PPT Slide

Single or Interval Values

• For attribute value types of REAL, INTEGER and COUNT attribute values may be either a single value or an interval of numbers.

• There are eight types of intervals:
  • Four bounded interval types:
    • (a, b), [a, b), (a, b], and [a, b]
  • Four unbounded interval types:
    • (a, +infinity), [a, +infinity), (-infinity, b), and (-infinity, b]

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