| From: | Peter Eisentraut <peter_e(at)gmx(dot)net> |
|---|---|
| To: | Thomas SMETS <tsmets(at)altern(dot)org> |
| Cc: | psql novice <pgsql-novice(at)postgresql(dot)org>, psql sql <pgsql-sql(at)postgresql(dot)org> |
| Subject: | Re: [SQL] Casting |
| Date: | 2001-01-05 18:42:38 |
| Message-ID: | Pine.LNX.4.30.0101051940280.979-100000@peter.localdomain |
| Views: | Raw Message | Whole Thread | Download mbox | Resend email |
| Thread: | |
| Lists: | pgsql-novice pgsql-sql |
Thomas SMETS writes:
> I'm removing charaters from a String which should be numbers.
> I then want to make calculations on these numbers (calculate the ISBN
> number).
(You might want to look into contrib/isbn_issn for an isbn type.)
> Do I have to cast the char into int's before I can do the calulations.
Depends on the calculation. I'd just try to see if it works. When in
doubt add casts.
> Also I looked in the User manual but could not find the modulo function
> where is it ?
5 % 4
mod(5, 4)
--
Peter Eisentraut peter_e(at)gmx(dot)net http://yi.org/peter-e/
| From | Date | Subject | |
|---|---|---|---|
| Next Message | Andrew McMillan | 2001-01-05 23:41:52 | Re: MSSQL to PgSQL |
| Previous Message | Paul Skinner | 2001-01-05 17:43:02 | Determining parent. |
| From | Date | Subject | |
|---|---|---|---|
| Next Message | Tom Lane | 2001-01-05 19:02:31 | Re: pqReadData() |
| Previous Message | Marcos Aurélio S. da Silva | 2001-01-05 18:32:02 | Postgresql database access |