mysql - MySQL 查询数据库大小

Question

是否有可用于确定 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，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 ;

或者有了这个，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 ;

Answer 2

尝试：

SELECT table_schema, sum(data_length + index_length) FROM information_schema.TABLES GROUP BY table_schema;

Answer 3

SELECT table_schema "DB Name", 
       Round(Sum(data_length + index_length) / 1024 / 1024, 1) "DB Size in MB" 
FROM   information_schema.tables 
GROUP  BY table_schema;