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