查询MySQL数据库所占用大小

/*查询MySQL数据库里面的所有数据库各自占用大小*/

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;

/*查询MySQL数据库里面的单个数据库占用大小*/

SELECT CONCAT(TRUNCATE(SUM(data_length)/1024/1024,2),'MB') AS data_size,

CONCAT(TRUNCATE(SUM(max_data_length)/1024/1024,2),'MB') AS max_data_size,

CONCAT(TRUNCATE(SUM(data_free)/1024/1024,2),'MB') AS data_free,

CONCAT(TRUNCATE(SUM(index_length)/1024/1024,2),'MB') AS index_size

FROM information_schema.tables WHERE TABLE_SCHEMA = '数据库名';

/*查询MySQL数据库里面的单个数据库所有表各自占用大小*/

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 = '数据库名'

group by TABLE_NAME

order by data_length desc;

/*查询MySQL数据库里面的单个数据库指定表占用大小*/

SELECT CONCAT(TRUNCATE(SUM(data_length)/1024/1024,2),'MB') AS data_size,

CONCAT(TRUNCATE(SUM(max_data_length)/1024/1024,2),'MB') AS max_data_size,

CONCAT(TRUNCATE(SUM(data_free)/1024/1024,2),'MB') AS data_free,

CONCAT(TRUNCATE(SUM(index_length)/1024/1024,2),'MB') AS index_size

FROM information_schema.tables WHERE TABLE_NAME = '表名';