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Posted by meeraguna on 12/07/06 14:26
We have 20 -30 normalized tables in our dartabase . Also we have 4
tables where we store the calculated data fron those normalised tables.
The Reason we have these 4 denormalised tables is when we try to do
the calcultion on the fly, our site becomes very slow. So We have
precalculated and stored it in 4 tables.
The Process we use to do the precalcultion, will get do the
calculation and and store it in a temp table. It will compare the the
temp with denormalised tables and insert new rows , delte the old one
ans update if any changes.This process take about 20 mins - 60mins. It
takes long time because in this process we first do the calculation
regardless of changes and then do a compare to see what are changed and
remove if any rows are deleted, and insert new rowsand update the
changes.
Now we like to capture the rows/columns changed in the normalised
tables and do only those chages to the denormalised table , which we
are hoping will reduce the processing time by atleast 50%
WE have upgraded to SQL SERVER 2005.So We like to use the new
technology for this process.
I have to design the a model to capture the changes and updated only
those changes.
I have the list of normalised tables and te columns which will affect
the end results.
I thought of using Triggers or OUTPUT clause to capture the changes.
Please help me with the any ideas how to design the new process
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