hii i have a huge amt of data stored in a file.Here in this file i need to remove duplicates rows in such a way that the last column has different data & i must check for greatest among last colmn data & print the largest data along with other entries but just one of other duplicate entries is... (16 Replies)
I need to delete rows based on the number of lines in a different file, I have a piece of code with me working but when I merge with my C application, it doesnt work.
sed '1,'\"`wc -l < /tmp/fileyyyy`\"'d' /tmp/fileA > /tmp/filexxxx
Can anyone give me an alternate solution for the above (2 Replies)
Hello list,
I am working on a csv file which contains two fields per record which contain IP addresses. What I am trying to do is find records which have identical fields(IP addresses) which occur 4(four) times, and if they do, delete all records with that specific identical field(ip address).
... (4 Replies)
HI all,
I have a simple challenge for you.. I have the following pipe delimited file
2345|98|1809||x|969|0
2345|98|0809||y|0|537
2345|97|9809||x|544|0
2345|97|0909||y|0|651
9685|98|7809||x|321|0
9685|98|7909||y|0|357
9685|98|7809||x|687|0
9685|98|0809||y|0|234
2315|98|0809||x|564|0
... (2 Replies)
Hi all
I have a file which looks like this
1234|1|Jon|some text|some text
1234|2|Jon|some text|some text
3453|5|Jon|some text|some text
6533|2|Kate|some text|some text
4567|3|Chris|some text|some text
4567|4|Maggie|some text|some text
8764|6|Maggie|some text|some text
My third column is my... (9 Replies)
Hi,
This may not be the right forum but i am hoping someone knows an answer to this.
I have to capture rows for a column that was deleted. How can i do that without having to write a select query?
delete from myschema.mytable where currentdatetimestamp > columnDate
this should delete 5... (4 Replies)
I have 2 files,
file01= 7 columns, row unknown (but few)
file02= 7 columns, row unknown (but many)
now I want to create an output with the first field that is shared in both of them and then subtract the results from the rest of the fields and print there
e.g.
file 01
James|0|50|25|10|50|30... (1 Reply)
i have a table like this:
id, senderNumber, blacklist
-----------------------------
1 0835636326 Y
2 0373562343 Y
3 0273646833 Y
and I want to delete automatically if a new inserted row on another table consist anything on senderNumber column above using a BASH Script
I... (9 Replies)
CAT(1) BSD General Commands Manual CAT(1)NAME
cat -- concatenate and print files
SYNOPSIS
cat [-benstuv] [file ...]
DESCRIPTION
The cat utility reads files sequentially, writing them to the standard output. The file operands are processed in command-line order. If
file is a single dash ('-') or absent, cat reads from the standard input. If file is a UNIX domain socket, cat connects to it and then reads
it until EOF. This complements the UNIX domain binding capability available in inetd(8).
The options are as follows:
-b Number the non-blank output lines, starting at 1.
-e Display non-printing characters (see the -v option), and display a dollar sign ('$') at the end of each line.
-n Number the output lines, starting at 1.
-s Squeeze multiple adjacent empty lines, causing the output to be single spaced.
-t Display non-printing characters (see the -v option), and display tab characters as '^I'.
-u Disable output buffering.
-v Display non-printing characters so they are visible. Control characters print as '^X' for control-X; the delete character (octal
0177) prints as '^?'. Non-ASCII characters (with the high bit set) are printed as 'M-' (for meta) followed by the character for the
low 7 bits.
EXIT STATUS
The cat utility exits 0 on success, and >0 if an error occurs.
EXAMPLES
The command:
cat file1
will print the contents of file1 to the standard output.
The command:
cat file1 file2 > file3
will sequentially print the contents of file1 and file2 to the file file3, truncating file3 if it already exists. See the manual page for
your shell (i.e., sh(1)) for more information on redirection.
The command:
cat file1 - file2 - file3
will print the contents of file1, print data it receives from the standard input until it receives an EOF ('^D') character, print the con-
tents of file2, read and output contents of the standard input again, then finally output the contents of file3. Note that if the standard
input referred to a file, the second dash on the command-line would have no effect, since the entire contents of the file would have already
been read and printed by cat when it encountered the first '-' operand.
SEE ALSO head(1), more(1), pr(1), sh(1), tail(1), vis(1), zcat(1), setbuf(3)
Rob Pike, "UNIX Style, or cat -v Considered Harmful", USENIX Summer Conference Proceedings, 1983.
STANDARDS
The cat utility is compliant with the IEEE Std 1003.2-1992 (``POSIX.2'') specification.
The flags [-benstv] are extensions to the specification.
HISTORY
A cat utility appeared in Version 1 AT&T UNIX. Dennis Ritchie designed and wrote the first man page. It appears to have been cat(1).
BUGS
Because of the shell language mechanism used to perform output redirection, the command ``cat file1 file2 > file1'' will cause the original
data in file1 to be destroyed!
The cat utility does not recognize multibyte characters when the -t or -v option is in effect.
BSD March 21, 2004 BSD