A Fine Slice Of SQL Server
Dian M. Fay has an update to pdot:
A couple years ago, I wrote about exploring a running database by plotting relevant subsets of the foreign key relationship graph in dot and piping the resulting images directly to the terminal. Things have progressed since then:
Read on to see what’s changed, including support for displaying trigger relationships.
Comments closedThere are some instances when you want to analyze data over time, not just dates. Most of us are familiar with having to create date tables and use them in analysis, but having to analyze data over time is not as common. Let’s say you run a taxi company and you want to determine when your busiest times of day are. This would come in handy for scheduling drivers. You need more drivers during busy times because no one wants to wait for a taxi!
Read on to see one way to create the table in Power BI.
Comments closedTeo Lachev shares some thoughts:
I’ve done a few BI integration projects extracting data from ERPs running on IBM Db2. Most of the implementations would use a hybrid architecture where the ERP would be running on an on-prem mainframe while the data was loaded in Microsoft Azure. Here are a few tips if you’re facing this challenge:
Click through for five major points. Surprisingly, one of them isn’t “Avoid DB/2 like the plague.”
Comments closedMohan Saraswatipura explains how database concurrency works in Postgres:
Concurrency control is an essential aspect of database systems that deals with multiple concurrent transactions. PostgreSQL employs various techniques to ensure concurrent access to the database while maintaining data consistency using atomicity and isolation of ACID (stands for Atomicity, Consistency, Isolation and Durability – https://en.wikipedia.org/wiki/ACID) properties.
The majority of the article focuses on Multi-Version Concurrency Control, which is also the concurrency option which would be least well-known to SQL Server users.
Comments closedChris Webb talks about the present and the future:
Turning the question around, however, leads you to some aspects of the question that haven’t been fully explored. Instead of asking “Can I run Power BI Desktop on my Mac?”, you can instead ask “Can I do all of my Power BI development using only a browser?”. At Microsoft our long-term goal is to make all Power BI development web-based, but how close are we to that goal?
Read on for Chris’s answer.
Comments closedAmit Khandelwal has an update on SQL Server on Linux:
We are glad to announce that SQL Server 2022 is now available in preview mode for both Red Hat Enterprise Linux (RHEL) 9 and Ubuntu 22.04. For this preview, only Evaluation edition is available, which is limited to 180 days starting Thursday, July 27th, 2023.
In your Dev/Test environments, you may now take advantage of the most recent SQL Server 2022 improvements on both RHEL 9 and Ubuntu 22.04. Currently, production workloads on RHEL 9 and Ubuntu 22.04 are not supported by the SQL Server 2022 preview packages. You can run the production workloads for SQL Server 2022 on RHEL 8 and Ubuntu 22.04 and they are fully supported.
I’m going to wait until it’s actually available for real, not just in preview.
Comments closedLast year I benchmarked a few ways of shuffling columns in a data.table, but what about pandas? I didn’t know, so let’s revisit those tests and add a few more operations! pandas winds up being much more competitive than I expected.
Click through for those findings and the code Tom used for the task. H/T R-Bloggers.
Comments closedErik Svensen gets things organized:
This might be the default way of doing it but if you always want the chart to be sorted by a particular measure even though you are showing another measure then you can use this workaround. You should of course inform the user about the chosen sort order for instance in the subtitle or similar.
Click through to see what Erik has in mind.
Comments closedErik Darling sets MAXDOP to 1:
It’s August, and that means one thing: Family Vacation. I’m taking this month off from regular blogging, and posting some of my paid beginner training content for you to enjoy, while I enjoy not blogging.
Click through for a good video and no text I can use as a helpful graf.
Comments closedReza Rad does more than copies:
Copy Activity is one of the most commonly used activities in Microsoft Fabric’s Data Factory Pipeline. The Copy Activity copies the data from a source to a destination. However, there is more to that rather than just a simple copy. In this article, you will learn what Copy Activity is, its rationale, how it works, and its configuration options.
Reza has a video, as well as a demo-heavy full-length article on the topic.
Comments closed