db.describe.1grass man page

db.describe — Describes a table in detail.

Keywords

database, attribute table

Synopsis

db.describe
db.describe --help
db.describe [-ct] table=name [driver=name] [database=name] [--help] [--verbose] [--quiet] [--ui]

Flags

-c
Print column names only instead of full column descriptions
-t
Print table structure
--help
Print usage summary
--verbose
Verbose module output
--quiet
Quiet module output
--ui
Force launching GUI dialog

Parameters

table=name [required]
Name of attribute table
driver=name
Name of database driver
Options: mesql, pg, dbf, sqlite, odbc, ogr, mysql
Default: sqlite
database=name
Name of database
Default: $GISDBASE/$LOCATION_NAME/$MAPSET/sqlite/sqlite.db

Description

db.describe displays table information. If parameter -c is used only column names instead of full column descriptions is given.

Note

If parameters for database connection are already set with db.connect, they are taken as default values and do not need to be spcified each time.

Examples

List column descriptions of table in SQLite database (note that this is the default setting)

db.describe driver=sqlite table=hospitals \
   database=’$GISDBASE/$LOCATION_NAME/$MAPSET/sqlite/sqlite.db’
# or simply
db.describe myarchsites

DBF example

db.describe -c table=hospitals database=’$GISDBASE/$LOCATION_NAME/PERMANENT/dbf/’ \
            driver=dbf
ncols: 16
nrows: 160
Column 1: cat:INTEGER:11
Column 2: OBJECTID:INTEGER:11
Column 3: AREA:DOUBLE PRECISION:20
[...]
db.describe table=hospitals database=’$GISDBASE/$LOCATION_NAME/PERMANENT/dbf/’ \
            driver=dbf
table:hospitals
description:
insert:yes
delete:yes
ncols:16
nrows:160
column:cat
description:
type:INTEGER
len:11
scale:0
precision:10
default:
nullok:yes
select:yes
update:yes
column:OBJECTID
description:
type:INTEGER
[...]

See Also

db.columns, db.droptable, db.execute, db.login, db.tables, GRASS SQL interface

Author

Radim Blazek, ITC-Irst, Trento, Italy

Last changed: $Date: 2014-11-28 10:58:18 +0100 (Fri, 28 Nov 2014) $

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