mysql使用记录相关

[查看mysql数据库大小]( https://cloud.tencent.com/developer/article/1525625#:~:text=use information_schema%3B %23一定要先进这个库，才能查询信息 2、查询所有数据的大小： select concat(round(sum(data_length ,%2F1024%2F1024%29%2C2%29%2C%27MB%27%29%20as%20data%20from%20tables%3B%203%E3%80%81%E6%9F%A5%E7%9C%8B%E6%8C%87%E5%AE%9A%E6%95%B0%E6%8D%AE%E5%BA%93%E7%9A%84%E5%A4%A7%E5%B0%8F%EF%BC%9A%20%E6%AF%94%E5%A6%82%E6%9F%A5%E7%9C%8B%E6%95%B0%E6%8D%AE%E5%BA%93test%E7%9A%84%E5%A4%A7%E5%B0%8F)