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 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/REAL 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: 2007-02-05 06:33:02 -0800 (Mon, 05 Feb 2007) $
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