db.dropcolumn(1grass) GRASS GIS User's Manual db.dropcolumn(1grass)
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 ac-
tion 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 in-
terface
AUTHOR
Markus Neteler
SOURCE CODE
Available at: db.dropcolumn source code (history)
Accessed: unknown
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GRASS 7.8.7 db.dropcolumn(1grass)
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