Besides backup, any IT division should have a disaster recovery plan. You will find a few tips below relating to the development of such a plan and to what issues one should pay special attention in the course of backup planning.
PrimaryKey, Score, DateField 1, 50, 1/1/2016 2, 12, 1/1/2016 1, 75, 1/12/2016 1, 80, 1/15/2016 2, 35, 1/16/2016
PrimaryKey, Score, LastScore, OtherFields... 1, 80, 75, data... 2, 35, 12, data...
select a.RTPropertyUniqueIdentifier, max(case when seqnum = 1 then Scores end) as score, max(case when seqnum = 2 then Scores end) as score_previous from (select a.*, row_number() over (partition by RTPropertyUniqueIdentifier order by LoadDate desc) as seqnum from PROPERTY_SCORE a ) a where seqnum <= 2 -- This should help performance of the `group by` group by a.RTPropertyUniqueIdentifier
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