On Thu, Sep 11, 2008 at 11:15 AM, Alan Hodgson <ahodgson@xxxxxxxxx> wrote: > On Thursday 11 September 2008, "Gauthier, Dave" <dave.gauthier@xxxxxxxxx> > wrote: >> I have a job that loads a large table, but then has to "update" about >> half the records for various reasons. My perception of what happens on >> update for a particular recors is... >> >> - a new record will be inserted with the updated value(s). >> >> - The old record is marked as being obselete. >> > > What you might consider doing is loading the data into a temp table, > updating it there, then copying that data into the final destination. > Depending on the indexes involved, you might even find this to be faster. Especially if you can drop then recreate them on the real table before reimporting them to it.
