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join - Unix, Linux Command
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.
Tag | Description |
-a FILENUM
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print unpairable lines coming from file FILENUM, where
FILENUM is 1 or 2, corresponding to FILE1 or FILE2
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-e EMPTY
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replace missing input fields with EMPTY
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-i, --ignore-case ignore differences in case when comparing fields
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-j FIELD
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equivalent to -1 FIELD -2 FIELD
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-o FORMAT
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obey FORMAT while constructing output line
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-t CHAR
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use CHAR as input and output field separator
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-v FILENUM
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like -a FILENUM, but suppress joined output lines
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-1 FIELD
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join on this FIELD of file 1
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-2 FIELD
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join on this FIELD of file 2
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--help
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display this help and exit
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--version
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output version information and exit
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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 © 2006 Free Software Foundation, Inc.
This is free software. You may redistribute copies of it under the terms of
the GNU General Public License <http://www.gnu.org/licenses/gpl.html>.
There is NO WARRANTY, to the extent permitted by law.
SEE ALSO
join is maintained as a Texinfo manual. If the
info and
join programs are properly installed at your site, the command
should give you access to the complete manual.
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