Getting all the table name of the database and generating a Drop table query.

drop_table.sql

SET FOREIGN_KEY_CHECKS = 0;
SELECT GROUP_CONCAT(table_schema, '.', table_name) INTO @tables
  FROM information_schema.tables 
  WHERE table_schema = 'DBNAME' and table_type = 'Base Table';
SET @tables = CONCAT('DROP TABLE IF EXISTS ', @tables);
PREPARE stmt FROM @tables;
EXECUTE stmt;
DEALLOCATE PREPARE stmt;
SET FOREIGN_KEY_CHECKS = 1;