使用如下脚本就可以统计并展示
SELECT table_schema as '数据库', sum(table_rows) as '记录数', sum(truncate(data_length/1024/1024, 2)) as '数据容量(MB)', sum(truncate(index_length/1024/1024, 2)) as '索引容量(MB)', sum(truncate(DATA_FREE/1024/1024, 2)) as '碎片占用(MB)' from information_schema.tables group by table_schema order by sum(data_length) desc, sum(index_length) desc;