MySql — know your DB size in a simple query from the MySql command line

DB size :

SELECT table_schema "Data Base Name",
    sum( data_length + index_length ) / 1024 / 1024 "Data Base Size in MB",
    sum( data_free )/ 1024 / 1024 "Free Space in MB"
FROM information_schema.TABLES
GROUP BY table_schema ;

specific DB each table size:

SELECT
 table_schema as `Database`,
 table_name AS `Table`,
 round(((data_length + index_length) / 1024 / 1024), 2) `Size in MB`
FROM information_schema.TABLES
where table_schema = {your schema name}
ORDER BY (data_length + index_length) DESC