Data Processing Utility

What is D?

D is a tool for data processing. It is a series of command line interface commands that perform file operations such as selection, projection, sort, join, bundling and unbundling, on D-files.


Some frequently used D commands

DselectSelection by a conditional expression
DprojProjection
DsortSorting by key values
DjoinJoin/matching of D-files by key values
DbundleVertical merge of D-records by key values
DunbundleSlicing D-records with a repeating group

Version history of D

VersionDatePlatforms
Version 2.5Jul 10, 2008Windows, Unix/Linux/Mac OS X
Version 2.4Nov 22, 2007Windows, Unix/Linux/Mac OS X
Version 2.3Mar 29, 2007Windows, Unix
Version 2.2Nov 11, 2004Windows, Solaris, SunOS4, Linux
Version 2.1Jun 2, 2004Windows, Solaris, SunOS4, Linux
Version 2.0Jul 3, 2003WIndows, Solaris, SunOS4
Version 1Unpublished 1993SunOS