Expressions and Predicates

  • Helen Borrie


In algebra, an expression such as a + b = c can be resolved as “true” or “false” by substituting constant values into a, b, and c. Alternatively, given values for any two of a, b, or c, we can calculate the missing value. So it is with SQL expressions because, simply, they are substitution formulae.


Search Condition Collation Sequence External Function String Function Function Declaration 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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Copyright information

© Helen Borrie and IBPhoenix 2004

Authors and Affiliations

  • Helen Borrie
    • 1
  1. 1.FirebirdSQL Foundation Inc.Australia

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