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my @where; my $sql = 'select * from table'; ... push @where, 'column3 = "' . $var3 . '" ' if defined $var3; $sql = $sql . ' where ' . join(' and ', @where);
my @values = (undef, $var1, $var2, $var3); my @where; ... } $sql = $sql . ' where ' . join(' and ', @where);
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