Get the size of all tables in a MySQL DB #MYSQL

mysql_get_all_table_size.sql

SELECT table_name AS "Tables", 
  round(((data_length + index_length) / 1024 / 1024), 2) "Size in MB" 
FROM information_schema.TABLES 
WHERE table_schema = "$DB_NAME"
ORDER BY (data_length + index_length) DESC;