AT&T UNIX™PC Unix System V Users Manual - tenox

AT&T UNIX™PC Unix System V Users Manual - tenox AT&T UNIX™PC Unix System V Users Manual - tenox

01.01.2013 Views

IPCS ( 1) IPCS ( 1 ) BUGS Things can change while ipcs is running; the picture it gives is only a close approximation to reality. - 4- ·� /

JOIN ( 1 ) JOIN ( 1 ) NAME join - relational database operator SYNOPSIS join [ options ] filel file2 DESCRIPTION Join forms, on the standard output, a join of the two relations specified by the lines of file1 and file2. If file1 is -, the standard input is used. File1 and file2 must be sorted in increasing ASCII collating sequence on the fields on which they are to be joined, normally the first in each line. There is one line in the output for each pair of lines in file1 and file2 that have identical join fields. The output line normally consists of the common field, then the rest of the line from file1 , then the rest of the line from file2. Fields are normally separated by blank, tab or new-line. In this case, multiple separators count as one, and leading separators are discarded. These options are recognized: -an In addition to the normal output, produce a line for each unpairable line in file n, where n is 1 or 2. -e s Replace empty output fields by string s. -j n m Join on the m th field of file n. If n is missing, use the m th field in each file. -o list Each output line comprises the fields specified in list, each element of which has the form n.m, where n is a file number and m is a field number. -tc Use character c as a separator (tab character). Every appearance of c in a line is significant. SEE ALSO awk( l), comm(l), sort(l). BUGS With default field separation, the collating sequence is that of sort -b; with -t, the sequence is that of a plain sort. The conventions of join, sort, comm, uniq and awk(l) are wildly incongruous. - 1 -

IPCS ( 1) IPCS ( 1 )<br />

BUGS<br />

Things can change while ipcs is running; the picture it gives is<br />

only a close approximation to reality.<br />

- 4-<br />

·� /

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