At the recent leaders summit of world leaders in Oracle, Java and MySQL user communities I gave a presentation on Why Upgrade to MySQL 5.5
This is a more high level overview presentation, specifically designed for Oracle resources with little to no knowledge about MySQL, however it provides a great management approach to the consideration of using the current MySQL GA version.
I have a more detailed technical presentation from last year on Reasons to Use MySQL 5.5 .
The Chi-Squared test is one of the most widely used statistical tests for categorical data. It comes in two flavors: the goodness-of-fit test asks whether an observed frequency distribution matches an expected one, while the test of independence asks whether two categorical variables are associated with each other.
I am excited to be speaking at COSCUP 2026 in Taipei, Taiwan on August 8th and 9th. COSCUP (Conference for Open Source Coders, Users and Promoters) is one of the largest open source conferences in Asia, and it is always a privilege to present to the engaged and technically sharp community there.
The two sample t-test for equal variance is a statistical test to determine if the means of two groups are different enough that the difference is likely caused by some underlying difference, rather than random chance.
