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- JOIN(1L) JOIN(1L)
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-
- NAME
- join - join lines of two files on a common field
-
- SYNOPSIS
- join [-a 1|2] [-v 1|2] [-e empty-string] [-o field-
- list...] [-t char] [-j[1|2] field] [-1 field] [-2 field]
- [--help] [--version] file1 file2
-
- DESCRIPTION
- This manual page documents the GNU version of join. join
- prints to the standard output a line for each pair of
- input lines, one each from file1 and file2, that have
- identical join fields. Either filename (but not both) can
- be `-', meaning the standard input. file1 and file2
- should be already sorted in increasing order (not numeri-
- cally) on the join fields; unless the -t option is given,
- they should be sorted ignoring blanks at the start of the
- line, as sort does when given the -b option.
-
- The defaults are: the join field is the first field in
- each line; fields in the input are separated by one or
- more blanks, with leading blanks on the line ignored;
- fields in the output are separated by a space; each output
- line consists of the join field, the remaining fields from
- file1, then the remaining fields from file2.
-
- OPTIONS
- -a file-number
- Print a line for each unpairable line in file file-
- number (either 1 or 2), in addition to the normal
- output.
-
- -e string
- Replace empty output fields (those that are missing
- in the input) with string.
-
- -1, -j1 field
- Join on field field (a positive integer) of file 1.
-
- -2, -j2 field
- Join on field field (a positive integer) of file 2.
-
- -j field
- Equivalent to -1 field -2 field.
-
- -o field-list...
- Construct each output line according to the format
- in field-list. Each element in field-list consists
- of a file number (either 1 or 2), a period, and a
- field number (a positive integer). The elements in
- the list are separated by commas or blanks. Multi-
- ple field-list arguments can be given after a sin-
- gle -o option; the values of all lists given with
- -o are concatenated together.
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-
-
- FSF GNU Text Utilities 1
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- JOIN(1L) JOIN(1L)
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- -t char
- Use character char as the input and output field
- separator.
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- -v file-number
- Print a line for each unpairable line in file file-
- number (either 1 or 2), instead of the normal out-
- put.
-
- --help Print a usage message and exit with a non-zero sta-
- tus.
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- --version
- Print version information on standard error then
- exit.
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- FSF GNU Text Utilities 2
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