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- W2152923833 abstract "A formal operational semantics is given for update operations on multilevel relations, i.e., relations in which individual data elements are classified at different levels. For this purpose, the familiar INSERT, UPDATE and DELETE operations of SQL are suitably generalized to cope with polyinstantiation. The authors conjecture that these operations are consistent (or sound) in that all relations which can be constructed will satisfy the basic integrity properties required of multilevel relations. They also conjecture that the operations are complete in that every multilevel relation can be constructed by some sequence of these operations. >" @default.
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- W2152923833 date "2002-12-04" @default.
- W2152923833 modified "2023-09-25" @default.
- W2152923833 title "Update semantics for multilevel relations" @default.
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- W2152923833 doi "https://doi.org/10.1109/csac.1990.143757" @default.
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