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With 40 post here, you should now how to use Code Tags

awk 'NR>=3 && NR<=5 {$0="OK "$0} 1'
surya
rama
OK ranga
OK laxman
OK rajesh
reddy

awk '/KVB/ {$0=$0" BANK"} 1' file

PS Use code tags

awk 'NR==FNR{a[$1]=$2;next}{print $1, $2, a[$2]}' file2 file1

perl -lane 'open I, "< file2";
for (<I>) {
chomp; @x = split /\s+/;
($F[1] eq $x[0]) && print "$F[0] $F[1] $x[1]";
}; close I' file1

The same, but add an "r" as argument:

sort -t\| +1nr infile

sort -t\| +1n infile

$
$ echo "01-08-2011" | awk -F- '{print $3$2$1}'
20110801
$
$ # GNU sed
$ echo "01-08-2011" | sed 's/^\([0-9]\+\)-\([0-9]\+\)-\([0-9]\+\)$/\3\2\1/'
20110801
$
$ echo "01-08-2011" | perl -F-...

If there are only two fields, this will work.

awk -F"|" '{print $2"|"$1}' filename

Hi suryanarayana,

Try with:
awk 'BEGIN{FS=OFS="|"}{print $2,$1}' inputfile
xyz|abc
567|123
Regards