Clearing Magento after testing

    ***********for categories********************
TRUNCATE TABLE `catalog_category_entity`;
TRUNCATE TABLE `catalog_category_entity_datetime`;
TRUNCATE TABLE `catalog_category_entity_decimal`;
TRUNCATE TABLE `catalog_category_entity_int`;
TRUNCATE TABLE `catalog_category_entity_text`;
TRUNCATE TABLE `catalog_category_entity_varchar`;
TRUNCATE TABLE `catalog_category_product`;
TRUNCATE TABLE `catalog_category_product_index`;
 
INSERT  INTO `catalog_category_entity`(`entity_id`,`entity_type_id`,`attribute_set_id`,`parent_id`,`created_at`,`updated_at`,`path`,`POSITION`,`level`,`children_count`) VALUES (1,3,0,0,'0000-00-00 00:00:00','2009-02-20 00:25:34','1',1,0,1),(2,3,3,0,'2009-02-20 00:25:34','2009-02-20 00:25:34','1/2',1,1,0);
INSERT  INTO `catalog_category_entity_int`(`value_id`,`entity_type_id`,`attribute_id`,`store_id`,`entity_id`,`value`) VALUES (1,3,32,0,2,1),(2,3,32,1,2,1);
INSERT  INTO `catalog_category_entity_varchar`(`value_id`,`entity_type_id`,`attribute_id`,`store_id`,`entity_id`,`value`) VALUES (1,3,31,0,1,'Root Catalog'),(2,3,33,0,1,'root-catalog'),(3,3,31,0,2,'Default Category'),(4,3,39,0,2,'PRODUCTS'),(5,3,33,0,2,'default-category');

    *****************for customers*****************


    SET FOREIGN_KEY_CHECKS=0;
-- reset customers
TRUNCATE customer_address_entity;
TRUNCATE customer_address_entity_datetime;
TRUNCATE customer_address_entity_decimal;
TRUNCATE customer_address_entity_int;
TRUNCATE customer_address_entity_text;
TRUNCATE customer_address_entity_varchar;
TRUNCATE customer_entity;
TRUNCATE customer_entity_datetime;
TRUNCATE customer_entity_decimal;
TRUNCATE customer_entity_int;
TRUNCATE customer_entity_text;
TRUNCATE customer_entity_varchar;
TRUNCATE log_customer;
TRUNCATE log_visitor;
TRUNCATE log_visitor_info;

ALTER TABLE customer_address_entity AUTO_INCREMENT=1;
ALTER TABLE customer_address_entity_datetime AUTO_INCREMENT=1;
ALTER TABLE customer_address_entity_decimal AUTO_INCREMENT=1;
ALTER TABLE customer_address_entity_int AUTO_INCREMENT=1;
ALTER TABLE customer_address_entity_text AUTO_INCREMENT=1;
ALTER TABLE customer_address_entity_varchar AUTO_INCREMENT=1;
ALTER TABLE customer_entity AUTO_INCREMENT=1;
ALTER TABLE customer_entity_datetime AUTO_INCREMENT=1;
ALTER TABLE customer_entity_decimal AUTO_INCREMENT=1;
ALTER TABLE customer_entity_int AUTO_INCREMENT=1;
ALTER TABLE customer_entity_text AUTO_INCREMENT=1;
ALTER TABLE customer_entity_varchar AUTO_INCREMENT=1;
ALTER TABLE log_customer AUTO_INCREMENT=1;
ALTER TABLE log_visitor AUTO_INCREMENT=1;
ALTER TABLE log_visitor_info AUTO_INCREMENT=1;
SET FOREIGN_KEY_CHECKS=1;

For Orders

    SET FOREIGN_KEY_CHECKS=0; 
TRUNCATE `sales_flat_creditmemo`; 
TRUNCATE `sales_flat_creditmemo_comment`; 
TRUNCATE `sales_flat_creditmemo_grid`; 
TRUNCATE `sales_flat_creditmemo_item`; 
TRUNCATE `sales_flat_invoice`; 
TRUNCATE `sales_flat_invoice_comment`; 
TRUNCATE `sales_flat_invoice_grid`; 
TRUNCATE `sales_flat_invoice_item`; 
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_quote_payment`; 
TRUNCATE `sales_flat_quote_shipping_rate`; 
TRUNCATE `sales_flat_shipment`; 
TRUNCATE `sales_flat_shipment_comment`; 
TRUNCATE `sales_flat_shipment_grid`; 
TRUNCATE `sales_flat_shipment_item`; 
TRUNCATE `sales_flat_shipment_track`; 
TRUNCATE `sales_invoiced_aggregated`; 
TRUNCATE `sales_invoiced_aggregated_order`; 
TRUNCATE `sales_payment_transaction`;
TRUNCATE `sales_order_aggregated_created`; 
TRUNCATE `sales_order_tax`;
TRUNCATE `sales_order_tax_item`;
TRUNCATE `sendfriend_log`; 
TRUNCATE `tag`; 
TRUNCATE `tag_relation`; 
TRUNCATE `tag_summary`; 
TRUNCATE `wishlist`; 
TRUNCATE `log_quote`; 
TRUNCATE `report_event`; 
ALTER TABLE `sales_flat_creditmemo` AUTO_INCREMENT=1; 
ALTER TABLE `sales_flat_creditmemo_comment` AUTO_INCREMENT=1; 
ALTER TABLE `sales_flat_creditmemo_grid` AUTO_INCREMENT=1; 
ALTER TABLE `sales_flat_creditmemo_item` AUTO_INCREMENT=1; 
ALTER TABLE `sales_flat_invoice` AUTO_INCREMENT=1; 
ALTER TABLE `sales_flat_invoice_comment` AUTO_INCREMENT=1; 
ALTER TABLE `sales_flat_invoice_grid` AUTO_INCREMENT=1; 
ALTER TABLE `sales_flat_invoice_item` AUTO_INCREMENT=1; 
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_quote_payment` AUTO_INCREMENT=1; 
ALTER TABLE `sales_flat_quote_shipping_rate` AUTO_INCREMENT=1; 
ALTER TABLE `sales_flat_shipment` AUTO_INCREMENT=1; 
ALTER TABLE `sales_flat_shipment_comment` AUTO_INCREMENT=1; 
ALTER TABLE `sales_flat_shipment_grid` AUTO_INCREMENT=1; 
ALTER TABLE `sales_flat_shipment_item` AUTO_INCREMENT=1; 
ALTER TABLE `sales_flat_shipment_track` AUTO_INCREMENT=1; 
ALTER TABLE `sales_invoiced_aggregated` AUTO_INCREMENT=1; 
ALTER TABLE `sales_invoiced_aggregated_order` AUTO_INCREMENT=1; 
ALTER TABLE `sales_payment_transaction` AUTO_INCREMENT=1; 
ALTER TABLE `sales_order_aggregated_created` AUTO_INCREMENT=1; 
ALTER TABLE `sales_order_tax` AUTO_INCREMENT=1; 
ALTER TABLE `sales_order_tax_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; 
SET FOREIGN_KEY_CHECKS=1;

You can use this function to delete attribute sets.

 $resource = Mage::getSingleton('core/resource');
$db_read = $resource->getConnection('core_read');
 
$attribute_sets = $db_read->fetchCol("SELECT attribute_set_id FROM " . $resource->getTableName("eav_attribute_set") . " WHERE attribute_set_id<> 4 AND entity_type_id=4");
foreach ($attribute_sets as $attribute_set_id) {
    try {
        Mage::getModel("eav/entity_attribute_set")->load($attribute_set_id)->delete();
    } catch (Exception $e) {
        echo $e->getMessage() . "\n";
    }
}

And look for this table to remove attribute

catalog_eav_attribute
eav_attribute
eav_attribute_set

Check eav_attribute column is_user_defined so you can get some idea.

For Magento 2, see this Gist.

You can just empty the whole database and Magento will run all its install/upgrade/data scripts again on the next pageload. This will "factory reset" Magento and will destroy all your changes.

A good habit is to create a module that contains all your basic store settings inside install/upgrade/data scripts. This has the benefit that these settings are stored in version control and all the different websites you have for the store (production, staging, user acceptance testing, etc.) will be kept up to date.

If there are multiple persons working on a site, we even create a new module for every setting group so the versions don't conflict when we merge code.

In your case, I would create a module that setups all the settings you want to keep. If you wipe the database, Magento will be completely clean AND including the settings you want!

You can have a look at the install/upgrade scripts of core Magento to see how Magento installs it's initial data/settings.

Prior to launching a new Magento eCommerce website, at development phase, you’ll always have to carry out testing and this will require creating test orders and customers to ensure that all processes function correctly and as you would expect.

This can often end up leaving a load of test data in the system which you won’t be wanting once the site is launched. Magento is notorious for inserting data in multiple database tables so we’ve provided the SQL script below that will cleanly delete all this data from your Magento database (and reset the increment counters for sales, invoices, customers and shipping). This has been tested and confirmed working on Magento versions from 1.4.0.1 to 1.9.0.1.

#Tested on Magento CE 1.4.1.1 - 1.9.0.1

SET FOREIGN_KEY_CHECKS=0;

##############################
# SALES RELATED TABLES
##############################
TRUNCATE `sales_flat_creditmemo`;
TRUNCATE `sales_flat_creditmemo_comment`;
TRUNCATE `sales_flat_creditmemo_grid`;
TRUNCATE `sales_flat_creditmemo_item`;
TRUNCATE `sales_flat_invoice`;
TRUNCATE `sales_flat_invoice_comment`;
TRUNCATE `sales_flat_invoice_grid`;
TRUNCATE `sales_flat_invoice_item`;
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_quote_payment`;
TRUNCATE `sales_flat_quote_shipping_rate`;
TRUNCATE `sales_flat_shipment`;
TRUNCATE `sales_flat_shipment_comment`;
TRUNCATE `sales_flat_shipment_grid`;
TRUNCATE `sales_flat_shipment_item`;
TRUNCATE `sales_flat_shipment_track`;
TRUNCATE `sales_invoiced_aggregated`;            # ??
TRUNCATE `sales_invoiced_aggregated_order`;        # ??
TRUNCATE `log_quote`;

ALTER TABLE `sales_flat_creditmemo_comment` AUTO_INCREMENT=1;
ALTER TABLE `sales_flat_creditmemo_grid` AUTO_INCREMENT=1;
ALTER TABLE `sales_flat_creditmemo_item` AUTO_INCREMENT=1;
ALTER TABLE `sales_flat_invoice` AUTO_INCREMENT=1;
ALTER TABLE `sales_flat_invoice_comment` AUTO_INCREMENT=1;
ALTER TABLE `sales_flat_invoice_grid` AUTO_INCREMENT=1;
ALTER TABLE `sales_flat_invoice_item` AUTO_INCREMENT=1;
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_quote_payment` AUTO_INCREMENT=1;
ALTER TABLE `sales_flat_quote_shipping_rate` AUTO_INCREMENT=1;
ALTER TABLE `sales_flat_shipment` AUTO_INCREMENT=1;
ALTER TABLE `sales_flat_shipment_comment` AUTO_INCREMENT=1;
ALTER TABLE `sales_flat_shipment_grid` AUTO_INCREMENT=1;
ALTER TABLE `sales_flat_shipment_item` AUTO_INCREMENT=1;
ALTER TABLE `sales_flat_shipment_track` AUTO_INCREMENT=1;
ALTER TABLE `sales_invoiced_aggregated` AUTO_INCREMENT=1;
ALTER TABLE `sales_invoiced_aggregated_order` AUTO_INCREMENT=1;
ALTER TABLE `log_quote` AUTO_INCREMENT=1;

