MySQL 查看数据库表容量大小

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

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;