1v.db.dropcolumn(1)          GRASS GIS User's Manual         v.db.dropcolumn(1)
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NAME

6       v.db.dropcolumn  - Drops a column from the attribute table connected to
7       a given vector map.
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KEYWORDS

10       vector, attribute table, database
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SYNOPSIS

13       v.db.dropcolumn
14       v.db.dropcolumn --help
15       v.db.dropcolumn   map=name    [layer=string]    columns=name[,name,...]
16       [--help]  [--verbose]  [--quiet]  [--ui]
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18   Flags:
19       --help
20           Print usage summary
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22       --verbose
23           Verbose module output
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25       --quiet
26           Quiet module output
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28       --ui
29           Force launching GUI dialog
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31   Parameters:
32       map=name [required]
33           Name of vector map
34           Or data source for direct OGR access
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36       layer=string
37           Layer number or name
38           Vector  features can have category values in different layers. This
39           number determines which layer to use. When used with direct OGR ac‐
40           cess this is the layer name.
41           Default: 1
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43       columns=name[,name,...] [required]
44           Name of attribute column(s) to drop
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DESCRIPTION

47       v.db.dropcolumn  drops a column from the attribute table connected to a
48       given vector map. It automatically checks the connection for the speci‐
49       fied  layer.  v.db.dropcolumn omits to delete the ’cat’ column which is
50       relevant to keep the connection between vector map and table.
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NOTES

53       v.db.dropcolumn is a front-end to db.execute to allow easier usage.
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55       The existing database connection(s) can be verified with v.db.connect.
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EXAMPLES

58       Dropping a column:
59       g.copy vect=roadsmajor,myroads
60       v.info -c myroads
61       v.db.dropcolumn myroads column=SHAPE_LEN
62       v.info -c myroads
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SEE ALSO

65        db.connect, db.dropcolumn, db.execute,  v.db.addcolumn,  v.db.connect,
66       v.db.droptable, v.db.select, v.db.update
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68        GRASS SQL interface
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AUTHOR

71       Markus Neteler
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SOURCE CODE

74       Available at: v.db.dropcolumn source code (history)
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76       Accessed: Saturday Jan 21 20:41:02 2023
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78       Main  index  | Vector index | Topics index | Keywords index | Graphical
79       index | Full index
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81       © 2003-2023 GRASS Development Team, GRASS GIS 8.2.1 Reference Manual
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85GRASS 8.2.1                                                 v.db.dropcolumn(1)