MySQL统计数据库表大小

1、统计指定数据库大小：

SELECT 
	TABLE_SCHEMA 
	,CONCAT(ROUND(SUM(DATA_LENGTH/1024/1024),2),'M') AS 'DATA_LENGTH_MB'
	,CONCAT(ROUND(SUM(INDEX_LENGTH/1024/1024),2),'M') AS 'INDEX_LENGTH_MB'
	,CONCAT(ROUND(SUM(DATA_LENGTH/1024/1024)+SUM(INDEX_LENGTH/1024/1024),2),'M') AS 'TOTAL_LENGTH_MB'
FROM information_schema.tables 
WHERE table_schema='scpnf';

2、查询指定数据库下各表大小

select 
	 t.`TABLE_SCHEMA` as '数据库名称'
	,t.`TABLE_NAME` as '表名称'
	,CONCAT(ROUND(data_length/1024/1024,2),'M') as '数据大小(MB)'
	,CONCAT(ROUND(index_length/1024/1024,2),'M')  as '索引大小(MB)'
from `TABLES` t
where  t.`TABLE_SCHEMA` = 'scpnf'
order by t.`DATA_LENGTH` desc