[GRASSLIST:7514] Re: rpms - v.db.update

GRASS GRASS user
,
1

Hi Helli,

Subject:
[GRASSLIST:7510] rpm¿s - v.db.update
From:
Helmut Kudrnovsky <hellik@web.de>
Date:
Sun, 10 Jul 2005 14:11:22 +0200
To:
GRASSLIST@baylor.edu

To:
GRASSLIST@baylor.edu

dear grass-friends,

i have downloaded the actual suse-rpm´s from the link on the official site (http://www.gdf-hannover.de/software).

the files are called:

geos-2.0.0-1.suse91.i586.rpm
grass-6.0.0-1.suse91.i586.rpm
...

i wanted to install the files with yast on my 9.2.suse-machine, but nothing happend. i had to rename alle the files without *.suse91.* (grass-6.0.0-1.i586.rpm, etc.), then i could install them without problems.

--------------

i have a polygon-vector-layer in grass with a lot columns in the attribute table.

i've looked in the manual of v.db.update, but there is still a question:

i have three coloumns BID, GDNR, PROJNR, FNR (all number-coloumns)

is it possible to update the coloumn BID with an expression like GDNR + PROJNR + FNR (the sum of the mathematical addition) or FNR + (PROJNR * 100) + (GDNR * 10000).

Try db.execute. There you can use different SQL-commands to work on the attributes.

i tried this above, but i always get an error-message.

thanks with greetings from tyrol
helli

greetings from tyrol too!!
Michael