查询mysql数据库的容量和指定库中表的大小

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1.查询指定数据库容量的大小

select concat(round(sum(data_length/1024/1024),2),'mb') as data from tables where table_schema='bike_order';

2.查询指定库中指定表的大小

select concat(round(sum(data_length/1024/1024),2),'mb') as data from tables where table_schema='baojia_bike' and table_name='bike';