How to reset test orders and dashboard statistics - Magento

    SET FOREIGN_KEY_CHECKS=0;
    TRUNCATE `catalogsearch_query`;
    ALTER TABLE `catalogsearch_query` AUTO_INCREMENT=1;

    -- reset sales order info
    TRUNCATE `sales_flat_order`;
    TRUNCATE `sales_flat_order_address`;
    TRUNCATE `sales_flat_order_grid`;
    TRUNCATE `sales_flat_order_item`;
    TRUNCATE `sales_flat_order_payment`;
    TRUNCATE `sales_flat_order_status_history`;

    TRUNCATE `sales_flat_quote`;
    TRUNCATE `sales_flat_quote_address`;
    TRUNCATE `sales_flat_quote_address_item`;
    TRUNCATE `sales_flat_quote_item`;
    TRUNCATE `sales_flat_quote_item_option`;
    TRUNCATE `sales_flat_order_item`;
    TRUNCATE `sendfriend_log`;
    TRUNCATE `tag`;
    TRUNCATE `tag_relation`;
    TRUNCATE `tag_summary`;
    TRUNCATE `wishlist`;
    TRUNCATE `log_quote`;
    TRUNCATE `report_event`;
    TRUNCATE `tag_relation`;
    TRUNCATE `tag_summary`;
    TRUNCATE `wishlist`;
    TRUNCATE `log_quote`;
    TRUNCATE `report_event`;

    ALTER TABLE `sales_flat_order` AUTO_INCREMENT=1;
    ALTER TABLE `sales_flat_order_address` AUTO_INCREMENT=1;
    ALTER TABLE `sales_flat_order_grid` AUTO_INCREMENT=1;
    ALTER TABLE `sales_flat_order_item` AUTO_INCREMENT=1;
    ALTER TABLE `sales_flat_order_payment` AUTO_INCREMENT=1;
    ALTER TABLE `sales_flat_order_status_history` AUTO_INCREMENT=1;

    ALTER TABLE `sales_flat_quote` AUTO_INCREMENT=1;
    ALTER TABLE `sales_flat_quote_address` AUTO_INCREMENT=1;
    ALTER TABLE `sales_flat_quote_address_item` AUTO_INCREMENT=1;
    ALTER TABLE `sales_flat_quote_item` AUTO_INCREMENT=1;
    ALTER TABLE `sales_flat_quote_item_option` AUTO_INCREMENT=1;
    ALTER TABLE `sales_flat_order_item` AUTO_INCREMENT=1;
    ALTER TABLE `sendfriend_log` AUTO_INCREMENT=1;
    ALTER TABLE `tag` AUTO_INCREMENT=1;
    ALTER TABLE `tag_relation` AUTO_INCREMENT=1;
    ALTER TABLE `tag_summary` AUTO_INCREMENT=1;
    ALTER TABLE `wishlist` AUTO_INCREMENT=1;
    ALTER TABLE `log_quote` AUTO_INCREMENT=1;
    ALTER TABLE `report_event` AUTO_INCREMENT=1;

    -- Reset all ID counters
    TRUNCATE `eav_entity_store`;
    ALTER TABLE `eav_entity_store` AUTO_INCREMENT=1;

    -- set appropriate prefixes for orders, invoices, shipments, credit memos
    INSERT INTO `YOUR_DB_NAME`.`eav_entity_store` (`entity_store_id` ,`entity_type_id` ,`store_id` ,`increment_prefix` ,`increment_last_id`) VALUES ('1', '11', '1', '1', '000000000');
    update `eav_entity_store` set `increment_prefix`= 1 where `entity_type_id`='5' and `store_id`='1';
    update `eav_entity_store` set `increment_last_id`= '000000000' where `entity_type_id`='4' and `store_id`='1';

    INSERT INTO `YOUR_DB_NAME`.`eav_entity_store` (`entity_store_id` ,`entity_type_id` ,`store_id` ,`increment_prefix` ,`increment_last_id`) VALUES ('2', '16', '1', '2', '000000000');
    update `eav_entity_store` set `increment_prefix`= 2 where `entity_type_id`='6' and `store_id`='1';
    update `eav_entity_store` set `increment_last_id`= '000000000' where `entity_type_id`='18' and `store_id`='1';

    INSERT INTO `YOUR_DB_NAME`.`eav_entity_store` (`entity_store_id` ,`entity_type_id` ,`store_id` ,`increment_prefix` ,`increment_last_id`) VALUES ('3', '19', '1', '3', '000000000');
    update `eav_entity_store` set `increment_prefix`= 3 where `entity_type_id`='8' and `store_id`='1';
    update `eav_entity_store` set `increment_last_id`= '000000000' where `entity_type_id`='24' and `store_id`='1';

    INSERT INTO `YOUR_DB_NAME`.`eav_entity_store` (`entity_store_id` ,`entity_type_id` ,`store_id` ,`increment_prefix` ,`increment_last_id`) VALUES ('4', '23', '1', '4', '000000000');
    update `eav_entity_store` set `increment_prefix`= 4 where `entity_type_id`='7' and `store_id`='1';
    update `eav_entity_store` set `increment_last_id`= '000000000' where `entity_type_id`='28' and `store_id`='1';

    SET FOREIGN_KEY_CHECKS=1;