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I am a freelancer database consultant, specialised in MySQL and other open source databases.

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Knowledge Base

Federico-Razzoli.com articles aim to form a shared knowledge base on open source database systems. Feel free to read, contribute with comments, and share links to these contents.

Logging all MySQL queries into the Slow Log

Logging all MySQL queries into the Slow Log

MySQL logs slow queries into the Slow Log. But it's preferable to log all the queries, not just some of them. This article shows how to log all available information. ...
Two Weeks of Databases

Two Weeks of Databases

Two weeks of live interviews to relevant database persons, starting from 4th May. ...
When to use NULLable columns in relational databases

When to use NULLable columns in relational databases

There are cases when using NULL in an SQL database is desirable. However, there are always alternatives. ...
Webinar: JSON in MySQL and MariaDB databases

Webinar: JSON in MySQL and MariaDB databases

Webinar on 6th March 2020: JSON in MySQL and MariaDB databases. ...
PostgreSQL Features Missing in Amazon Redshift

PostgreSQL Features Missing in Amazon Redshift

Many PostgreSQL features are not available in Redshift, particularly those which are not suitable for a database cluster or for analytics, and those that Amazon didn't consider important enough to spend the necessary resources to maintain them. ...