Because there is a lot of software for MySql.
You have a choice also.
You can install and use MySql or you can install something that allows you to use DB2 while your applications think it's using MySql.
From: "James H. H. Lampert" <jamesl@xxxxxxxxxxxxxxxxx>
Date: Fri, 31 Jan 2014 10:47:54
To: Midrange Systems Technical Discussion<midrange-l@xxxxxxxxxxxx>
Reply-To: Midrange Systems Technical Discussion <midrange-l@xxxxxxxxxxxx>
Subject: Saw something weird on a customer box
While scanning through a customer's libraries, to see if they had any
email-sending product installed, I noticed a library called ZMYSQL.
What is this? MySQL for AS/400? Why would one even need such a thing,
with DB2/400 built into the firmware?