SET GROUP_CONCAT_MAX_LEN=32768;
SET @tables = NULL;

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

SELECT IFNULL(@tables,'dummy') INTO @tables;

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


/*BORRAR TODAS LAS TABLAS DE LA BASE DE DATOS*/