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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.

The dangers of replication filters in MySQL

The dangers of replication filters in MySQL

MySQL supports replication filters and binlog filters. These features are powerful, but dangerous. Here you'll find out the risks, and how to mitigate them. ...
Foreign Key bugs in MySQL and MariaDB

Foreign Key bugs in MySQL and MariaDB

Foreign keys are a controversial topic. MySQL and MariaDB implementation has several bugs and limitations, that are discussed here. ...
Case sensitivity in MySQL and MariaDB queries

Case sensitivity in MySQL and MariaDB queries

Maybe you’re wondering why in MySQL/MariaDB 'string' seems to be the same as 'STRING'. Or maybe that’s not the case for you, but you would like to make a case insensitive search. This article explains how to write a case ... ...
Optimising or fixing SQL queries: how to ask for help

Optimising or fixing SQL queries: how to ask for help

If you need free help or paid support, you should phrase your questions correctly and provide the necessary information. ...
London Meetup – Open Source Communities: vendors and users working together (September 2019)

London Meetup – Open Source Communities: vendors and users working together (September 2019)

Open Source Communities: vendors and users working together. Event organised by London open source databases meetup, on 18th September. ...