Find and replace a column that has '' to NULL in a comma delimited using awk or sed Post: 302421519

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

awk/sed column replace using column header - help

$ cat log.txt Name Age Sex Lcation nfld alias xsd CC 25 M XYZ asx KK Y BB 21 F XAS awe SS N SD 21 M AQW rty SD A How can I replace the column with header "Lcation" with the column with header "alias" and delete the "alias" column? so that the final output will become: Name Age Sex...

2. UNIX for Dummies Questions & Answers

Trim String in 3rd Column in Tab Delimited File...SED/PERL/AWK?

Hey Everybody, I am having much trouble figuring this out, as I am not really a programmer..:mad: Datafile.txt Column0 Column1 Column2 ABC DEF xxxGHI I am running using WGET on a cronjob to grab a datafile, but I need to cut the first three characters from...

3. Shell Programming and Scripting

Need an awk for a global find/replace in a file, specific column

I am new to unix and awk/sed etc... using C-Shell. Basically, I have a fixed length file that has 4 different record types on it, H, D, V, W all in column 1. I need to change all the W's in column 1 to D's. in the entire file. The W's can be anywhere in the file and must remain in the same...

4. Shell Programming and Scripting

Replace last row of a column in bash/awk/sed

Hi, I've got a file with 3 columns which ends like this: ... 1234 345 1400 5287 733 1400 8472 874 1400 9317 726 1400 I want to replace the last row of the last column with the value 0. So my new file will end: ... 1234 345 1400 5287 733 1400 8472 874 1400 9317 726 ...

5. Shell Programming and Scripting

Find in first column and replace the line with Awk, and output new file

Find in first column and replace the line with Awk, and output new file File1.txt"2011-11-02","Georgia","Atlanta","x","","" "2011-11-03","California","Los Angeles","x","","" "2011-11-04","Georgia","Atlanta","x","x","x" "2011-11-05","Georgia","Atlanta","x","x","" ...

6. Shell Programming and Scripting

Count number of column in a comma delimited file

I have a comma (,) delimited file. 106232145,"medicare","medicare,medicaid",789 I would like to count the number of fields in each line. I tried the below code awk -F ',' '{print NF-1}' This returns me the result as 5 instead of 4. This is because the awk takes...

7. 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.

8. Shell Programming and Scripting

Replace pipe delimited column string to null

Hi All, I have a large dat file where each lines are pipe delimited values. I need to parse the file depending on the request. For example: sometimes I have told to remove all the values in the 7th column (this case remove values '3333' only from the first line and '3543' from the second line)...

9. UNIX for Dummies Questions & Answers

Check for not null column in a pipe delimited file

Hi, I have a requirement where I have to check whether the mandatory columns in a pipe delimited file is null and print error message. For eg, I have to check if the 3rd,5th,6th,7th and 8th column are null and print the message "<column name> is null". The data file will have aroung 100,000...

10. UNIX for Beginners Questions & Answers

Replace a column in tab delimited file with column in other tab delimited file,based on match

Hello Everyone.. I want to replace the retail col from FileI with cstp1 col from FileP if the strpno matches in both files FileP.txt ...

LEARN ABOUT DEBIAN

dpkg-awk

DPKG-AWK(1)						      General Commands Manual						       DPKG-AWK(1)

NAME

       dpkg-awk - Utility to read a dpkg style db file

SYNOPSIS

       dpkg-awk [(-f|--file) filename] [(-d|--debug) ##] [(-s|--sort) list] [(-rs|--rec_sep) ??] '<fieldname>:<regex>' ... -- <out_fieldname> ..

DESCRIPTION

       dpkg-awk  Parses  a  dpkg status file (or other similarly formatted file) and outputs the resulting records.  It can use regex on the field
       values to limit the returned records, it can also be told which fields to output, and it can sort the matched fields.

OPTIONS

       -f filename
       --file filename
	      The file to parse.  The default is /var/lib/dpkg/status.

       -d [#]
       --debug [#]
	      Each time this is specified, it increased the debug level.

       -s field(s)
       --sort field(s)
	      A space or comma separated list of fields to sort on.

       -n field(s)
       --numeric field(s)
	      A space or comma separated list of fields that should be interpreted as numeric in value.

       -rs ??
       --rec_sep ??
	      Output this string at the end of each output paragraph.

       -h
       --help Display some help.

       fieldname
	      The fields from the file, that are matched with the regex given.	The fieldnames are case insensitive.

       out_fieldname
	      The fields from the file, that are output for each record.  If the first field listed begins with ^, then the list  of  fields  that
	      follows will NOT be output.

BUGS

       Be  warned  that  the author has only a shallow understanding of the dpkg packaging system, so there are probably tons of bugs in this pro-
       gram.

       This program comes with no warranties.  If running this program causes fire and brimstone to rain down upon the earth, you will be on  your
       own.

       This program accesses the dpkg database directly in places, querying for data that cannot be gotten via dpkg.

AUTHOR

       Adam Heath <doogie@debian.org>

DEBIAN
								 Debian Utilities						       DPKG-AWK(1)

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

awk/sed column replace using column header - help

Discussion started by: jkl_jkl

2. UNIX for Dummies Questions & Answers

Trim String in 3rd Column in Tab Delimited File...SED/PERL/AWK?

Discussion started by: rickdini

3. Shell Programming and Scripting

Need an awk for a global find/replace in a file, specific column

Discussion started by: jclanc8

4. Shell Programming and Scripting

Replace last row of a column in bash/awk/sed

Discussion started by: jhunter87