代码如下:create database MyDb on ( name=mainDb, filename=’c:\MyDb\mainDb.mdf’, size=10, maxsize=100, filegrowth=4 ), ( name=secondDb, filename=’C:\MyDb\secondDb.ndf’, size=15, maxsize=28, filegrowth=2 ) log on ( name=log_Db, filename=’C:\MyDb\log_Db’, si