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Man Pages
db.dropcolumn(1) GRASS GIS User's Manual db.dropcolumn(1)

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

database, attribute table

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

-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

table=name [required]

Name of attribute table
column=name [required]

Name of attribute column

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.

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.

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

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

Markus Neteler

Available at: db.dropcolumn source code (history)

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© 2003-2021 GRASS Development Team, GRASS GIS 7.8.6 Reference Manual

GRASS 7.8.6

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