1.查看所有数据库容量大小

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

GROUP BY

table_schema

ORDER BY

sum( data_length ) DESC,

sum( index_length ) DESC;

2.查看所有数据库各表容量大小

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 table_schema,data_length desc, index_length desc;

3.查看指定数据库容量大小

例：查看mysql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';

4.查看指定数据库各表容量大小

例：查看mysql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;