get size of mysql database

 SELECT table_schema "DB Name",

        ROUND(SUM(data_length + index_length) / 1024 / 1024, 1) "DB Size in MB" 

FROM information_schema.tables 

GROUP BY table_schema; 

get the sizes of the tables of a MySQL database

 SELECT

  TABLE_NAME AS `Table`,

  ROUND((DATA_LENGTH + INDEX_LENGTH) / 1024 / 1024) AS `Size (MB)`

FROM

  information_schema.TABLES

WHERE

  TABLE_SCHEMA = "dbname"

ORDER BY

  (DATA_LENGTH + INDEX_LENGTH)

DESC;

Get record counts for all tables in MySQL database

SELECT table_name, table_rows

FROM INFORMATION_SCHEMA.TABLES 

WHERE TABLE_SCHEMA = YOUR SCHEMA;