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v.db.addcol

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 15:33:02 +0100 (Mon, 05 Feb 2007) $

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