You can create a function-based index in Oracle that leverages the fact that NULL values aren't stored in b-tree indexes. Something like.
You can create a function-based index in Oracle that leverages the fact that NULL values aren't stored in b-tree indexes. Something like CREATE INDEX TimeSeriesPeriodSs1 ON TimeSeriesPeriod( (CASE WHEN completionStatus = 'Complete' AND validationStatus = 'Pending' THEN validationStatus ELSE NULL END), (CASE WHEN completionStatus = 'Complete' AND validationStatus = 'Pending' THEN completionStatus ELSE NULL END) ).
Damn, foiled agin... – Alex Poole May 9 '11 at 17:14.
You might be able to use a function-based index for this, though it isn't very pleasant for this scenario: create index TimeSeriesPeriodSs1 on TimeSeriesPeriod ( case when validationStatus= N'Pending' and completionStatus= N'Complete' then validationStatus else null end, case when validationStatus= N'Pending' and completionStatus= N'Complete' then completionStatus else null end); You'd have to make the query's where clause match exactly to make it use the index though. Select from TimeSeriesPeriod where case when validationStatus= N'Pending' and completionStatus= N'Complete' then validationStatus else null end = N'Pending' and case when validationStatus= N'Pending' and completionStatus= N'Complete' then completionStatus else null end = N'Complete'; This would be a lot neater if you can define (deterministic) functions to do the case. See here for some further info and examples.
Or this, from a quick Google.
1 +1 for including where clause to use the function based index. This is a big difference in using SQL Server's filtered index versus Oracle's function based index. – Shannon Severance May 9 '11 at 18:51.
Here's a small variant on Justin and Alex's answer that might save further index space and makes the modified query more readable IMO: CREATE INDEX TimeSeriesPeriodSs1 ON TimeSeriesPeriod( (CASE WHEN completionStatus = 'Complete' AND validationStatus = 'Pending' THEN 1 ELSE NULL END); SELECT * FROM TimeSeriesPeriod WHERE 1 = (CASE WHEN completionStatus = 'Complete' AND validationStatus = 'Pending' THEN 1 ELSE NULL END).
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.