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- W2004851292 abstract "Although “ now ” is expressed in SQL and CURRENT_TIMESTAMP within queries, this value cannot be stored in the database. How ever, this notion of an ever-increasing current-time value has been reflected in some temporal data models by inclusion of database-resident variables, such as “ now ” “ until-changed, ” “**,” “@,” and “-”. Time variables are very desirable, but their used also leads to a new type of database, consisting of tuples with variables, termed a variable database." @default.
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- W2004851292 date "1997-06-01" @default.
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- W2004851292 title "On the semantics of “now” in databases" @default.
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- W2004851292 doi "https://doi.org/10.1145/249978.249980" @default.
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