Database using spatial query method

1. With regard to space usage mysql query:

　　1.1 See all the disk space occupied by database size:

　　　　select concat(round(sum(DATA_LENGTH/1024/1024),2),'MB') as data from information_schema.TABLES

　　1.2 View size specified in the database library (udb) of:

　　select concat(round(sum(DATA_LENGTH/1024/1024),2),'MB') as data from information_schema.TABLES where table_schema='udb'