Thanks Dmitry,
That explains its avoidance of this index. My issue is that a lot of queries
are of similar form, so I was hoping to create some sort of index/indices to
improve performance. I sometimes need equality to specific TABLE1ID records,
but often it is a range (or an exists on another
30.05.2014 06:11, s3057...@yahoo.com wrote:
> CREATE INDEX IX_TA BLE2_EXPECTED ON TABLE2 (TABLE1ID, VALIDFROM, VALIDTO);
> COMMIT;
>
> -- SIMPLE QUERY
>
> SELECT *
> FROM TABLE2 T
> WHERE T.TABLE1ID BETWEEN 1000 AND 1999
> AND T.VALIDFROM <= CURRENT_DATE
> AND T.VALIDTO >= CURRENT_DATE
>
> The sim
