EDW-2011-Johnston

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TWO “WHEN” QUESTIONSWhen were things like that?When did our data say that thingswere like that?Example: On last April 1 st , who wereour then current clients?Example: On last April 1 st , who werelisted in our Client table ascurrent clients?These are completely different questions!Slide 12.EDW 2011Understanding Bitemporal Data. © 2011, Asserted Versioning, LLC
TWO “WHEN” QUESTIONSWhen were things like that?When did our data say things werelike that?Example: On July 1 st ,who did we say wereour current clients onApril 1 st ?Example: On October 15 th ,who did we say wereour current clients onApril 1 st ?Example: right now, whodo we say wereour current clients onApril 1 st ?These are completely different questions!Slide 13.EDW 2011Understanding Bitemporal Data. © 2011, Asserted Versioning, LLC
Page 1 and 2: UNDERSTANDING BITEMPORAL DATADetail
Page 3 and 4: READINGSRichard T. SnodgrassDevelop
Page 5 and 6: PRODUCTSOracle 11g, Workspace Manag
Page 7 and 8: PRODUCTSThe Asserted Versioning Fra
Page 9 and 10: Part IITwo Kinds of ChangesSlide 9.
Page 11: TWO KINDS OF CHANGESThings change s
Page 15 and 16: NON-TEMPORAL DATAclnt-idtxn-dtnameT
Page 21 and 22: Part IVPoint in Time VersioningSlid
Page 23 and 24: POINT IN TIME VERSIONINGclnt-idtxn-
Page 25 and 26: POINT IN TIME VERSIONINGclnt-idtxn-
Page 27 and 28: Part VDelete Flag VersioningSlide 2
Page 29 and 30: DELETE FLAG VERSIONINGclnt-idtxn-dt
Page 31 and 32: DELETE FLAG VERSIONINGclnt-idtxn-dt
Page 33 and 34: PERIOD OF TIME VERSIONINGclnt-id ef
Page 35 and 36: PERIOD OF TIME VERSIONINGclnt-id ef
Page 37 and 38: VERSIONS VS. CORRECTIONSclnt-id eff
Page 39 and 40: Part VIIIPeriod of Time PK Versioni
Page 41 and 42: Part IXBitemporal DataSlide 41.EDW
Page 43 and 44: BITEMPORAL DATAclnt-id eff-beg-dt e
Page 45 and 46: BITEMPORAL DATAclnt-id eff-beg-dt e
Page 47 and 48: Part XHiding the Complexities With
Page 49 and 50: VIEWS: A VERSION TABLEclnt-id eff-b
Page 51 and 52: VIEWS: A NON-TEMPORAL TABLEclnt-idn
Page 53 and 54: Part XISome Important ViewsSlide 53
Page 55 and 56: VIEWS: HISTORY/VERSION TABLES• In
Page 57 and 58: Part XIIVersioning,Standard Bitempo
Page 59 and 60: STANDARD BITEMPORAL DATACurrent Dat
Page 61 and 62: Part XIIIConclusionsSlide 61.EDW 20
Page 63:
QUESTIONS1. How do Kimball’s slow
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EDW-2011-Johnston

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