Scaling Wisdom

The 20 second summary from the Scaling MySQL – Up or Out? from our panel of experts at 2008 MySQL Conference and Expo.

  • Paul Tuckfield from YouTube — The answers to everything is replication, you just have to rephrase the question.
  • Jeff Rothschild from Facebook — Memory, the source of all problems is your developers.
  • Domas for Wikipedia — You should be afraid that 10 min structural change may answer detailed problems.
  • Fahan Mashraqi from Fotolog — Architect property, the most optimized schema may not be enough, what is the cost of serving the data, no just the time to run the SQL.
  • John Allspaw from Flickr — There is nothing more permanent then a temporary solution
  • Monty Taylor from MySQL — You have to know what’s happening on every piece of your technology stack.
Tagged with: Databases MySQL MySQL User Conferences MySQL Users Conference 2008

Producing IQR and Outlier statistics with SQL

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

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.

Extending MySQL Capabilies with UDFs, Plugins and Components - Part 2

Extending MySQL Capabilies with UDFs, Plugins and Components - Part 2

MySQL offers three different approaches to extending the SQL capabilities with the default product you download and install. These are: User Defined Function (UDF) MySQL Manual MySQL Plugin MySQL Manual MySQL Component MySQL Manual In my prior post I provided a new uuidv function that accepted a numeric argument to return a string of the version of UUID specified.