Top 5: blog posts of November 2025

December 1, 2025 No Comments

By the end of November, over 100 articles have been published! As usual, here is my monthly list of what I consider to be essential reading, focused on those that offer fresh insights or deal with common issues in an easy-to-understand and entertaining way.

I hope you enjoy reading it as much as I do, so here it is, without further delay!

Optimizing Composite Indexes in Oracle

Are you planning to create an index on many columns? Alireza gives us some advice for deciding the order in which to declare them.

I want to read it!

NVL, NVL2 e COALESCE no Oracle SQL: diferenças e exemplos práticos de uso

If you only use NVL to handle NULL values, Roberto reminds us that there are more than one way to skin a cat!

I want to read it!

Umstellung von Klassischen/Mixed Audit auf Unified Auditing in der 19c

As of 26ai, unified auditing is mandatory. Thankfully, Gunther provides us with detailed instructions on how to implement it.

I want to read it!

Legacy Clients on 19c

Did you upgrade to Oracle 19c and now your old clients are unable to connect? Urh offers some options to try to get things back to normal.