文刀三皮的博客-专注运维技术，记录实用的系统维护配置

方法一：SELECT table_schema AS 'DBname',
Round( Sum( data_length + index_length ) / 1024 / 1024, 3 ) AS 'Db Size (MB)',
Round( Sum( data_free ) / 1024 / 1024, 3 ) AS 'Free Space (MB)'
FROM information_schema.tables GROUP BY table_schema ;...