查询所有数据库的总大小

mysql> use information_schema;

mysql> select concat(round(sum(DATA_LENGTH/1024/1024),2),‘MB‘) as data from TABLES;

统计所有库数据量（常用）

说明：每张表数据量=AVG_ROW_LENGTH*TABLE_ROWS+INDEX_LENGTH

?

SELECT

SUM(AVG_ROW_LENGTH*TABLE_ROWS+INDEX_LENGTH)/1024/1024 AS total_mb

FROM information_schema.TABLES;

统计每个库的大小（常用）

SELECT

table_schema,SUM(AVG_ROW_LENGTH*TABLE_ROWS+INDEX_LENGTH)/1024/1024 AS total_mb

FROM information_schema.TABLES group by table_schema;

查看指定数据库(ORM库)大小

mysql> use information_schema;

mysql> select concat(round(sum(DATA_LENGTH/1024/1024),2),‘MB‘) as data from TABLES where table_schema=‘ORM‘;

查看所有库各容量大小

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)‘

from information_schema.tables

group by table_schema

order by sum(data_length) desc, sum(index_length) desc;

查看所有库各表容量大小

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

order by data_length desc, index_length desc;

查看指定库容量大小

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)‘

from information_schema.tables

where table_schema=‘mysql‘;

查看指定库各表容量大小

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=‘mysql‘

order by data_length desc, index_length desc;

数据库容量信息查看语句

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