查询数据库大小
select concat(round(sum(DATA_LENGTH/1024/1024),2), 'MB') as data from information_schema.TABLES where information_schema.TABLES.TABLE_SCHEMA='数据库的名称';
查询数据库表的大小以及索引大小，降序
select
table_schema as '数据库',
table_name as '表名',
table_rows as '记录数',
truncate(data_length/1024/1024, 2) as '数据容量(MB)',
truncate(index_length/1024/1024, 2) as '索引容量(MB)'
from information_schema.tables
where table_schema='idp4'
order by data_length desc, index_length desc;
