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Posted by Jens on 09/20/05 09:17
Its hard to give youan exact answer without having more information, a
good point would be to start at the bottom, the master records, there
you could have two columns holding the old and the new values. If the
key changes going down to deeper granularity you have to do the same
(new / old column).
The tables itself should be at last updates with updating the old
column with tne new column and then dropping (if you don´t want to
retain the old information) the old.
Its not quite easy and should be planned carefully (and tested of
course, with only a subset of data). But then you won´t need a single
update for every record exisiting.
HTH, Jens Suessmeyer.
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