查询所有数据库占用磁盘空间大小的SQL语句: 代码如下:select TABLE_SCHEMA, concat(truncate(sum(data_length)/1024/1024,2),’ MB’) as data_size,concat(truncate(sum(index_length)/1024/1024,2),’MB’) as index_sizefrom information_schema.tablesgroup by TABLE_SCHEMAorder by data_length desc; 查询单个库中所有表磁盘占用大小的SQL语句: 代码如下:select TABL