MySQL Conference – For Oracle DBAs and Developers

I have just completed my presentation at the MySQL Conference 2007 on [MySQL for Oracle DBAs and Developers][1].

Not mentioned in my slides, but referenced during the presentation was what I consider the most important page to document from the MySQL Manual — 5.2.1. Option and Variable Reference

You can download a PDF copy of my presentation here.

Tagged with: Databases General MySQL MySQL Conference &Amp; Expo 2007 Oracle

Producing IQR and Outlier statistics with SQL

The interquartile range (IQR) measures the spread of the middle 50% of a distribution — the distance between the first quartile (Q1) and the third quartile (Q3). Combined with Tukey’s 1.

Producing Mode statistics with SQL

The mode is the value or values that appear most frequently in a dataset. Unlike the mean or median, it applies naturally to categorical and ordinal data — star ratings, product codes, survey responses — and reveals what is most common, not what is average.

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