join

JOIN(1)                               FSF                              JOIN(1)



NAME
       join - join lines of two files on a common field

SYNOPSIS
       join [OPTION]... FILE1 FILE2

DESCRIPTION
       For  each  pair of input lines with identical join fields, write a line
       to standard output.  The default join field is the first, delimited  by
       whitespace.   When FILE1 or FILE2 (not both) is -, read standard input.

       -a SIDE
              print unpairable lines coming from file SIDE

       -e EMPTY
              replace missing input fields with EMPTY

       -i, --ignore-case ignore differences in case when comparing fields

       -j FIELD
              (obsolescent) equivalent to `-1 FIELD -2 FIELD'

       -j1 FIELD
              (obsolescent) equivalent to `-1 FIELD'

       -j2 FIELD
              (obsolescent) equivalent to `-2 FIELD'

       -o FORMAT
              obey FORMAT while constructing output line

       -t CHAR
              use CHAR as input and output field separator

       -v SIDE
              like -a SIDE, but suppress joined output lines

       -1 FIELD
              join on this FIELD of file 1

       -2 FIELD
              join on this FIELD of file 2

       --help display this help and exit

       --version
              output version information and exit

       Unless -t CHAR  is  given,  leading  blanks  separate  fields  and  are
       ignored,  else fields are separated by CHAR.  Any FIELD is a field num-
       ber counted from 1.  FORMAT is one or more  comma  or  blank  separated
       specifications, each being `SIDE.FIELD' or `0'.  Default FORMAT outputs
       the join field, the remaining fields from FILE1, the  remaining  fields
       from FILE2, all separated by CHAR.

AUTHOR
       Written by Mike Haertel.

REPORTING BUGS
       Report bugs to <bug-coreutils@gnu.org>.

COPYRIGHT
       Copyright (C) 2002 Free Software Foundation, Inc.
       This is free software; see the source for copying conditions.  There is
       NO warranty; not even for MERCHANTABILITY or FITNESS FOR  A  PARTICULAR
       PURPOSE.

SEE ALSO
       The  full documentation for join is maintained as a Texinfo manual.  If
       the info and join programs are properly installed  at  your  site,  the
       command

              info join

       should give you access to the complete manual.



join (coreutils) 4.5.3           October 2003                          JOIN(1)