MySQL 查询数据库大小

Question

是否有可以用来确定 MySQL 中数据库大小的查询或函数？如果不是，在 MySQL 中查找数据库大小的典型方法是什么？

我在谷歌上搜索并发现 SELECT CONCAT(sum(ROUND(((DATA_LENGTH + INDEX_LENGTH - DATA_FREE)/1024/1024),2)),"MB") AS Size FROM INFORMATION_SCHEMA.TABLES where TABLE_SCHEMA like ' %YOUR_DB_NAME%' ;

它返回一个我知道是 400MB 的数据库 474989023196466.25 MB!

Answer 1

试试这个查询:

SELECT table_schema AS "Data Base Name", 
sum( data_length + index_length ) / 1024 / 1024 AS "Data Base Size in MB" 
FROM information_schema.TABLES GROUP BY table_schema ;

或者用这个，如果你想 ROUND :

SELECT table_schema AS "Data Base Name", 
ROUND(SUM( data_length + index_length ) / 1024 / 1024, 2) AS "Data Base Size in MB" 
FROM information_schema.TABLES GROUP BY table_schema ;