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Tag: Db2vsMySQL

December 6, 2022 Featured

Comparing Db2 and MySQL: Naming Objects and Reserved Words

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

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November 8, 2022 Featured

Comparing Db2 and MySQL: Explain

The goal of this article is to to take one query and use the explain facilities of Db2 to walk through it, and then do the same with MySQL, and then show some of the optimizations I might make for the query and why.… Read the rest

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November 3, 2022 Featured

Comparing Db2 and MySQL: NULL in Indexes

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

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October 27, 2022 Featured

Comparing MySQL and Db2: Table and Index Structure

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

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June 9, 2022 Featured

My Early Experience Learning MySQL as a Db2 DBA

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

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March 17, 2022 Uncategorized

When an Index is More Than an Index: Clustered Indexes

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.

Index vs. 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

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