Db2 Experts on a Data Science Quest
Every RDBMS has areas where the differences from other RDBMSes are noticeable, and this is one of them between Db2 and MySQL. Most RDBMSes have quirks to the way SQL is written, and this is certainly true of Db2 where some things were there before the SQL-92 standard or other standards existed.… Read the rest
Continue reading »
One of the things that learning a new platform (MySQL) has taught me is just how critical the most basic topics are, so I thought I’d do an overview of how to get data out of a Db2 (on Linux, Unix, or Windows) database.… Read the rest
Continue reading »
I’ve been spending some time working with indexes as I learn MySQL, and there were a few things I thought were were worth mentioning. As always, I’m writing from my own knowledge with deep experience in IBM DB2, and as a learner when it comes to MySQL.… Read the rest
Continue reading »
I’ve spent some time understanding how MySQL structures tables and indexes, and wanted to share what I’ve learned. This is not the structure as created in the CREATE TABLE or CREATE INDEX statements, but how that data is generally structured on disk, both logically and physically.… Read the rest
Indexes are magic, right? Add one and magically the performance of a query improves.
Well, not really. Each index has a cost, and thoughtful multi-column indexes will go a lot further than individual indexes. Let’s dig into the details.
Relational databases require queries to specify what data they want returned with no specification of where that data is on disk.… Read the rest
Continue reading »
One of the things that learning a new RDBMS is teaching me is that there are some concepts that are common to RDBMSes. It is helping me to identify some of those concepts, and I learn a lot from the similarities and differences.… Read the rest
Continue reading »
The database conference organization I’ve focused on for most of my career – IDUG (International Db2 Users Group) is not interested in cross-platform content. Despite being a top speaker most conferences, they are not interested in content from me that covers things like transitioning from Db2 to MySQL or technical writing about database concepts.… Read the rest
Continue reading »
There have been a few times in my career where I have been stunned by something I have seen while at work.
Sometimes it was the good type of stunned. Like the first time first time I observed a truly obnoxiously large workload hit my production database and the database still performed like a champ.… Read the rest
Continue reading »
I’m a couple of months into working with MySQL, and thought I’d share some resources and thoughts on what I’m learning and what is working. At least half of that time was dedicated to a very in-depth onboarding process that barely mentioned a database at all in about a month of content, so it’s closer to a month in.… Read the rest
Continue reading »
Many RDBMSes have similar structures and concepts. In this post, I’m going to compare and contrast IBM Db2’s concept of a clustered index and MySQL’s concept of a clustered index.
An index is generally a way of organizing data in a way that it will be quicker to access than scanning through all of a table.… Read the rest
Continue reading »
I’ve struggled to write this blog entry to appropriately convey all aspects of what I want to say. This is my third attempt, and I finally think it does things justice.
As part of my publicly shared data science journey, I’ve continued to read job postings, even while reasonably satisfied with my current job.… Read the rest
Continue reading »
Db2u is here as a technical preview! I’ll cover the basics of how to set it up for a local sandbox, and leave the details and whys to future articles. IBM has stated that db2u will be available in GA later this year on Amazon EKS and Azure EKS, but meanwhile, I’ve got the technical preview up and running on my MacBook Pro!… Read the rest
Continue reading »