Did you ever find it hard to drop all your tables in your MySQL database?  You can generate statement like this: DROP TABLE t1, t2, t3, ... and then use prepared statements to execute it as shown in below given query

SET FOREIGN_KEY_CHECKS = 0; 
SET @tables = NULL;
SELECT GROUP_CONCAT(table_schema, '.', table_name) INTO @tables
FROM information_schema.tables 
WHERE table_schema = 'database_name'; -- specify DB name here.
SET @tables = CONCAT('DROP TABLE ', @tables);
PREPARE stmt FROM @tables;
EXECUTE stmt;
DEALLOCATE PREPARE stmt;
SET FOREIGN_KEY_CHECKS = 1;