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JOIN(1) User Commands 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 FILENUM
print unpairable lines coming from file FILENUM,
where FILENUM is 1 or 2, corresponding to FILE1
or FILE2
-e EMPTY
replace missing input fields with EMPTY
-i, --ignore-case ignore differences in case when com-
paring fields
-j FIELD
equivalent to `-1 FIELD -2 FIELD'
-o FORMAT
obey FORMAT while constructing output line
-t CHAR
use CHAR as input and output field separator
-v FILENUM
like -a FILENUM, 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 number counted from 1. FORMAT is one
or more comma or blank separated specifications, each
being `FILENUM.FIELD' or `0'. Default FORMAT outputs
the join field, the remaining fields from FILE1, the
remaining fields from FILE2, all separated by CHAR.
Important: FILE1 and FILE2 must be sorted on the join
fields.
AUTHOR
Written by Mike Haertel.
REPORTING BUGS
Report bugs to <bug-coreutils@gnu.org>.
COPYRIGHT
Copyright (C) 2004 Free Software Foundation, Inc.
This is free software; see the source for copying condi-
tions. There is NO warranty; not even for MERCHANTABIL-
ITY or FITNESS FOR A PARTICULAR PURPOSE.
SEE ALSO
The full documentation for join is maintained as a Tex-
info 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 5.3.0 December 2004 JOIN(1)
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