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 data_length desc, index_length desc;

3. 查看指定数据库容量大小

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
 
where table_schema='mysql';

4. 查看指定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
 
where table_schema='crm_mycomm' -- 库名
 
order by data_length desc, index_length desc;