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Top Forums UNIX for Dummies Questions & Answers Check for not null column in a pipe delimited file Post 302974867 by reshma15193 on Sunday 5th of June 2016 05:04:16 AM
Old 06-05-2016
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 records.
Please help!
 

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COLUMN(1)						    BSD General Commands Manual 						 COLUMN(1)

NAME
column -- columnate lists SYNOPSIS
column [-tx] [-c columns] [-s sep] [file ...] DESCRIPTION
The column utility formats its input into multiple columns. Rows are filled before columns. Input is taken from file operands, or, by default, from the standard input. Empty lines are ignored. The options are as follows: -c Output is formatted for a display columns wide. -s Specify a set of characters to be used to delimit columns for the -t option. -t Determine the number of columns the input contains and create a table. Columns are delimited with whitespace, by default, or with the characters supplied using the -s option. Useful for pretty-printing displays. -x Fill columns before filling rows. column exits 0 on success, >0 if an error occurred. ENVIRONMENT
COLUMNS The environment variable COLUMNS is used to determine the size of the screen if no other information is available. EXAMPLES
(echo "PERM LINKS OWNER GROUP SIZE MONTH DAY HH:MM/YEAR NAME"; ls -l | sed 1d) | column -t SEE ALSO
colrm(1), ls(1), paste(1), sort(1) HISTORY
The column command appeared in 4.3BSD-Reno. BSD
March 9, 2008 BSD
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