GRASS logo

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

Table of contents

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

SEE ALSO

db.connect, db.dropcolumn, db.execute, v.db.addcolumn, v.db.connect, v.db.droptable, v.db.select, v.db.update

GRASS SQL interface

AUTHOR

Markus Neteler

SOURCE CODE

Available at: v.db.dropcolumn source code (history)

Latest change: Thursday Feb 03 11:10:06 2022 in commit: 547ff44e6aecfb4c9cbf6a4717fc14e521bec0be

Main index | Vector index | Topics index | Keywords index | Graphical index | Full index

© 2003-2023 GRASS Development Team, GRASS GIS 8.3.dev Reference Manual