how to truncate all table in mysql workbench

SELECT
    Concat('TRUNCATE TABLE ', TABLE_NAME)
FROM
    INFORMATION_SCHEMA.TABLES
WHERE
    table_schema = 'db_name';

SELECT Concat('TRUNCATE TABLE ',table_schema,'.',TABLE_NAME, ';') 
FROM INFORMATION_SCHEMA.TABLES where  table_schema in ('db1_name','db2_name');