MySQL

Create MySQL database with character set and collate:

CREATE DATABASE mydb
 DEFAULT CHARACTER SET utf8
 DEFAULT COLLATE utf8_general_ci;

Show Database sizes:

SELECT table_schema AS "Database", 
       Round(Sum(data_length + index_length) / 1024 / 1024 / 1024, 1) AS "Size in GB" 
FROM information_schema.tables 
GROUP BY table_schema

Show Table sizes:

SELECT
  TABLE_SCHEMA AS `Database`,
  TABLE_NAME AS `Table`,
  ROUND((DATA_LENGTH + INDEX_LENGTH) / 1024 / 1024) AS `Size (MB)`
FROM
  information_schema.TABLES
ORDER BY
  (DATA_LENGTH + INDEX_LENGTH)
DESC;