【MySQL】数据库和数据表的数据量大小统计查询

select
concat(round(sum(DATA_LENGTH/1024/1024),2),‘MB‘) as ALL_DB_DATA_SIZE,
concat(round(sum(INDEX_LENGTH/1024/1024),2),‘MB‘) as ALL_DB_INDEX_SIZE,
concat(round(sum((DATA_LENGTH + INDEX_LENGTH)/1024/1024),2),‘MB‘) as ALL_DB_TOTAL_SIZE
from information_schema.TABLES;

select
table_schema as DB_NAME,
concat(round(sum(DATA_LENGTH/1024/1024),2),‘MB‘) as DB_DATA_SIZE,
concat(round(sum(INDEX_LENGTH/1024/1024),2),‘MB‘) as DB_INDEX_SIZE,
concat(round(sum((DATA_LENGTH + INDEX_LENGTH)/1024/1024),2),‘MB‘) as DB_TOTAL_SIZE
from information_schema.TABLES
group by table_schema
order by sum(DATA_LENGTH + INDEX_LENGTH) desc ;

select
table_name as TABLE_NAME,
table_rows AS ROW_NUM,
concat(round(DATA_LENGTH/1024/1024,2),‘MB‘) as TABLE_DATA_SIZE,
concat(round(INDEX_LENGTH/1024/1024,2),‘MB‘) as TABLE_INDEX_SIZE,
concat(round((DATA_LENGTH + INDEX_LENGTH)/1024/1024,2),‘MB‘) as TABLE_TOTAL_SIZE
from information_schema.TABLES
where table_schema=‘lei_user‘
order by (DATA_LENGTH + INDEX_LENGTH) desc;