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db.copy(1grass) Grass User's Manual db.copy(1grass)

NAME

db.copy - Copy a table.
Either ’from_table’ (optionally with ’where’) can be used or ’select’ option, but not ’from_table’ and ’select’ at the same time.

KEYWORDS

database, attribute table, SQL

SYNOPSIS

db.copy
db.copy --help
db.copy [from_driver=name] [from_database=name] [from_table=name] [to_driver=name] [to_database=name] to_table=name [where=sql_query] [select=string] [--overwrite] [--help] [--verbose] [--quiet] [--ui]

Flags:

--overwrite

Allow output files to overwrite existing files
--help

Print usage summary
--verbose

Verbose module output
--quiet

Quiet module output
--ui

Force launching GUI dialog

Parameters:

from_driver=name

Input driver name
Options: dbf, mysql, odbc, ogr, pg, sqlite
Default: sqlite
from_database=name

Input database name
Default: $GISDBASE/$LOCATION_NAME/$MAPSET/sqlite/sqlite.db
from_table=name

Input table name (only, if ’select’ is not used)
to_driver=name

Output driver name
Options: dbf, mysql, odbc, ogr, pg, sqlite
Default: sqlite
to_database=name

Output database name
Default: $GISDBASE/$LOCATION_NAME/$MAPSET/sqlite/sqlite.db
to_table=name [required]

Output table name
where=sql_query

WHERE conditions of SQL statement without ’where’ keyword
Example: income < 1000 and inhab >= 10000
select=string

Full select statement (only, if ’from_table’ and ’where’ is not used)
E.g.: SELECT dedek FROM starobince WHERE obec = ’Frimburg’

DESCRIPTION

db.copy allows the user to copy a table between two databases. Databases can be connected through different drivers (see examples below).

NOTES

Attribute tables can be copied using db.copy and, when to be associated to a vector map, assigned to the map with v.db.connect. Current connection settings are saved in the file $LOCATION/vector_map/dbln.

EXAMPLES

From DBF to PostgreSQL

Storing table ’geonames.dbf’ (in current directory) into PostgreSQL through ODBC: 

db.copy from_driver=dbf from_database=’$GISDBASE/$LOCATION_NAME/PERMANENT/dbf’ \
  from_table=geonames to_driver=pg to_database="host=pgserver,dbname=testdb" \
  to_table=geonames

From PostgreSQL to DBF


db.copy from_driver=pg  from_database="host=pgserver.example.org,dbname=testdb" \
  from_table=origtable to_driver=dbf \
  to_database=’$GISDBASE/$LOCATION_NAME/$MAPSET/dbf’ to_table=origtable

From PostgreSQL to PostgreSQL with condition


db.copy from_driver=pg  from_database="host=localhost,dbname=testdb" \
  from_table=geonames to_driver=pg to_database="host=localhost,dbname=testdb" \
  to_table=selection where="cat < 500"

From DBF to SQLite


db.copy from_driver=dbf from_database=’$GISDBASE/$LOCATION_NAME/PERMANENT/dbf’ \
   from_table=geonames_features to_driver=sqlite \
   to_database=’$GISDBASE/$LOCATION_NAME/$MAPSET/sqlite/sqlite.db’ to_table=geonames_features
# convenient viewer:
sqlitebrowser $HOME/grassdata/nc_spm_08/user1/sqlite/sqlite.db

From SQLite to DBF


db.copy from_driver=sqlite from_database=’$GISDBASE/$LOCATION_NAME/$MAPSET/sqlite/sqlite.db’ \
   from_table=ammprv to_driver=dbf to_database=’$GISDBASE/$LOCATION_NAME/$MAPSET/dbf/’ \
   to_table=ammprv

SEE ALSO

db.connect, db.drivers, db.login, v.db.connect, v.clean

GRASS SQL interface

AUTHOR

Radim Blazek, ITC-irst, Trento, Italy

Last changed: $Date: 2014-11-28 10:57:47 +0100 (Fri, 28 Nov 2014) $

SOURCE CODE

Available at: db.copy source code (history)

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GRASS 7.2.0