
NAME
v.db.addcol - Adds one or more columns to the attribute table connected to a given vector map.
KEYWORDS
vector, database, attribute table
SYNOPSIS
v.db.addcol
v.db.addcol help
v.db.addcol map=name [layer=integer] columns=string [--verbose] [--quiet]
Parameters:
- map=name
- Vector map for which to edit attribute table
- layer=integer
- Layer where to add column
- Default: 1
- columns=string
- Name and type of the new column(s) (types depend on database backend, but all support VARCHAR(), INT, DOUBLE PRECISION and DATE)
DESCRIPTION
v.db.addcol 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.addcol 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 default
dbf backend supports only these types.
The existing database connection(s) can be verified with v.db.connect.
EXAMPLES
Adding a single column:
v.db.addcol sentiero_brenta_points columns="slope double precision"
v.info -c sentiero_brenta_points
Adding two columns:
v.db.addcol sentiero_brenta_points columns="slope double precision,myname varchar(15)"
v.info -c sentiero_brenta_points
SEE ALSO
db.execute,
v.db.addtable,
v.db.connect,
v.db.dropcol,
v.db.droptable,
v.db.select,
v.db.update
AUTHOR
Moritz Lennert (mlennert@club.worldonline.be)
Last changed: $Date: 2008-06-30 22:27:15 +0200 (Mon, 30 Jun 2008) $
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