Skip site navigation (1)Skip section navigation (2)

FreeBSD Manual Pages

  
 
  

home | help
v.db.dropcolumn(1)	    GRASS GIS User's Manual	    v.db.dropcolumn(1)

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=nameA [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 ac-
	   cess	this is	the layer name.
	   Default: 1

       columns=name[,name,...]A	[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	speci-
       fied  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)

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

       A(C) 2003-2020 GRASS Development	Team, GRASS GIS	7.8.3 Reference	Manual

GRASS 7.8.3						    v.db.dropcolumn(1)

NAME | KEYWORDS | SYNOPSIS | DESCRIPTION | NOTES | EXAMPLES | SEE ALSO | AUTHOR | SOURCE CODE

Want to link to this manual page? Use this URL:
<https://www.freebsd.org/cgi/man.cgi?query=v.db.dropcolumn&sektion=1&manpath=FreeBSD+12.1-RELEASE+and+Ports>

home | help