This is the command v.db.dropcolumngrass that can be run in the OnWorks free hosting provider using one of our multiple free online workstations such as Ubuntu Online, Fedora Online, Windows online emulator or MAC OS online emulator
PROGRAM:
NAME
v.db.dropcolumn - Drops a column from the attribute table connected to a given vector
map.
KEYWORDS
vector, attribute table, database
SYNOPSIS
v.db.dropcolumn
v.db.dropcolumn --help
v.db.dropcolumn map=name [layer=string] columns=name[,name,...] [--help] [--verbose]
[--quiet] [--ui]
Flags:
--help
Print usage summary
--verbose
Verbose module output
--quiet
Quiet module output
--ui
Force launching GUI dialog
Parameters:
map=name [required]
Name of vector map
Or data source for direct OGR access
layer=string
Layer number or name
Vector features can have category values in different layers. This number determines
which layer to use. When used with direct OGR access this is the layer name.
Default: 1
columns=name[,name,...] [required]
Name of attribute column(s) to drop
DESCRIPTION
v.db.dropcolumn drops a column from the attribute table connected to a given vector map.
It automatically checks the connection for the specified layer. v.db.dropcolumn omits to
delete the ’cat’ column which is relevant to keep the connection between vector map and
table.
NOTES
v.db.dropcolumn is a front-end to db.execute to allow easier usage.
The existing database connection(s) can be verified with v.db.connect.
EXAMPLES
Dropping a column:
g.copy vect=roadsmajor,myroads
v.info -c myroads
v.db.dropcolumn myroads column=SHAPE_LEN
v.info -c myroads
Use v.db.dropcolumngrass online using onworks.net services
