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Full Discussion: Search for partial matches in particular column
Top Forums UNIX for Dummies Questions & Answers Search for partial matches in particular column Post 302948005 by jianp83 on Wednesday 24th of June 2015 03:43:55 PM
Old 06-24-2015
Search for partial matches in particular column
I have a list

Code:
a
b
c
d

I want to search this list to have partial matches in column 2 in data file

Code:
col1	col2	col3
1	a/e	aa
2	b/e	aa
3	z/y	aa
4	t/u	bb
5	d/f	aa
6	a/t	aa

and extract the relevant rows with header

Code:
col1	col2	col3
1	a/e	aa
2	b/e	aa
5	d/f	aa
6	a/t	aa

What am I doing incorrectly here? Please assist.

Code:
awk  'NR==FNR{a[$1];next}{ for(i=1;i<=length(a);i++) if (($2~a[i]) || (NR==1) ){ print }}' list data

 

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LEARN ABOUT LINUX

colrm

COLRM(1)						    BSD General Commands Manual 						  COLRM(1)

NAME

     colrm -- remove columns from a file

SYNOPSIS

     colrm [start [stop]]

DESCRIPTION

     The colrm utility removes selected columns from the lines of a file.  A column is defined as a single character in a line.  Input is read
     from the standard input.  Output is written to the standard output.

     If only the start column is specified, columns numbered less than the start column will be written.  If both start and stop columns are spec-
     ified, columns numbered less than the start column or greater than the stop column will be written.  Column numbering starts with one, not
     zero.

     Tab characters increment the column count to the next multiple of eight.  Backspace characters decrement the column count by one.

ENVIRONMENT

     The LANG, LC_ALL and LC_CTYPE environment variables affect the execution of colrm as described in environ(7).

EXIT STATUS

     The colrm utility exits 0 on success, and >0 if an error occurs.

SEE ALSO

     awk(1), column(1), cut(1), paste(1)

HISTORY

     The colrm command appeared in 3.0BSD.

BSD
								  August 4, 2004							       BSD
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