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db.dropcol.1grass
Langue: en
Version: 335047 (ubuntu - 24/10/10)
Section: 1 (Commandes utilisateur)
NAME
db.dropcol - Drops a column from selected attribute tableKEYWORDS
database, attribute tableSYNOPSIS
db.dropcoldb.dropcol help
db.dropcol [-f] table=name column=string [--verbose] [--quiet]
Flags:
- -f
Force removal (required for actual deletion of files)- --verbose
Verbose module output- --quiet
Quiet module output
Parameters:
- table=name
Table from which to drop attribute column- column=string
Name of the column
DESCRIPTION
db.dropcol 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.dropcol is a front-end to db.execute to allow easier usage with a special workaround for the SQLite driver to support column drop.EXAMPLES
Dropping a column (Spearfish):
# work on own copy
g.copy vect=roads,myroads
db.describe -c myroads
# only shows what would happen:
db.dropcol myroads column=label
# actually drops the column
db.dropcol -f myroads column=label
db.describe -c myroads
SEE ALSO
db.droptable, db.execute, v.db.dropcolAUTHOR
Markus NetelerLast changed: $Date: 2007-12-30 12:48:58 +0100 (dom, 30 dic 2007) $
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