Assuming your update statement is correct, given your database structure and Oracle (I'm more familiar with mySQL): 
use DBI;
use strict;

my $user = 'user';
my $pass = 'pass';
my $db = 'database';
my $filename = 'filename.txt';

my $query = qq*
update
    ( 
    select t1.field1, 999 deact_status 
    from  
        schema.table1 t1
        inner join schema.table2 t2 on t1.id = t2.id
    where 
        t2.field2 = ?
    ) 
set 
    field1 = deact_status
*;

my ($dbh, $sth, $handle);

$dbh = DBI->connect("dbi:Oracle:$db", $user, $pass)
    ||  die "Couldn't connect to database: " . DBI->errstr;

open ($handle, $filename)
    || die "Couldn't open $filename for read.\n";

while (<$handle>) {
    chomp;
    $sth = $dbh->prepare_cached($query, {}, 1);
    $sth->execute($_);
}

$dbh->disconnect();

[download]
This is untested, but ought to work in theory.

In reply to Re: Oracle mass update script request. by TedPride
in thread Oracle mass update script request. by dbmathis

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