Sometimes it is really useful to know how large a certain database table has become. With the following SQL statement you get a list of all tables of the currently connected database with their rounded size in MB:
SELECT table_name AS "Table", round(((data_length + index_length) / 1024 / 1024), 2) "Size in MB" FROM information_schema.TABLES ORDER BY (data_length + index_length) DESC;
This query selects all tables from all connected databases. If you want to select a certain one, you can add a where-clause like that:
WHERE table_schema = "$DBNAME"
And if you need only the size of a single table, you can take this where clause:
WHERE table_name = "$TABLENAME"
And if you need the all over size of your database, you can use the following query:
SELECT SUM(round(((data_length + index_length) / 1024 / 1024), 2)) AS "Overall size in MB" FROM information_schema.TABLES;