查看mysql的数据大小

这一句是查询整个库的大小

select sum(A) '所有库MB' From(
SELECT table_schema "Data Base Name",
sum( data_length + index_length ) / 1024 / 1024 "A"
FROM information_schema.TABLES
GROUP BY table_schema)t 

这一句是显示所有库的大小,下面代码别改直接跑即可

SELECT table_schema "数据库名称",
sum( data_length + index_length ) / 1024 / 1024 "表的大小"
FROM information_schema.TABLES
GROUP BY table_schema

参考资料

https://blog.csdn.net/a87768092/article/details/89916553