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Top Forums Shell Programming and Scripting To find record having null value Post 302988210 by ginrkf on Wednesday 21st of December 2016 11:28:04 PM
Old 12-22-2016
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
 

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COMM(1) 						    BSD General Commands Manual 						   COMM(1)

NAME
comm -- select or reject lines common to two files SYNOPSIS
comm [-123f] file1 file2 DESCRIPTION
The comm utility reads file1 and file2, which should be sorted lexically, and produces three text columns as output: lines only in file1; lines only in file2; and lines in both files. The filename ``-'' means the standard input. The following options are available: -1 Suppress printing of column 1. -2 Suppress printing of column 2. -3 Suppress printing of column 3. -f Fold case in line comparisons. Each column will have a number of tab characters prepended to it equal to the number of lower numbered columns that are being printed. For example, if column number two is being suppressed, lines printed in column number one will not have any tabs preceding them, and lines printed in column number three will have one. comm assumes that the files are lexically sorted; all characters participate in line comparisons. EXIT STATUS
comm exits 0 on success, >0 if an error occurred. SEE ALSO
cmp(1), diff(1), sort(1), uniq(1) STANDARDS
The comm utility conforms to IEEE Std 1003.2-1992 (``POSIX.2''). BSD
June 6, 1993 BSD
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