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Transaction time
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== History == The term transaction time was coined by [[Richard T. Snodgrass]] and his doctoral student Ilsoo Ahn (1986).<ref>{{Cite journal | last1 = Snodgrass | last2 = Ilsoo Ahn | title = Temporal Databases | journal = Computer | volume = 19 | issue = 9 | pages = 35 | year = 1986 | doi = 10.1109/MC.1986.1663327| url = http://www2.cs.arizona.edu/~rts/pubs/Computer.pdf }}</ref> As of December 2011, ISO/IEC 9075, Database Language [[SQL:2011]] Part 2: SQL/Foundation included clauses in table definitions to define "system-versioned tables" (that is, transaction-time tables).
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