Sponsored Content
Top Forums Shell Programming and Scripting identifying null values in a file Post 302166704 by dsravan on Tuesday 12th of February 2008 02:42:31 PM
Old 02-12-2008
identifying null values in a file

I have a huge file with 20 fileds in each record and each field is seperated by "|". If i want to get all the reocrds that have 18th or for that matter any filed as null how can i do it? Please let me know
 

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Null values after emptying a log file

Hi, I have a log file which is constantly being written to by some process. I need to clear that log file on a daily basis. The problem is that when I issue this command: echo "" > logfile.log the file gets filled with nulls thus increasing the size of the file. Is there a way to... (2 Replies)
Discussion started by: kasie4life
2 Replies

2. Shell Programming and Scripting

How to check Null values in a file column by column if columns are Not NULLs

Hi All, I have a table with 10 columns. Some columns(2nd,4th,5th,7th,8th and 10th) are Not Null columns. I'll get a tab-delimited file and want to check col by col and generate seperate error code for each col eg:102 if 2nd col value is NULL and 104 if 4th col value is NULL so on... I am a... (7 Replies)
Discussion started by: Mandab
7 Replies

3. UNIX for Advanced & Expert Users

How to Compare Null values??

Hi, Can someone help me comparing Null values. Scenario is as follows: I have a variable which "cache_prd" which can have either some integer or nothing(Null) if it is integer I have to again do some comparision but these comparisons give me this error:( "line 32: [: 95: unary operator... (3 Replies)
Discussion started by: Yagami
3 Replies

4. Shell Programming and Scripting

Find for line with not null values at nth place in pipe delimited file

Hi, I am trying to find the lines in a pipe delimited file where 11th column has not null values. Any help is appreciated. Need help asap please. thanks in advance. (3 Replies)
Discussion started by: manikms
3 Replies

5. Shell Programming and Scripting

File values alwaya null

Hi All , below is my shell program. !/bin/sh set -x #---------------------------------------------------------------------------------------- # Program : weekly_remove_icd_file.sh # Author : # Date : 04/06/2013 # Purpose : Execute the script to... (3 Replies)
Discussion started by: krupasindhu18
3 Replies

6. Shell Programming and Scripting

Replace a field where values are null in a file.

Hi, I've a pipe delimited file and wanted to replace the 3rd field to 099990 where the values are null. How can I achieve it using awk or sed. 20130516|00000061|02210|111554|03710|2|205069|SM APPL $80-100 RTL|S 20130516|00000061|02210|111554|03710|2|205069|SM APPL $80-100 RTL|S... (12 Replies)
Discussion started by: rudoraj
12 Replies

7. Shell Programming and Scripting

Identifying columns and their values based on schema file

I have 3 files, data file,schema file and a threshold file. Data file contains data in which columns are distributed according to schema file. This data file doesn't contain any headers. Three continuous columns in the data file represent single variable in schema file. first column represent... (1 Reply)
Discussion started by: bharathbangalor
1 Replies

8. Shell Programming and Scripting

Grep null values in a file with no delimiter

Hi Folks, We have a file that has null values but there are no delimiters. So all columns are considered as a single column. Ex: abc def 123 abcdef1234567 hijklmn7896545 Now from "a" till "3" all are considered as a single column from the first row. Our requirement is like, we... (2 Replies)
Discussion started by: jayadanabalan
2 Replies

9. Shell Programming and Scripting

Fields shifting in file, do to null values?

The below code runs and creates an output file with three sections. The first 2 sections are ok, but the third section doesn't seem to put a . in all the fields that are blank. I don't know if this is what causes the last two fields in the current output to shift to a newline, but I can not seem... (3 Replies)
Discussion started by: cmccabe
3 Replies

10. Shell Programming and Scripting

Count null values in a file using awk

I have the following a.txt file A|1|2|3|4|5| A||2|3|0|| A|1|6||8|10| A|9|2|3|4|1| A|0|9|3|4|5| A||2|3|4|5| A|0|av|.9|4|9| I use the following command to count null values for 2nd field awk -F"|" '!$2 { N++; next } END {print N}' a.txt It should give the result 2, but it is giving... (2 Replies)
Discussion started by: RJG
2 Replies
ACTIVE(5)							File Formats Manual							 ACTIVE(5)

NAME
active, active.times - list of active Usenet newsgroups DESCRIPTION
The file /var/lib/news/active lists the newsgroups that the local site receives. Each newsgroup should be listed only once. Each line specifies one group; their order in the file does not matter. Within each newsgroup, articles are assigned unique names, which are mono- tonically increasing numbers. If an article is posted to newsgroups not mentioned in this file, those newsgroups are ignored. If no valid newsgroups are specified, the article is filed into the newsgroup ``junk'' and only propagated to sites that receive the ``junk'' newsgroup. Each line consists of four fields specified by a space: name himark lomark flags The first field is the name of the newsgroup. The second field is the highest article number that has been used in that newsgroup. The third field is the lowest article number in the group; this number is not guaranteed to be accurate, and should only be taken to be a hint. Note that because of article cancellations, there may be gaps in the numbering sequence. If the lowest article number is greater then the highest article number, then there are no articles in the newsgroup. In order to make it possible to update an entry in-place without rewriting the entire file, the second and third fields are padded out with leading zeros to make them a fixed width. The fourth field can contain one of the following flags: y Local postings are allowed n No local postings are allowed, only remote ones m The group is moderated and all postings must be approved j Articles in this group are not kept, but only passed on x Articles cannot be posted to this newsgroup =foo.bar Articles are locally filed into the ``foo.bar'' group If a newsgroup has the ``j'' flag, then no articles will be filed into that newsgroup and local postings to that group should not be gener- ated. If an article for such a newsgroup is received from a remote site, it will be filed into the ``junk'' newsgroup if it is not cross- posted. This is different from not having a newsgroup listed in the file because sites can subscribe to ``j'' newsgroups and the article will be propagated to them. If the fourth field of a newsgroup starts with an equal sign, then the newsgroup is an alias. Articles can be posted to the group, but will be treated as if they were posted to the group named after the equal sign. The second and third fields are ignored. Note that the Newsgroup header is not modified (Alias groups are typically used during a transition, and are typically created with ctlinnd(8)). An alias newsgroup should not point to another alias. The file /var/lib/news/active.times provides a chronological record of when newsgroups are created. This file is normally updated by innd(8) whenever a ctlinnd ``newgroup'' command is done. Each line consist of three fields: name time creator The first field is the name of the newsgroup. The second field is the time it was created, expressed as the number of seconds since the epoch -- i.e., a time_t; see gettimeofday(2). The third field is the electronic mail address of the person who created the group. HISTORY
Written by Rich $alz <rsalz@uunet.uu.net> for InterNetNews. This is revision 1.13, dated 1996/10/29. SEE ALSO
ctlinnd(8), innd(8). ACTIVE(5)
All times are GMT -4. The time now is 01:35 PM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy