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Day: February 22, 2024

Adding Superscripts and Subscripts to Axis Labels in R

Published 2024-02-22 by Kevin Feasel

Steven Sanderson changes the script:

Before we dive into the code, let’s quickly review what superscripts and subscripts are.

  • Superscripts: These are smaller-sized characters or numbers that appear above the baseline of the text. They are often used to denote exponents or indices.
  • Subscripts: On the other hand, subscripts are smaller-sized characters or numbers that appear below the baseline of the text. They are commonly used in mathematical expressions or chemical formulas.

Read on to see how you can generate these in R visuals.

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GUID Conversion and the Serverless SQL Pool

Published 2024-02-22 by Kevin Feasel

Reitse Eskens hits a weird error:

One of the transformations is to change one primary key column from integer to GUID. This is something you can do with some trickery you’ll see in the code. But what I found was that, even though the primary key is unique, the GUID’s weren’t. And then the fun starts digging into the why…

Read on for the research Reitse performed. I don’t even have a good guess for this, it’s so weird. It feels like a bug but it’s weird regardless.

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Full and Incremental Loads in Microsoft Fabric

Published 2024-02-22 by Kevin Feasel

John Miner continues a series on data engineering in Microsoft Fabric:

In a data lake, we have a bronze quality zone that supposed to represent the raw data in a delta file format. This might include versions of the files for auditing. In the silver quality zone, we have a single version of truth. The data is de-duplicated and cleaned up. How can we achieve these goals using the Apache Spark engine in Microsoft Fabric?

Read on for John’s take on the answer. I’ve found that I have a fairly good answer for smaller datasets, though as the size of the data gets larger, the less I like answers for the raw layer.

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Community Updates to Community Stored Procedures

Published 2024-02-22 by Kevin Feasel

Erik Darling shares some updates:

If you’re the kind of person who needs quick and easy ways to troubleshoot SQL Server performance problems, and you haven’t tried my free scripts yet, you’re probably going to keep having SQL Server performance problems.

I don’t get a lot of visitor contributions to my code (and here I thought it was just because it’s perfect), but I had a couple cool recent additions to sp_QuickieStore, my free tool for searching and analyzing Query Store data.

Read on to see what’s new in a few procedures. Also, Die verboten Toten would absolutely be the name of my German punk rock or possibly DC hardcore style band.

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The Risk of Query Failure on Readable Secondaries in SQL Server

Published 2024-02-22 by Kevin Feasel

Kendra Little explains a problem:

If you use readable secondaries in Availability Groups or Read-Scale out instances in Azure SQL Managed Instance, you may have queries fail repeatedly if there is a glitch and statistics are not successfully “refreshed” on the secondary replica. Those queries may keep failing until you manually intervene.

This has been the case for a few years, and it’s unclear if Microsoft will fix this. There is a well established support deflection article which documents the issue and provides ‘workarounds’.

Read on for Kendra’s thoughts. I haven’t run into this before, myself, but I also don’t tend to make very heavy use of readable secondaries.

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