查看mysql数据库大小

时间:2021-07-05 22:17:46

要想知道每个数据库的大小的话,步骤如下:

1、进入information_schema 数据库(存放了其他的数据库的信息)

use information_schema;

 

2、查询所有数据的大小:

select concat(round(sum(data_length/1024/1024),2),'MB') as data from tables;

 

3、查看指定数据库的大小:

比如查看数据库home的大小

select concat(round(sum(data_length/1024/1024),2),'MB') as data from tables where table_schema='home';

 

4、查看指定数据库的某个表的大小

比如查看数据库home中 members 表的大小

select concat(round(sum(data_length/1024/1024),2),'MB') as data from tables where table_schema='home' and table_name='members';

 

mysql查看当前所有的数据库和索引大小

select table_schema, concat(truncate(sum(data_length)/1024/1024,2),' mb') as data_size,
concat(truncate(sum(index_length)/1024/1024,2),'mb') as index_size
from information_schema.tables
group by table_schema
order by data_length desc;

 

mysql查看当前某个数据库和数据库下所有的表的大小

select table_name, concat(truncate(data_length/1024/1024,2),' mb') as data_size,
concat(truncate(index_length/1024/1024,2),' mb') as index_size
from information_schema.tables where table_schema = 'mysql'
group by table_name
order by data_length desc;