join(1) - phpMan

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JOIN(1)                          User Commands                         JOIN(1)

       join - join lines of two files on a common field

       join [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

              do not check that the input is correctly sorted

       --help 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 warn-
       ing message will be given.

       Written by Mike Haertel.

       Report join bugs to bug-coreutils AT
       GNU coreutils home page: <>
       General help using GNU software: <>
       Report join translation bugs to <>

       Copyright (C) 2010 Free Software Foundation, Inc.  License GPLv3+: GNU GPL version  3
       or later <>.
       This  is  free  software:  you are free to change and redistribute it.  There is NO
       WARRANTY, to the extent permitted by law.

       comm(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 'join invocation'

       should give you access to the complete manual.

GNU coreutils 8.4                 March 2017                           JOIN(1)

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