GRASS logo

Note: A new GRASS GIS stable version has been released: GRASS GIS 7, available here. And see the new manual page here

NAME

v.db.select - Prints vector map attributes.

KEYWORDS

vector, database, attribute table

SYNOPSIS

v.db.select
v.db.select help
v.db.select [-rcv] map=name [layer=integer] [columns=name[,name,...]] [where=sql_query] [fs=character] [vs=character] [nv=string] [file=name] [--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 < 1000 and inhab >= 10000
fs=character
Field separator
Output field separator
Default: |
vs=character
Field separator
Output vertical record separator
nv=string
Null value indicator
file=name
Name for output file (if omitted or "-" output to stdout)

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.select

AUTHOR

Radim Blazek, ITC-Irst, Trento, Italy
Minimal region extent added by Martin Landa, FBK-irst (formerly ITC-irst), Trento, Italy (2008/08)

Last changed: $Date: 2011-11-08 01:42:51 -0800 (Tue, 08 Nov 2011) $


Main index - vector index - Full index

© 2003-2016 GRASS Development Team