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NAME

       db.dropcolumn  - Drops a column from selected attribute table.

KEYWORDS

       database, attribute table

SYNOPSIS

       db.dropcolumn
       db.dropcolumn --help
       db.dropcolumn [-f] table=name column=name  [--help]  [--verbose]  [--quiet]  [--ui]

   Flags:
       -f
           Force removal (required for actual deletion of files)

       --help
           Print usage summary

       --verbose
           Verbose module output

       --quiet
           Quiet module output

       --ui
           Force launching GUI dialog

   Parameters:
       table=name [required]
           Name of attribute table

       column=name [required]
           Name of attribute column

DESCRIPTION

       db.dropcolumn  drops  a column from an attribute table.  If the -f force flag is not given
       then nothing is removed, instead a preview of the action to be taken is printed.

NOTES

       db.dropcolumn is a front-end to db.execute to allow easier usage with a special workaround
       for the SQLite driver to support column drop also for SQLite tables.

EXAMPLE

       Dropping a column (North Carolina sample dataset):

       # work on own copy
       g.copy vect=roadsmajor,myroads
       db.describe -c myroads
       # only shows what would happen:
       db.dropcolumn myroads column=SHAPE_LEN
       # actually drops the column
       db.dropcolumn -f myroads column=SHAPE_LEN
       db.describe -c myroads

SEE ALSO

        db.describe, db.droptable, db.execute, v.db.dropcolumn, GRASS SQL interface

AUTHOR

       Markus Neteler

       Last changed: $Date: 2011-11-08 22:24:20 +0100 (Tue, 08 Nov 2011) $

SOURCE CODE

       Available at: db.dropcolumn source code (history)

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       © 2003-2019 GRASS Development Team, GRASS GIS 7.6.1 Reference Manual