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Author: Kevin Feasel

Functional Programming and R

Published 2023-10-26 by Kevin Feasel

Anirban Shaw ties functional programming to R:

Functional Programming‘s relevance in the R programming language, a language primarily known for its prowess in data analysis and statistical computing, is particularly noteworthy. By leveraging functional programming, organizations can improve operational efficiency and gain a competitive edge. 

R’s ecosystem is enriched by functional programming paradigms, which enable developers and data scientists to write concise and expressive code for tasks such as data manipulation, transformation, and visualization.

In this article, we take a deep dive into the fundamental characteristics of R, the advantages of adopting functional programming within it and the essential concepts ingrained in the core of R. 

Read on to see how the two fit together. H/T R-Bloggers.

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Understanding Postgres Explain Plans

Published 2023-10-26 by Kevin Feasel

Muhammad Ali explains explain plans:

In a previous post titled Exploring Postgres Performance: A Deep Dive into pg_stat_statements, we discussed the utility of pg_stat_statements as a tool for identifying resource-intensive queries in terms of memory, CPU, or I/O usage.

Now, let’s suppose you’ve pinpointed certain queries you’d like to investigate further. The EXPLAIN command is used to generate execution plans. It includes:

Read on to see what it includes, how you can generate an explain plan, and some of the optional settings.

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Working with Oracle Cloud Infrastructure from Python

Published 2023-10-26 by Kevin Feasel

Brendan Tierney peruses an SDK:

Having set up your Oracle Cloud account and perhaps initiated some services, such as an Autonomous Database or an AI Service, you have some options with how you’ll interact with those services. The first is to use the online interfaces and tools for them. Another is to access these OCI services from your local PC or laptop. This latter method gives you greater flexibility for accessing these services, automating various tasks and building out some applications. This post will step through how to install the necessary Python library, how to configure for connecting to OCI and will demo some of the simpler APIs for accessing the OCI services. This will help you verify your connection is working correctly.

Click through for the details.

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Embrace the Power of 5th Normal Form

Published 2023-10-25 by Kevin Feasel

I have a new video up:

In this video, we drill into the other most important normal form, learning what Fifth Normal Form (5NF) is, why Boyce-Codd Normal Form is not enough, and examples of why 5NF can be such a challenge to implement.

Until I read CJ Date’s Database Design and Relational Theory (2nd edition), my level of appreciation for 5th Normal Form was somewhat limited, but that’s mostly because I didn’t understand it well at all. I liked the connection trap example in this article, but Date’s book was the first really good explanation of 5NF and just how powerful it is. My hope is that I was successfully able to convey that power to audiences.

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Scree Plots in R

Published 2023-10-25 by Kevin Feasel

Steven Sanderson builds a scree plot:

A scree plot is a line plot that shows the eigenvalues or variance explained by each principal component (PC) in a Principal Component Analysis (PCA). It is a useful tool for determining the number of PCs to retain in a PCA model.

In this blog post, we will show you how to create a scree plot in base R. We will use the iris dataset as an example.

Read on to learn more about the plot, as well as examples of how to create scree plots.

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Cross-Environment Schema Comparison for ADF

Published 2023-10-25 by Kevin Feasel

Teo Lachev has a script for us:

So, I got on a quest to find an ADF schema comparison tool for a quick and dirty way to identify ADF code discrepancies between two environments and promote changes manually. Ideally, the tool would be something like SQL Server Database projects in Visual Studio.

Read on to see what Teo was able to find, as well as a few code changes around it.

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Deadlock Analysis with SQL Sentry Plan Explorer

Published 2023-10-25 by Kevin Feasel

Rod Edwards looks at deadlocks:

I’ve also included a REALLY useful bit of functionality in a common free tool that you may not expect. Simply scroll to the to the end for it if you’re up to speed with Deadlocks already, or don’t want to read my inane rambles.

So we know what a deadlock is, multiple queries all contending for resources, one query holds some resources and is waiting on resources that another query has. That second query isn’t giving the resources up and is waiting for resources that the first query has. Both are stubborn, neither are releasing what they have until they completed…so we have a standoff.

Read on to learn a bit more about the mechanics behind deadlocks, as well as how Plan Explorer makes life easier.

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