Free Knowledge Resources


Linux Manual Pages


Free Software * Books

Source Code

Free Media

Linux

db.columns(1grass)


NAME

   db.columns  - List all columns for a given table.

KEYWORDS

   database, attribute table

SYNOPSIS

   db.columns
   db.columns --help
   db.columns   table=name    [driver=name]    [database=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]
       Name of attribute table

   driver=name
       Name of database driver
       Options: dbf, mysql, odbc, ogr, pg, sqlite
       Default: sqlite

   database=name
       Name of database
       Default: $GISDBASE/$LOCATION_NAME/$MAPSET/sqlite/sqlite.db

DESCRIPTION

   db.columns lists all columns for a give table. Connection to  databases
   are supported through dbf, shp, odbc and pg drivers.

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 columns of a PostgreSQL attribute table
   db.columns table=zipcodes_wake driver=pg database=grassdb

   If  the  database parameters are already set, the columns can be listed
   directly
   db.columns table=zipcodes_wake

   List columns from Shape file with DBF attribute table
   db.columns table=zipcodes_wake driver=dbf database=/grassdata/nc_spm_08/PERMANENT/dbf/

   List columns of table in SQLite database
   Note that the SQLite backend is the default setting.
   db.columns driver=sqlite table=archsites database='$GISDBASE/$LOCATION_NAME/$MAPSET/sqlite/sqlite.db'

SEE ALSO

     db.connect,  db.describe,   db.drivers,   db.droptable,   db.execute,
   db.login, db.tables, GRASS SQL interface

   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.columns source code (history)

   Main index | Database index | Topics index | Keywords index | Graphical
   index | Full index

    2003-2016 GRASS Development Team, GRASS GIS 7.2.0 Reference Manual



Opportunity


Personal Opportunity - Free software gives you access to billions of dollars of software at no cost. Use this software for your business, personal use or to develop a profitable skill. Access to source code provides access to a level of capabilities/information that companies protect though copyrights. Open source is a core component of the Internet and it is available to you. Leverage the billions of dollars in resources and capabilities to build a career, establish a business or change the world. The potential is endless for those who understand the opportunity.

Business Opportunity - Goldman Sachs, IBM and countless large corporations are leveraging open source to reduce costs, develop products and increase their bottom lines. Learn what these companies know about open source and how open source can give you the advantage.



Free Software


Free Software provides computer programs and capabilities at no cost but more importantly, it provides the freedom to run, edit, contribute to, and share the software. The importance of free software is a matter of access, not price. Software at no cost is a benefit but ownership rights to the software and source code is far more significant.

Free Office Software - The Libre Office suite provides top desktop productivity tools for free. This includes, a word processor, spreadsheet, presentation engine, drawing and flowcharting, database and math applications. Libre Office is available for Linux or Windows.



Free Books


The Free Books Library is a collection of thousands of the most popular public domain books in an online readable format. The collection includes great classical literature and more recent works where the U.S. copyright has expired. These books are yours to read and use without restrictions.

Source Code - Want to change a program or know how it works? Open Source provides the source code for its programs so that anyone can use, modify or learn how to write those programs themselves. Visit the GNU source code repositories to download the source.



Education


Study at Harvard, Stanford or MIT - Open edX provides free online courses from Harvard, MIT, Columbia, UC Berkeley and other top Universities. Hundreds of courses for almost all major subjects and course levels. Open edx also offers some paid courses and selected certifications.

Linux Manual Pages - A man or manual page is a form of software documentation found on Linux/Unix operating systems. Topics covered include computer programs (including library and system calls), formal standards and conventions, and even abstract concepts.


birds banner