Db2 for z/OS Character Columns: Thoughts on CHAR versus VARCHAR

Recently, I received from a Db2 for z/OS DBA a question: for a table column that will hold character string values, are there any recommendations concerning the use of CHAR (fixed-length) versus VARCHAR (variable-length) for the column's data type?That question has...

A Case Study – Db2 for z/OS High-Performance DBATs

Over the years, I have posted several entries to this blog that have covered various aspects of Db2 for z/OS high-performance DBATs (examples are entries posted in 2016 and 2013). Over the past couple of weeks, I have been working with a Db2 for z/OS administrator who...

The Various Aspects of Db2 for z/OS Data Encryption

Just last week, a person on the Db2 for z/OS team at an organization asked me for some guidance regarding data encryption in a Db2 context. In responding to that request, I noted that Db2 for z/OS data encryption is a multifaceted topic, and I proceeded to...