The Hobbyist and the Professional

I first coined this term in February 2006 in a paper titled “Overcoming the Challenges of Establishing Service and Support Channels” for the conference “Implementing Open Source for Optimal Business Performance” View Paper.

I must have referenced this several times, time to give this topic it’s due notice. In summary it targets three areas:

  • the lack of appropriate database design in open source projects
  • the lack of coding standards
  • the lack of sound programming principles

Here are the bullet points from the slide in a presentation.

Hobbyist

  • Download-able software and examples
  • Online tutorials
  • Books like Learn in 24 hours/For Dummies

Professional

  • Formal Qualifications
  • Grounding in sound programming practices
  • Understanding of SDLC principles
  • Worked in team environment

Middle Ground Developer

  • Time to skill verses output productivity
  • Depends on environment and requirements
Tagged with: Databases General Open Source

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.