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db.dropcolumngrass - Online in the Cloud

Run db.dropcolumngrass in OnWorks free hosting provider over Ubuntu Online, Fedora Online, Windows online emulator or MAC OS online emulator

This is the command db.dropcolumngrass that can be run in the OnWorks free hosting provider using one of our multiple free online workstations such as Ubuntu Online, Fedora Online, Windows online emulator or MAC OS online emulator

PROGRAM:

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

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