1
.\" DO NOT MODIFY THIS FILE! It was generated by help2man 1.35.
2
.TH JOIN "1" "October 2012" "GNU coreutils 8.20" "User Commands"
4
join \- join lines of two files on a common field
7
[\fIOPTION\fR]... \fIFILE1 FILE2\fR
9
.\" Add any additional description here
11
For each pair of input lines with identical join fields, write a line to
12
standard output. The default join field is the first, delimited
13
by whitespace. When FILE1 or FILE2 (not both) is \-, read standard input.
16
also print unpairable lines from file FILENUM, where
17
FILENUM is 1 or 2, corresponding to FILE1 or FILE2
20
replace missing input fields with EMPTY
22
\fB\-i\fR, \fB\-\-ignore\-case\fR
23
ignore differences in case when comparing fields
26
equivalent to '\-1 FIELD \fB\-2\fR FIELD'
29
obey FORMAT while constructing output line
32
use CHAR as input and output field separator
35
like \fB\-a\fR FILENUM, but suppress joined output lines
38
join on this FIELD of file 1
41
join on this FIELD of file 2
43
\fB\-\-check\-order\fR
44
check that the input is correctly sorted, even
45
if all input lines are pairable
47
\fB\-\-nocheck\-order\fR
48
do not check that the input is correctly sorted
51
treat the first line in each file as field headers,
52
print them without trying to pair them
55
display this help and exit
58
output version information and exit
60
Unless \fB\-t\fR CHAR is given, leading blanks separate fields and are ignored,
61
else fields are separated by CHAR. Any FIELD is a field number counted
62
from 1. FORMAT is one or more comma or blank separated specifications,
63
each being 'FILENUM.FIELD' or '0'. Default FORMAT outputs the join field,
64
the remaining fields from FILE1, the remaining fields from FILE2, all
65
separated by CHAR. If FORMAT is the keyword 'auto', then the first
66
line of each file determines the number of fields output for each line.
68
Important: FILE1 and FILE2 must be sorted on the join fields.
69
E.g., use "sort \fB\-k\fR 1b,1" if 'join' has no options,
70
or use "join \fB\-t\fR ''" if 'sort' has no options.
71
Note, comparisons honor the rules specified by 'LC_COLLATE'.
72
If the input is not sorted and some lines cannot be joined, a
73
warning message will be given.
75
Written by Mike Haertel.
77
Report join bugs to bug\-coreutils@gnu.org
79
GNU coreutils home page: <http://www.gnu.org/software/coreutils/>
81
General help using GNU software: <http://www.gnu.org/gethelp/>
83
Report join translation bugs to <http://translationproject.org/team/>
85
Copyright \(co 2012 Free Software Foundation, Inc.
86
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>.
88
This is free software: you are free to change and redistribute it.
89
There is NO WARRANTY, to the extent permitted by law.
93
The full documentation for
95
is maintained as a Texinfo manual. If the
99
programs are properly installed at your site, the command
101
.B info coreutils \(aqjoin invocation\(aq
103
should give you access to the complete manual.
added
removed
man/join.1
