More on Intervals

• Ranges for numeric types

  • Count, Integer, Real
  • Numeric attribute values are either
    • single value
    • interval value
      • (a, b) All values ? a and ? b
      • [a,b) All values ? a and ? b
      • (a, b] All values ? a and ? b
      • [a, b] All values ? a and ? b
      • (a, ?) All values ? a
      • [a, ?) All values ? a
      • (-?, b) All values ? b
      • (-?, b] All values ? b

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