text: ------------------------------------
  -- LinkedIn Learning ---------------
  -- Advanced SQL - Query Processing -
  -- Ami Levin 2020 ------------------
  -- .\Chapter6\Video1.sql -----------
  ------------------------------------
  
  -- Edgar F. Codd
  -- https://en.wikipedia.org/wiki/Edgar_F._Codd
  -- https://amzn.to/2OIMOQg
  
  -- Chris Date
  -- https://en.wikipedia.org/wiki/Christopher_J._Date
  -- https://amzn.to/31KbZXS
  
  -- Joe Celko
  -- https://en.wikipedia.org/wiki/Joe_Celko
  -- https://amzn.to/2SDQzYh
  
  -- David McGoveran
  -- https://en.wikipedia.org/wiki/David_McGoveran
  
  -- Fabian Pascal
  -- https://en.wikipedia.org/wiki/Fabian_Pascal
  -- http://www.dbdebunk.com/
  
  -- Hugh Darwen
  -- https://en.wikipedia.org/wiki/Hugh_Darwen
  