EDW-2011-Johnston

Recommendations

Info

VIEWS: CONVENTIONAL TABLES• In a bitemporal table, conventional data are all and only thoserows which are current in both time periods.• In which Now() is >= their begin points in time, and• in which Now() is < their end points in time.• This provides full upward compatibility for conventional tableswhich are converted to bitemporal tables.• Existing maintenance transactions are unaffected.• Existing queries are unaffected.Slide 54.EDW 2011Understanding Bitemporal Data. © 2011, Asserted Versioning, LLC
VIEWS: HISTORY/VERSION TABLES• In a • bitemporal In a bitemporal table, table, historical history/version versions are data all are and all only and those only rows thosewhich rows are which in the table are current with a in past one point time or period range (transaction/assertionin effective time, at onepoint time). in assertion time.• In which Now() is = is the < its assertion end point begin time. point in time, and• in which Now() is < the assertion end point in time.• This works for current versions and future versions as well.• This provides full upward compatibility for existing history/versiontables which are converted to bitemporal tables.• Existing maintenance transactions are unaffected.• Existing queries are unaffected.Slide 55.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 and 12: TWO KINDS OF CHANGESThings change s
Page 13 and 14: TWO “WHEN” QUESTIONSWhen were t
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: Part XISome Important ViewsSlide 53
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
show all

EDW-2011-Johnston

Create successful ePaper yourself

Delete template?

Save as template?