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Note: This addon document is for an older version of GRASS GIS that will be discontinued soon. You should upgrade your GRASS GIS installation, and read the current addon manual page.

NAME

db.join - Joins a database table to another database table.

KEYWORDS

database, attribute table

SYNOPSIS

db.join
db.join --help
db.join table=name column=name [database=name] [driver=name] other_table=name other_column=name [subset_columns=name[,name,...]] [--help] [--verbose] [--quiet] [--ui]

Flags:

--help
Print usage summary
--verbose
Verbose module output
--quiet
Quiet module output
--ui
Force launching GUI dialog

Parameters:

table=name [required]
Table to which to join other table
column=name [required]
Identifier column (e.g.: cat) in the table to be used for join
database=name
Name of database
driver=name
Name of database driver
Options: dbf, odbc, ogr, sqlite, pg
other_table=name [required]
Other table name
other_column=name [required]
Identifier column (e.g.: id) in the other table used for join
subset_columns=name[,name,...]
Subset of columns from the other table

Table of contents

DESCRIPTION

db.join joins the content of one attribute table into another attribute table through common attributes.

NOTES

db.join is a front-end to db.execute to allow easier usage. The attribute table must be stored in a SQL database (SQLite, PostgreSQL, MySQL, ODBC, ...). The DBF backend is not supported. Tables can be imported with db.in.ogr.

EXAMPLES

# join soils_legend into mysoils attribute table
db.join mysoils col=label otable=soils_legend ocol=shortname

# verification of join
db.select mysoils
cat|label|id|shortname|longname
1|Aab|||
2|Ba|2|Ba|Barnum silt loam
3|Bb|3|Bb|Barnum silt loam, channeled
4|BcB|4|BcB|Boneek silt loam, 2 to 6
5|BcC|5|BcC|Boneek silt loam, 6 to 9
...

SEE ALSO

db.execute, db.in.ogr, db.select, v.db.join, v.db.update
GRASS SQL interface

AUTHOR

Markus Neteler

SOURCE CODE

Available at: db.join source code (history)

Latest change: Mon Jun 28 07:54:09 2021 in commit: 1cfc0af029a35a5d6c7dae5ca7204d0eb85dbc55


Note: This addon document is for an older version of GRASS GIS that will be discontinued soon. You should upgrade your GRASS GIS installation, and read the current addon manual page.

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