+$MYSQLCMD -e "DROP TABLE zipcodes; UPDATE civicrm_domain SET config_backend = NULL; DELETE FROM civicrm_extension; DELETE FROM civicrm_cache; UPDATE civicrm_setting SET value = NULL WHERE group_name IN ('Directory Preferences','URL Preferences');"
+TABLENAMES=$( echo "show tables like 'civicrm_%'" | $MYSQLCMD | grep ^civicrm_ | xargs )