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