Your description and code are not clear enough to be sure that this is what you want, but it works with the sample data provided:
Clearly field #2 is not the key to determining duplicate records, it is at least field #2 when and only when field #1 is "D". And, since you are storing the entire line into the a[] array for some reason, maybe you only want to delete identical lines instead of deleting lines with identical keys???
The above code assumes you just want to delete lines with identical keys where the key is the combination of field #1 being "D" and field #2 being unique. The second field in the line with field #1 being "T" is written with whatever was in field #2 changed to the number of lines with field #1 being "D" and field #2 being unique that have been seen before the line that has field #1 being "T". All lines that do not have field #1 being "D" or "T" are copied to the output without being counted.
You should always tell us what operating system and shell you're using when you start a new thread in this forum. The behavior of many utilities varies from operating system to operating system and the features provided by shells vary from shell to shell.
If you want to try the above code on a Solaris/SunOS system, change awk to /usr/xpg4/bin/awk or nawk.
This User Gave Thanks to Don Cragun For This Post:
Hi,
If i have a file with xml format, i would like to remove duplicated records and save to a new file. Is it possible...to write script to do it? (8 Replies)
hi all,
i have a file contain multicolumns, this file is sorted by col2 and col3.
i want to remove the duplicated columns if the col2 and col3 are the same in another line.
example
fileA
AA BB CC DD
CC XX CC DD
BB CC ZZ FF
DD FF HH HH
the output is
AA BB CC DD
BB CC ZZ FF... (6 Replies)
Hi,
I need help with a maybe total simple issue but somehow I am not getting it.
I am not able to etablish a sed or awk command which is adding to the first line in a text and removing only from the last line the ",".
The file is looking like follow:
TABLE1,
TABLE2,
.
.
.
TABLE99,... (4 Replies)
I am trying to load data into 3 tables simultaneously (which is working fine). Then when loaded, it should count the total number of records in all the 3 input files and send an e-mail to the user.
The script is working fine, as far as loading all the 3 input files into the database tables, but... (3 Replies)
Hi Gurus,
I need to cut single record in the file(asdf) to multile records based on the number of bytes..(44 characters). So every record will have 44 characters. All the records should be in the same file..to each of these lines I need to add the folder(<date>) name.
I have a dir. in which... (20 Replies)
HI ,
I am having a huge comma delimiter file, I have to append the following four lines before the starting of the file through a shell script.
FILE NAME = TEST_LOAD
DATETIME = CURRENT DATE TIME
LOAD DATE = CURRENT DATE
RECORD COUNT = TOTAL RECORDS IN FILE
Source data
1,2,3,4,5,6,7... (7 Replies)
Hi,
I need help regarding below concern.
There is a script and it has 7 existing files(in a path say,. usr/appl/temp/file1.txt) and I need to create one new blank file say “file_count.txt” in the same script itself.
Then the new file <file_count.txt> should store all the 7 filenames and... (1 Reply)
I have a file, in which a single record spans across multiple lines,
File 1
====
14|\n
leave request \n
accepted|Yes|
15|\n
leave request not \n
acccepted|No|
I wanted to remove the '\n charecters. I used the below code (foudn somewhere in this forum)
perl -e 'while (<>) { if... (1 Reply)
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 the either the form 'file_number.field', where file_number is a file number and field is a field number, or the form '0' (zero),
representing 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 file 1.
-2 field
Join on the field'th field of file 2.
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 file 1 and file 2.
-j1 field
Join on the field'th field of file 1.
-j2 field
Join on the field'th field of file 2.
-j field
Join on the field'th field of both file 1 and file 2.
-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. They should not be used in new code.
LEGACY DESCRIPTION
The -e option causes a specified string to be substituted into empty fields, even if they are in the middle of a line. In legacy mode, the
substitution only takes place at the end of a line.
Only documented options are allowed. In legacy mode, some obsolete options are re-written into current options.
For more information about legacy mode, see compat(5).
SEE ALSO awk(1), comm(1), paste(1), sort(1), uniq(1), compat(5)STANDARDS
The join command conforms to IEEE Std 1003.1-2001 (``POSIX.1'').
BSD July 5, 2004 BSD