by Craig S. Mullins | Jun 3, 2022 | AI, Db2 13, manuals, sql
Yesterday I posted a brief piece about the new version of Db2 for z/OS that is now generally available: Db2 13 for z/OS is Here! It is always an exciting time when a new version of Db2 for z/OS is unleashed on the world and one of the first things I recommend is to...
by Craig S. Mullins | Dec 13, 2021 | design, include columns, index, performance, sql
One of the constant struggles with Db2 development, and indeed developing for any relational DBMS, is designing and creating appropriate indexes. Perhaps the most important thing you can do to assure optimal application performance when accessing data in a...
by Craig S. Mullins | Nov 15, 2021 | BIND, Dynamic SQL, sql
Mainframe application development has changed dramatically during the lifetime of Db2. Way back in the beginning, and even for a long time thereafter, most Db2 programs were written in COBOL and coded to use static SQL. This meant that the SQL was bound before...
by Craig S. Mullins | Aug 16, 2021 | CTE, sql
Sometimes what seems like a simple request might take a little bit of thinking to devise and implement a solution. Recently, I was asked how to write SQL that returns the nth maximum value from a column. If you think about it, it isn't too difficult.Assume that you...
by Craig S. Mullins | Nov 18, 2020 | DELETE, sql
I regularly receive database- and Db2-related questions via e-mail. And that is great, but I don't always get a chance to respond to everything. If you've sent me a question and I haven't replied, I apologize. But every now and then, I will use one of the e-mail...
by Modern SQL | Oct 16, 2020 | sql
Markus recently published a video in which he talks about Java & SQL, and that lead to a little discussion with me on Twitter. The conclusion Markus often came to is that one has to revert to writing plain SQL for some of the more advanced use cases because of...
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