dropDatabase.sql

use `dbName`; --your db name here
SET FOREIGN_KEY_CHECKS = 0; 
SET @tables = NULL;
SET GROUP_CONCAT_MAX_LEN=32768;

SELECT GROUP_CONCAT('`', table_schema, '`.`', table_name, '`') INTO @tables
FROM   information_schema.tables 
WHERE  table_schema = (SELECT DATABASE());
SELECT IFNULL(@tables, '') INTO @tables;

SET        @tables = CONCAT('DROP TABLE IF EXISTS ', @tables);
PREPARE    stmt FROM @tables;
EXECUTE    stmt;
DEALLOCATE PREPARE stmt;
SET        FOREIGN_KEY_CHECKS = 1;