Clean Magento database

TRUNCATE TABLE `dataflow_batch_export`;
TRUNCATE TABLE `dataflow_batch_import`;
TRUNCATE TABLE `log_customer`;
TRUNCATE TABLE `log_quote`;
TRUNCATE TABLE `log_summary`;
TRUNCATE TABLE `log_summary_type`;
TRUNCATE TABLE `log_url`;
TRUNCATE TABLE `log_url_info`;
TRUNCATE TABLE `log_visitor`;
TRUNCATE TABLE `log_visitor_info`;
TRUNCATE TABLE `log_visitor_online`;
TRUNCATE TABLE `report_viewed_product_index`;
TRUNCATE TABLE `report_compared_product_index`;
TRUNCATE TABLE `report_event`;