tcpdump -i lo -s 0 -l -w - dst port 3306|strings |egrep -i "SELECT|UPDATE|DELETE|INSERT|SET|COMMIT|ROLLBACK|CREATE|DROP|ALTER"


或者

 tcpdump -i lo -s 0 -l -w - dst port 3306 | strings | perl -e '

while(<>) { chomp; next if /^[^ ]+[ ]*$/;

  if(/^(SELECT|UPDATE|DELETE|INSERT|SET|COMMIT|ROLLBACK|CREATE|DROP|ALTER)/i) {

    if (defined $q) { print "$q\n"; }

    $q=$_;

  } else {

    $_ =~ s/^[ \t]+//; $q.=" $_";

  }

}'