Research on Inquiry Processing Based on ExtendedRelation Model Under Null Value CircumstancesJ. Journal of Computer Research and Development, 1994, 31(10).
Citation:
Research on Inquiry Processing Based on ExtendedRelation Model Under Null Value CircumstancesJ. Journal of Computer Research and Development, 1994, 31(10).
Research on Inquiry Processing Based on ExtendedRelation Model Under Null Value CircumstancesJ. Journal of Computer Research and Development, 1994, 31(10).
Citation:
Research on Inquiry Processing Based on ExtendedRelation Model Under Null Value CircumstancesJ. Journal of Computer Research and Development, 1994, 31(10).
Research on Inquiry Processing Based on ExtendedRelation Model Under Null Value Circumstances
The update operation of database tends to become more complex, because null valueappears.To meet the needs of updating, the extended relation model is founded. In this paper, theupdate processing is discussed based on this model, and the corresponding inquiry strategy and implementation procedure are given.
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