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v.db.select.1grass
Langue: en
Version: 334492 (ubuntu - 24/10/10)
Section: 1 (Commandes utilisateur)
NAME
v.db.select - Prints vector map attributes.KEYWORDS
vector, database, attribute tableSYNOPSIS
v.db.selectv.db.select help
v.db.select [-rcv] map=name [layer=integer] [columns=name[,name,...]] [where=sql_query] [fs=character] [vs=character] [nv=string] [--verbose] [--quiet]
Flags:
- -r
Print minimal region extent of selected vector features instead of attributes- -c
Do not include column names in output- -v
Vertical output (instead of horizontal)- --verbose
Verbose module output- --quiet
Quiet module output
Parameters:
- map=name
Name of input vector map- layer=integer
Layer number
A single vector map can be connected to multiple database tables. This number determines which table to use.
Default: 1- columns=name[,name,...]
Name of attribute column(s)- where=sql_query
WHERE conditions of SQL statement without 'where' keyword
Example: income = 10000- fs=character
Output field separator
Default: |- vs=character
Output vertical record separator- nv=string
Null value indicator
DESCRIPTION
v.db.select prints attributes of a vector map from one or several user selected attribute table columns.EXAMPLES
Select and show entire table:v.db.select map=roads
cat|label
0|no data
1|interstate
2|primary highway, hard surface
3|secondary highway, hard surface
4|light-duty road, improved surface
5|unimproved road
Select and show single column from table (multiple columns can be specified as comma separated list):
v.db.select map=roads column=label
label
no data
interstate
primary highway, hard surface
secondary highway, hard surface
light-duty road, improved surface
unimproved road
Print region extent of selected vector features:
v.db.select -r map=roads where="label ~ 'highway'"
n=4928063.398015
s=4914089.153930
w=589532.054964
e=609527.210215
SEE ALSO
db.selectAUTHOR
Radim Blazek, ITC-Irst, Trento, ItalyMinimal region extent added by Martin Landa, FBK-irst (formerly ITC-irst), Trento, Italy (2008/08)
Last changed: $Date: 2008-08-23 22:37:32 +0200 (sab, 23 ago 2008) $
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