Login or Register to Ask a Question and Join Our Community

Sponsored Content
Full Discussion: To find record having null value
Top Forums Shell Programming and Scripting To find record having null value Post 302988264 by Aia on Thursday 22nd of December 2016 03:59:00 PM
Old 12-22-2016
Quote:
Originally Posted by Aia
Please, could you provide a realistic input sample of your file?
Please, could you provide a sample of the kind of output you want based on that input file?
Quote:
Originally Posted by ginrkf
Hi Please find my sample file

File1
Code:
123,asd,fgh,nmb,pok
134,,fg,mnm,mnb

For the above file I need to reject the second record as the second column contain null value.

File2

Code:
1235,afg,fgdf,nmbs,posk
1345,,fg,,mnsb

For file 2 by requirement is different where I need to reject a record where 2nd and 4th column is null

So I want to write a unique command where I can pass the column position to check where it is null or not.For ex. I want to pass column position as 2 for the first file and column position as 2&4 for the second file
Unfortunately, you did not provide a sample of the desired output and your words leave a lot to interpretation. The input provided is quite ambiguous, as well, due to the skimpiness of the sample.
In post #1 you said:
Quote:
All my files are pipe delimited
Which make the examples not realistic neither.

Quote:
I need to reject a record where 2nd and 4th column is null
A record normally is a string of characters terminated at the new line (a full human line). Is that the same way you are interpreting it? Do you want the resulted output to exclude any lines that match your criteria?
In your comment "2nd and 4th column is null":
Is your criteria for File2 to exclude the lines that have BOTH fields 2 AND 4 empty or to exclude lines that have EITHER fields 2 OR 4 empty?
Last edited by Aia; 12-22-2016 at 07:20 PM..
 

10 More Discussions You Might Find Interesting

1. UNIX for Dummies Questions & Answers

Find files which contain a null character

Hi, I would like to use grep to find files which contain NULL characters. I'm not sure how to represent the null character in the grep statement. Could anyone help please? Thanks! Helen :confused: (5 Replies)
Discussion started by: Bab00shka
5 Replies

2. Shell Programming and Scripting

If statement falling over on a null record. Help please.

Okay i've got some code which reads a text file and loops through it and there a few if statements inside where one is failing (the one bolded). Basically the acc column contains a list of three digit access codes, some though have null records (i.e nothing in the field) so what I want to do is... (3 Replies)
Discussion started by: TonyR
3 Replies

3. Shell Programming and Scripting

Find null fields in file

Hi All, I have some csv files out of which i want to find records which have empty values in either the 14th or 16th fields. The following is a sample. $cut -d',' -f14,16 SPS* | head -5 VOIP_ORIG_INFO,VOIP_DEST_INFO sip:445600709315@sip.com,sip:999@sip.com... (2 Replies)
Discussion started by: rahulrathod
2 Replies

4. Shell Programming and Scripting

How can find Null value in If condition

Hi, i wrote If Conditions in my script, it's returns null and some values. but i am unable to find when Null value getting. bec we need modification according null vales. pls help me on this. (2 Replies)
Discussion started by: koti_rama
2 Replies

5. UNIX for Dummies Questions & Answers

Using /dev/null with grep and find

Hi, I am trying to display the filename in which a string was found after using find and grep. For this after some googling I found that this works: find -name "*.java" -exec grep "searchStr" {} /dev/null \; I wanted to know the difference between the above and the following: find -name... (0 Replies)
Discussion started by: gaurav_s
0 Replies

6. Shell Programming and Scripting

Find out if few fields in a file are null

Hi, I've a pipe delimited file where I want to find out a number of lines where 1st 2nd and last field are null using awk/sed. Is it possible? Thanks (5 Replies)
Discussion started by: rudoraj
5 Replies

7. Shell Programming and Scripting

how to find null column

Hi, everyone I have a requirement as following: source file 1, abc, def, caaa 2, , cde, aaa 3, bcd, , adefefg I need find columns which contains null value, in above example, I need get two rows 2, , cde, aaa 3, bcd, , adefefg anybody has idea how to achive this ... (5 Replies)
Discussion started by: ken002
5 Replies

8. Shell Programming and Scripting

Egrep ERE to find null

Hello All, My apologies if a similar question has already been posted. I searched for "grep", "egrep" and "null" I'm having an issue with egrep and an extended regular expression. I'm doing a test for a job name. I would like to have the user enter a job name with no spaces and also test to... (7 Replies)
Discussion started by: sydox
7 Replies

9. Shell Programming and Scripting

How to find null column?

hi Gurus, I need find the null column in a file. my file like below abc, ,cde,def abc,ded,cdd,def abc, ,ddd,ccd aaa,bbb,ccc,ddd basic, I need to find the lines which second column is null Thanks in advance (3 Replies)
Discussion started by: ken6503
3 Replies

10. Shell Programming and Scripting

Identify empty file with null record

Hi Team, I have a file abc.dat which is a empty file. But it has null record in first line. I need to identify this unique file and handle it separately. scenario 1: abc/dw> wc abc.dat 1 0 1 abc.dat abc/dw> cat abc.dat abc/dw> scenario 2: abc/dw> wc pqr.dat 0 0 0 pqr.dat... (3 Replies)
Discussion started by: kmanivan82
3 Replies

LEARN ABOUT FREEBSD

version.4th

VERSION.4TH(8)						    BSD System Manager's Manual 					    VERSION.4TH(8)

NAME

     version.4th -- FreeBSD version string boot module

DESCRIPTION

     The file that goes by the name of version.4th is a set of commands designed to draw the boot loader version at the bottom-right of the
     screen.  The commands of version.4th by themselves are not enough for most uses.  Please refer to the examples below for the most common sit-
     uations, and to loader(8) for additional commands.

     Before using any of the commands provided in version.4th, it must be included through the command:

	   include version.4th

     This line is present in the default /boot/menu.rc file, so it is not needed (and should not be re-issued) in a normal setup.

     The commands provided by it are:

	   print_version	  Prints the contents of the loader_version environment variable right-justified at the column loader_version_x
				  and row loader_version_y.

     The environment variables that effect its behavior are:

	   loader_version
		     Set automatically by loader(8), but you can override it by setting in loader.conf(5).  This should be the version of boot
		     loader used.

	   loader_version_x
		     Sets the desired ending column position of loader_version.  Default is 80.

	   loader_version_y
		     Sets the desired ending row position of loader_version.  Default is 24.

	   loader_color
		     If set to ``NO'' (case-insensitive) or ``0'', causes the version to be printed without color (default is ANSI Cyan).

FILES

     /boot/loader	The loader(8).
     /boot/version.4th	version.4th itself.
     /boot/loader.rc	loader(8) bootstrapping script.

EXAMPLES

     Override loader(8) version in loader.conf(5):

	   loader_version="loader 1.1"

SEE ALSO

     loader.conf(5), color.4th(8), loader(8)

HISTORY

     The version.4th set of commands first appeared in FreeBSD 9.0.

AUTHORS

     The version.4th set of commands was written by Devin Teske <dteske@FreeBSD.org>.

BSD
								  August 6, 2013							       BSD
All times are GMT -4. The time now is 03:55 PM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy