How to delete customers in magento?

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;