SQL Practical Guide

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changes.mady.by.user David Markwell

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  • The pair consists of an attribute-constraint and a value-constraint:
    • The attribute-constraint must be separated from the value constraint by an = (equals) sign 
    • Both the constraints may be specified using any of the forms permitted for the focus concept constraint (see 1)
  • Attribute attribute-value-constraint pairs must be separated by a comma from any following attribute-value-constraint pair
  • NOTE: The procedure does not support:
    • Nested refinement constraints
    • Role grouping constraints
    • Cardinality constraints

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