Bruce Momjian: Calling Functions from SQL

There was some nifty function-calling syntax used in my previous blog post about virtual columns, so I now want to cover function calling syntax in detail. Traditionally, functions are called in SQL using a procedural syntax, e.g. function(argument):

SELECT upper('a');
 upper
-------
 A
 
select pow(2, 4);
 pow
-----
  16

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