This input file is worse than any of you seem to have imagined. This file uses <space> as the field separator and uses <space> as the contents of an "empty" field. Since the field separator is also field contents in some cases, there is no obvious way to specify an ERE that matches just the field separators. The following awk script converts the spaces that are data to the string "NULL" and leaves the spaces that are separators alone. It seem to do what was requested. (Note that the 2nd printf statement just shows how the input is modified along with the desired output. Remove it to just get the desired output.)
This User Gave Thanks to Don Cragun For This Post:
Hi guys,
I need help in extracting one column of numbers from two different files and display it in a output file. In specific, I want to extrac the column no.2 ($2) from each file, file1.txt, file2.txt. Then place both extracted columns in a one file, out.txt.
the line command I use to... (7 Replies)
Hi
I have a log file which has outputs like the one below
conn=24,196 op=1 RESULT err=0 tag=0 nentries=9 etime=3,712 dbtime=0 mem=486,183,328/2,147,483,648
Now most of the time I am only interested in the time ( the first column) and a column that begins with etime i.e... (8 Replies)
Hello,
I have 2 columns (1st column has multiple entries but the corresponding values in the column 2 may be the same or different.) however I want to extract unique values for each entry in column 1 by assigning the max value from column 2
SDF4 -0.211654
SDF4 0.978068
... (1 Reply)
Hi ,
I need to extract data from below mentioned data, having no delimiter and havin no fixed column length.
For example:
Member nbr Ref no date
10000 1000 10202012
200000 2000 11202012
Output:
to update DB with memeber nbr on basis of ref no.
... (6 Replies)
I have tried the following to no avail.
xargs -n8 < test.txt
awk '{if(NR%6!=0){p=""}else{p="\n"};printf $0" "p}' Mod_Alm_log.txt > test.txt
I have tried different variations of the above, the problem is mixes lines together.
And it includes the tags "%a and %A" I need them to be all tab... (16 Replies)
Hi,
My input files is like this
axis1 0 1 10
axis2 0 1 5
axis1 1 2 -4
axis2 2 3 -3
axis1 3 4 5
axis2 3 4 -1
axis1 4 5 -6
axis2 4 5 1
Now, these are my following tasks
1. Print a first column for every two rows that has the same value followed by a string.
2. Match on the... (3 Replies)
I am having trouble extracting the value in the columns declared in a variable. I have tried several different variation of awk but both give me the column number and not the actual value of that column.
Any suggestions?
Neither of the "extract" variables below are performing as desired
... (5 Replies)
hi i have sample data
a,b,c,d,e,g h http://mysite.xyx
z,b,d,f,e,s t http://123124#
a,b,c,i,m,nothing
d,i,j,e,w,nothing
output expected is
a,b,c,d,e,http://mysite.xyx
z,b,d,f,e,http://123124#
a,b,c,i,m,nothing
d,i,j,e,w,nothing
i can get only links using grep -o 'http.*'
i... (8 Replies)
I have a csv which has lot of columns . I was looking for an awk script which would extract a column twice. for the first occurance the header and data needs to be intact but for the second occurance i want to replace the header name since it a duplicate and extract year value which is in ddmmyy... (10 Replies)
Discussion started by: Kunalcurious
10 Replies
LEARN ABOUT FREEBSD
join
JOIN(1) BSD General Commands Manual JOIN(1)NAME
join -- relational database operator
SYNOPSIS
join [-a file_number | -v file_number] [-e string] [-o list] [-t char] [-1 field] [-2 field] file1 file2
DESCRIPTION
The join utility performs an ``equality join'' on the specified files and writes the result to the standard output. The ``join field'' is
the field in each file by which the files are compared. The first field in each line is used by default. There is one line in the output
for each pair of lines in file1 and file2 which have identical join fields. Each output line consists of the join field, the remaining
fields from file1 and then the remaining fields from file2.
The default field separators are tab and space characters. In this case, multiple tabs and spaces count as a single field separator, and
leading tabs and spaces are ignored. The default output field separator is a single space character.
Many of the options use file and field numbers. Both file numbers and field numbers are 1 based, i.e., the first file on the command line is
file number 1 and the first field is field number 1. The following options are available:
-a file_number
In addition to the default output, produce a line for each unpairable line in file file_number.
-e string
Replace empty output fields with string.
-o list
The -o option specifies the fields that will be output from each file for each line with matching join fields. Each element of list
has either the form file_number.field, where file_number is a file number and field is a field number, or the form '0' (zero), repre-
senting the join field. The elements of list must be either comma (',') or whitespace separated. (The latter requires quoting to
protect it from the shell, or, a simpler approach is to use multiple -o options.)
-t char
Use character char as a field delimiter for both input and output. Every occurrence of char in a line is significant.
-v file_number
Do not display the default output, but display a line for each unpairable line in file file_number. The options -v 1 and -v 2 may be
specified at the same time.
-1 field
Join on the field'th field of file1.
-2 field
Join on the field'th field of file2.
When the default field delimiter characters are used, the files to be joined should be ordered in the collating sequence of sort(1), using
the -b option, on the fields on which they are to be joined, otherwise join may not report all field matches. When the field delimiter char-
acters are specified by the -t option, the collating sequence should be the same as sort(1) without the -b option.
If one of the arguments file1 or file2 is '-', the standard input is used.
EXIT STATUS
The join utility exits 0 on success, and >0 if an error occurs.
COMPATIBILITY
For compatibility with historic versions of join, the following options are available:
-a In addition to the default output, produce a line for each unpairable line in both file1 and file2.
-j1 field
Join on the field'th field of file1.
-j2 field
Join on the field'th field of file2.
-j field
Join on the field'th field of both file1 and file2.
-o list ...
Historical implementations of join permitted multiple arguments to the -o option. These arguments were of the form
file_number.field_number as described for the current -o option. This has obvious difficulties in the presence of files named 1.2.
These options are available only so historic shell scripts do not require modification and should not be used.
SEE ALSO awk(1), comm(1), paste(1), sort(1), uniq(1)STANDARDS
The join command conforms to IEEE Std 1003.1-2001 (``POSIX.1'').
BSD July 5, 2004 BSD