in only every 4 days, more or less, even when trace flag 2371 is enabled. The problem is that users usually query the table for the last day, and only rarely need to access older data. Since auto-update statistics uses a very small sample rate for very large tables, the result is not very accurate. The bottom line of all this is that most of the time you get a poor execution plan, because the optimizer estimates very few rows, while in fact there are many rows. What can you do?

I’m not sure I’ve ever used filtered statistics but it is good to know such a thing exists.

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Parameter Sensitive Plan Optimization with Branches and Local Variables

Erik Darling has some mixed news. First up, if you branch a lot:

I’ve spent a bit of time talking about how IF branches can break query performance really badly in SQL Server.

While the Parameter Sensitive Plan (PSP) optimization won’t fix every problem with this lazy coding habit, it can fix some of them in very specific circumstances, assuming:

– The parameter is eligible for PSP

– The parameter is present across IF branches

Less sanguine news if you use local variables a lot:

One fix I’ve been wishing for, or wish I’ve been fixing for, is a cure for local variables. I’d even be cool if Forced Parameterization was that cure, but you know…

Time will tell.

Though I prefer to call local variables an “Optimize for mediocre” plan hint.

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