| From: | ivan marchesini <marchesini(at)unipg(dot)it> |
|---|---|
| To: | pgsql-sql(at)postgresql(dot)org |
| Subject: | newbie question |
| Date: | 2006-03-03 09:43:09 |
| Message-ID: | 1141378989.5311.13.camel@geologia5.agora.ing.unipg.it |
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| Thread: | |
| Lists: | pgsql-sql |
Dear users..
I have fastly created a table in a postgresql database..
some columns where edited by hand (columns A, B, C), and some others
(columns D, E, F) have been calculated as a result of mathematical
equation (where the factors are the A, B, C columns)....
now I simply need to change some values in the A, B, C columns and I
would like to obtain the correct values in the D, E, F column...
I know that this is a tipical problem of a spreadsheet but how can I
solve it with a DBMS??
there a way to impose some constrain, also after the table is already
filled with values??
I need only some suggestions to start.. then I can go on by myself!!
thank you very much
Ivan
--
Ivan Marchesini
Department of Civil and Environmental Engineering
University of Perugia
Via G. Duranti 93/a
06125
Perugia (Italy)
e-mail: marchesini(at)unipg(dot)it
ivan(dot)marchesini(at)gmail(dot)com
tel: +39(0)755853760
fax: +39(0)755853756
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