DESCRIPTION
v.db.addcolumn adds one or more column(s) to the attribute table
connected to a given vector map. It automatically checks the connection for the
specified layer.
NOTES
v.db.addcolumn is a front-end to db.execute to allow easier usage.
The supported types of columns depend on the database backend. However, all
backends should support VARCHAR, INT, DOUBLE PRECISION and DATE.
The existing database connection(s) can be verified with v.db.connect.
EXAMPLES
Adding a single column:
g.copy vect=roadsmajor,myroads
v.db.addcolumn myroads columns="slope double precision"
v.info -c myroads
Adding two columns:
g.copy vect=roadsmajor,myroads
v.db.addcolumn myroads columns="slope double precision,myname varchar(15)"
v.info -c myroads
SEE ALSO
db.connect,
db.execute,
v.db.addtable,
v.db.connect,
v.db.dropcolumn,
v.db.droptable,
v.db.select,
v.db.update
GRASS SQL interface
AUTHOR
Moritz Lennert (mlennert@club.worldonline.be)
Last changed: $Date$