use strict;
my $str = 'SELECT * FROM table ORDER BY name
SELECT a.* FROM (SELECT * FROM table ORDER BY name, created_at) AS a ORDER BY a.name
SELECT t0.* FROM table t0 WHERE t0.created_at IS NOT NULL ORDER BY t0.name, t0.created_at, t0.status LIMIT 10 OFFSET 10';
my $regex = qr/ORDER BY.*?(?=\s*LIMIT|\)|$)/mip;
my $subst = '';
my $result = $str =~ s/$regex/$subst/rg;
print "The result of the substitution is' $result\n";
Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for Perl, please visit: http://perldoc.perl.org/perlre.html