* Thomas Holmgren ([EMAIL PROTECTED]) wrote: > I have a large number of clients synchronizing with a central database. > The clients update their local data by polling the database for changes > at fixed intervals. I need an efficient way of determining if data in a > table has been changed (either updated, deleted or inserted). Can this > be achieved without scanning the tables using expensive SQL? (my tables > are _big_!) Is there some way to get a "time for last update" for a > specific table? Or something similar I can use?
I would guess that you could create a trigger for the tables which
updates a seperate (small) table with the last-changed timestamp.
Stephen
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