JOINSection: User Commands (1)
Updated: June 2012
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NAMEjoin - join lines of two files on a common field
SYNOPSISjoin [OPTION]... FILE1 FILE2
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 comparing 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
- check that the input is correctly sorted, even if all input lines are pairable
- do not check that the input is correctly sorted
- display this help and exit
- 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. E.g., use `sort -k 1b,1' if `join' has no options. Note, comparisons honor the rules specified by `LC_COLLATE'. If the input is not sorted and some lines cannot be joined, a warning message will be given.
AUTHORWritten by Mike Haertel.
REPORTING BUGSReport join bugs to email@example.com
GNU coreutils home page: <http://www.gnu.org/software/coreutils/>
General help using GNU software: <http://www.gnu.org/gethelp/>
Report join translation bugs to <http://translationproject.org/team/>
COPYRIGHTCopyright © 2010 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>.
This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law.
SEE ALSOcomm(1), uniq(1)
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 coreutils aqjoin invocationaq
should give you access to the complete manual.
This document was created by man2html, using the manual pages.
Time: 05:29:05 GMT, December 24, 2015