I want to merge these but only include duplicated fields from the second file. So the result is
Basically merging 2 files but omitting any records in file 1 which appear in file2 based on the key field.
I've started to cobble a script together which
makes a list of key fields from file2
loops round reading that file and uses grep -v to remove records with that key from file1
then use uniq -d to only keep records which were duplicated (so I now have copy of file1 but with noly records 1,2,4,6,7)
then concatenate this file and file2
This only if file2 has exactly 2 records.
This feels like something which should be simple but I can't figure it out. I suspect I should be able to use join or maybe awk to achieve what i want but I can't get there & can't find anything through Google.
Can anyone suggest a more elegant solution to my approach? (& frankly one which works because mine doesn't)
Hi
Fields in Files 1,2,3,4 are pipe"|" separated.
Say I want to grep
col1 from File1
col3 from File2
col4 from File3
and print to File4 in the following order:
col3|col1|col4
what is the best way of doing this?
Thanks (2 Replies)
I want to loop through files in a directory but omit the file with the latest date in my list of files. How would I accomplish this?
Thanks (2 Replies)
Hi all,
I want to copy a directory named Ec1 to another directory named Ec2, newly created. But Ec1 has a bunch of *.dat files and many many other kinds of files. Whle creating Ec2, I selectively want to omit the *.dat files since they are huge files of the order of 100 MBs and there are... (5 Replies)
Hi All I am writting a script that does a comparison between files in 2 diffectent directories.
To do this I need a command that will list out only the files in a give directory and omit any sub dorectories with that directory. But I am unable to find it.
Please Help.
I tried
ls... (5 Replies)
Hello All,
I am writting file comparison Utility and I have encountered such a senario where there are 2 files such as follows-
1#!/usr/local/bin/python
2 import gsd.scripts.admin.control.gsdPageEscalate
3.gsd.scripts.admin.control.gsdPageEscalate.main()
1 #!/usr/local/bin/python... (10 Replies)
Hello,
My apologies if this has been posted elsewhere, I have had a look at several threads but I am still confused how to use these functions. I have two files, each with 5 columns:
File A: (tab-delimited)
PDB CHAIN Start End Fragment
1avq A 171 176 awyfan
1avq A 172 177 wyfany
1c7k A 2 7... (3 Replies)
Hi,
I have 20 tab delimited text files that have a common column (column 1). The files are named GSM1.txt through GSM20.txt. Each file has 3 columns (2 other columns in addition to the first common column).
I want to write a script to join the files by the first common column so that in the... (5 Replies)
Hi,
I want to display the file names and the record count for the files in the 2nd column for the files created today.
i have written the below command which is listing the file names. but while piping the above command to the wc -l command
its not working for me.
ls -l... (5 Replies)
i made a script on my own. this is for the inventory to all of my AWS servers, and i run it to all of my servers to get the hostname, please look at file2. Then i need some data in file3 as well,. i need to combine them
#cat file1
192.10.1.41
server.age.com
######
192.10.0.40
ssh cant... (10 Replies)
Hi Gurus,
I need to remove duplicate line in file and update TRAILER (last line) record count. the file is comma delimited, field 2 is key to identify duplicated record.
I can use below command to remove duplicated. but don't know how to replace last line 2nd field to new count.
awk -F","... (11 Replies)
Discussion started by: green_k
11 Replies
LEARN ABOUT MINIX
join
JOIN(1) General Commands Manual JOIN(1)NAME
join - relational database operator
SYNOPSIS
join [-an] [-e s] [-o list] [-tc] file1 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 con-
sists 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 newline. In this case, multiple separators count as one, and leading separators are dis-
carded.
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.
-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 sort(1), comm(1), awk(1).
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, look and awk(1) are wildly incongruous.
7th Edition April 29, 1985 JOIN(1)