Containment of Conjunctive Queries over Databases with Null Values - PowerPoint PPT Presentation

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Containment of Conjunctive Queries over Databases with Null Values

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Introduced for conjunctive queries (Chandra/Merlin 1977) Investigated for a wealth of query types ... However, nulls are ubiquitous in SQL databases. ICDT - 12 ... – PowerPoint PPT presentation

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