The Tuple Relational Calculus

Posted By on October 4, 2014


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The Relational Algebra
Example Queries in tuple relational calculas

The Tuple Relational Calculus

  1. The tuple relational calculus is a nonprocedural language. (The relational algebra was procedural.)We must provide a formal description of the information desired.
  2. A query in the tuple relational calculus is expressed as

    i.e. the set of tuples for which predicate is true.

  3. We also use the notation
    • to indicate the value of tuple on attribute .
    • to show that tuple is in relation .

 

The Relational Algebra
Example Queries in tuple relational calculas

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Posted by Akash Kurup

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