#########################################
# DOWNLOADABLE PURCHASED
#########################################
TRUNCATE `downloadable_link_purchased`;
TRUNCATE `downloadable_link_purchased_item`;

ALTER TABLE `downloadable_link_purchased` AUTO_INCREMENT=1;
ALTER TABLE `downloadable_link_purchased_item` AUTO_INCREMENT=1;

#########################################
# RESET ID COUNTERS
#########################################
TRUNCATE `eav_entity_store`;
ALTER TABLE  `eav_entity_store` AUTO_INCREMENT=1;


##############################
# CUSTOMER RELATED TABLES
##############################
TRUNCATE `customer_address_entity`;
TRUNCATE `customer_address_entity_datetime`;
TRUNCATE `customer_address_entity_decimal`;
TRUNCATE `customer_address_entity_int`;
TRUNCATE `customer_address_entity_text`;
TRUNCATE `customer_address_entity_varchar`;
TRUNCATE `customer_entity`;
TRUNCATE `customer_entity_datetime`;
TRUNCATE `customer_entity_decimal`;
TRUNCATE `customer_entity_int`;
TRUNCATE `customer_entity_text`;
TRUNCATE `customer_entity_varchar`;
TRUNCATE `tag`;
TRUNCATE `tag_relation`;
TRUNCATE `tag_summary`;
TRUNCATE `tag_properties`;            ## CHECK ME
TRUNCATE `wishlist`;
TRUNCATE `log_customer`;

ALTER TABLE `customer_address_entity` AUTO_INCREMENT=1;
ALTER TABLE `customer_address_entity_datetime` AUTO_INCREMENT=1;
ALTER TABLE `customer_address_entity_decimal` AUTO_INCREMENT=1;
ALTER TABLE `customer_address_entity_int` AUTO_INCREMENT=1;
ALTER TABLE `customer_address_entity_text` AUTO_INCREMENT=1;
ALTER TABLE `customer_address_entity_varchar` AUTO_INCREMENT=1;
ALTER TABLE `customer_entity` AUTO_INCREMENT=1;
ALTER TABLE `customer_entity_datetime` AUTO_INCREMENT=1;
ALTER TABLE `customer_entity_decimal` AUTO_INCREMENT=1;
ALTER TABLE `customer_entity_int` AUTO_INCREMENT=1;
ALTER TABLE `customer_entity_text` AUTO_INCREMENT=1;
ALTER TABLE `customer_entity_varchar` 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 `tag_properties` AUTO_INCREMENT=1;
ALTER TABLE `wishlist` AUTO_INCREMENT=1;
ALTER TABLE `log_customer` AUTO_INCREMENT=1;


##############################
# ADDITIONAL LOGS
##############################
TRUNCATE `log_url`;
TRUNCATE `log_url_info`;
TRUNCATE `log_visitor`;
TRUNCATE `log_visitor_info`;
TRUNCATE `report_event`;
TRUNCATE `report_viewed_product_index`;
TRUNCATE `sendfriend_log`;
### ??? TRUNCATE `log_summary`

ALTER TABLE `log_url` AUTO_INCREMENT=1;
ALTER TABLE `log_url_info` AUTO_INCREMENT=1;
ALTER TABLE `log_visitor` AUTO_INCREMENT=1;
ALTER TABLE `log_visitor_info` AUTO_INCREMENT=1;
ALTER TABLE `report_event` AUTO_INCREMENT=1;
ALTER TABLE `report_viewed_product_index` AUTO_INCREMENT=1;
ALTER TABLE `sendfriend_log` AUTO_INCREMENT=1;
### ??? ALTER TABLE `log_summary` AUTO_INCREMENT=1;

SET FOREIGN_KEY_CHECKS=1;