I found a good reference page for Debian package management commands apt-??? and dpkg.
Check out http://diablo.ucsc.edu/~wgscott/debian/apt-dpkg-ref.html
Extending MySQL Capabilities with UDFs, Plugins and Components
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 For the purposes of this post I will be using the current LTS version MySQL 8.
Producing One-Sample Z-Test statistics with SQL
The one-sample Z-test determines whether a sample mean differs significantly from a known population mean when the population standard deviation is also known. It is the appropriate test when the population parameters are established — quality control benchmarks, national averages, long-run process measurements — and you want to evaluate whether a new sample is consistent with them.
Switching to JSON Error Logging in MySQL
You no longer need to manually parse the MySQL Error log via scripting and RegEx pattern matching. Using the component_log_sink_json component you can obtain JSON error logging for easier parsing.