MYSQL_ROOT_PASSWORD="passwort"
query="$(cat <<END
UPDATE web_domain
SET pm = 'ondemand';
END
)"

# Backup
mysqldump -uroot -p"$MYSQL_ROOT_PASSWORD" dbispconfig > /root/dbispconfig_pre_php_ram_saving_fix_`date +%F`.sql

# Änderung vornehmen
mysql -uroot -p"$MYSQL_ROOT_PASSWORD" dbispconfig -e "$query"