Mark Collette wrote:
>
> Now, I've added the infrequentId columns to both, as an optimization, so
> that I can quickly find the InfrequentTable entry for a given
> FrequentTable entry. I've done this because I want to speed up
> SELECTs. Any new INSERTs are working just fine. But, all my legacy
> entries, are not linked up yet. I need to know how I can UPDATE the
> FrequentTable rows, where their infrequentId is zero, to point at the
> last InfrequentTable entry whose timestamp ts is before its own
> timestamp ts.
How do you distinguish between InfrequentTable entries when their
timestamp is the same?
-- Richard Huxton Archonet Ltd