Hey Programatic you are also doing the same but you are passing all the column names once by using join & map. Good thought. But in place holders If i place table name its showing a error.

DBD::mysql::st execute failed: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ''CDR' where Date = '13-10-2015' and Hour like '00:%'' at line 1 at DB_Test.pl line 25.

So I replaced my '?' with table name. Then its working good. Even though I used your logic I need to maintain all my column names in array. I want to change that. Here I am writing all columns in program into big arrays which is looking odd. Can I get that coloumn names from db???

Sample (Tested) 

#!/usr/bin/perl
use strict;
use warnings;

use DBI;
my $db_date=$ARGV[0]; #04-10-2015

my $hour = "00";
my $db_name   = "ravi";
my $table_name = "CDR";
my $host      = "xxx.xx.x.xxx";

my @CDR_array = ("Total_MO","Total_MO_sucess","MO_userdep_error","MO_s
+ubcrib_error","MO_system_error","Total_MO_success_rate","Total_AO","T
+otal_AO_sucess","AO_userdep_error","AO_subcrib_error","AO_system_erro
+r","Total_AO_success_rate","Total_MT_P2P","Total_MT_sucess_P2P","MT_P
+2P_userdep_error","MT_P2P_subcrib_error","MT_P2P_system_error","Total
+_MT_P2P_success_rate","Total_MT_A2P","Total_MT_sucess_A2P","MT_A2P_us
+erdep_error","MT_A2P_subcrib_error","MT_A2P_system_error","Total_MT_A
+2P_success_rate","Total_AT","Total_AT_sucess","AT_ESMEdep_error","AT_
+network_error","AT_system_error","Total_AT_success_rate","P2P_FDA_cou
+nt","P2P_FDA_success_count","P2P_FDA_success_rate","A2P_FDA_count","A
+2P_FDA_success_count","A2P_FDA_success_rate","Total_Count","Total_TPS
+","Greatest_TPS");

my $dbh = DBI->connect("DBI:mysql:database=$db_name;host=$host;mysql_s
+ocket=/opt/lampstack-5.5.27-0/mysql/tmp/mysql.sock","root","",{'Raise
+Error' => 1});

my $sql = "select ".join ",", map { "sum($_)" } @CDR_array;
$sql .= " from CDR where Date = ? and Hour like ?";

my $sth = $dbh->prepare( $sql ) or die "Cant get prepare";
$sth->execute($db_date, "$hour:%") or die $DBI::errstr;

my @my_array = $sth->fetchrow_array();

print $my_array[1],$/;
print @my_array,$/;

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In reply to Re^8: using system command in regex by ravi45722
in thread using system command in regex by ravi45722

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