如何获取mysql数据库中每个表的大小？

1、查看每个库中表的大小，按大小排序

注意：表占用空间大小，包括 数据 和 索引

SELECT 
     table_schema as `Database`, 
     table_name AS `Table`, 
     round(((data_length + index_length) / 1024 / 1024), 2) `Size in MB` 
FROM information_schema.TABLES 
ORDER BY (data_length + index_length) DESC; 

查询结果

2、查看某个特定的库中，表的大小

SELECT 
     table_schema as `Database`, 
     table_name AS `Table`, 
     round(((data_length + index_length) / 1024 / 1024), 2) `Size in MB` 
FROM information_schema.TABLES 
WHERE table_schema = "iuap_data_datafusion"  # 替换为具体的库名
ORDER BY (data_length + index_length) DESC; 

查询结果