有关sql查询分析器运行sql的问题？

use master
GO
if exists(select [name] from sysdatabases where [name]='MediaDB')
drop database MediaDBCREATE DATABASE MediaDB
ON
( NAME = MediaDB,
   FILENAME = 'c:\MediaDB.mdf',
   SIZE = 10,
   MAXSIZE = 50,
   FILEGROWTH = 5 )
LOG ON
( NAME =MediaDB_log,
   FILENAME = 'c:\MediaDBlog.ldf',
   SIZE = 5MB,
   MAXSIZE = 25MB,
   FILEGROWTH = 5MB )
GO
use MediaDB