1db.dropcolumn(1)              Grass User's Manual             db.dropcolumn(1)
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NAME

6       db.dropcolumn  - Drops a column from selected attribute table.
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KEYWORDS

9       database, attribute table
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SYNOPSIS

12       db.dropcolumn
13       db.dropcolumn --help
14       db.dropcolumn   [-f]   table=name  column=name   [--help]   [--verbose]
15       [--quiet]  [--ui]
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17   Flags:
18       -f
19           Force removal (required for actual deletion of files)
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21       --help
22           Print usage summary
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24       --verbose
25           Verbose module output
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27       --quiet
28           Quiet module output
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30       --ui
31           Force launching GUI dialog
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33   Parameters:
34       table=name [required]
35           Name of attribute table
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37       column=name [required]
38           Name of attribute column
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DESCRIPTION

41       db.dropcolumn drops a column from an attribute table.  If the -f  force
42       flag  is  not  given  then nothing is removed, instead a preview of the
43       action to be taken is printed.
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NOTES

46       db.dropcolumn is a front-end to db.execute to allow easier usage with a
47       special  workaround  for  the SQLite driver to support column drop also
48       for SQLite tables.
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EXAMPLE

51       Dropping a column (North Carolina sample dataset):
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53       # work on own copy
54       g.copy vect=roadsmajor,myroads
55       db.describe -c myroads
56       # only shows what would happen:
57       db.dropcolumn myroads column=SHAPE_LEN
58       # actually drops the column
59       db.dropcolumn -f myroads column=SHAPE_LEN
60       db.describe -c myroads
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SEE ALSO

63        db.describe,  db.droptable,  db.execute,  v.db.dropcolumn,  GRASS  SQL
64       interface
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AUTHOR

67       Markus Neteler
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69       Last changed: $Date: 2011-11-08 22:24:20 +0100 (Tue, 08 Nov 2011) $
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SOURCE CODE

72       Available at: db.dropcolumn source code (history)
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74       Main index | Database index | Topics index | Keywords index | Graphical
75       index | Full index
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77       © 2003-2019 GRASS Development Team, GRASS GIS 7.4.4 Reference Manual
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81GRASS 7.4.4                                                   db.dropcolumn(1)