declare @dbname varchar(20),
        @NextMonth datetime,
        @Yeah varchar(4),
        @Month varchar(2)

    set @NextMonth = dateadd(month,1,getDate())
    set @Yeah = cast(year(@NextMonth) as varchar(4))
    select @Month = case when month(@NextMonth) >= 10 then cast(month(@NextMonth) as varchar(2)) else '0' + cast(month(@NextMonth) as varchar(2)) end
    set @dbname='post' + @Yeah + @Month

    declare @sql varchar(5000)
    set @sql ='
            IF NOT EXISTS(select * from sys.databases where name = ''' + @dbname +''')
            BEGIN
                CREATE DATABASE ' + @dbname + ' ON PRIMARY
                (
                    NAME = N''' + @dbname + ''',FILENAME = N''D:\Program Files\Microsoft SQL Server\MSSQL10.MSSQLSERVER\MSSQL\DATA\'+@dbname + '.mdf'',SIZE = 3072KB,FILEGROWTH = 1024KB
                )
                LOG ON
                (
                    NAME = N''' + @dbname + '_log'',FILENAME = N''D:\Program Files\Microsoft SQL Server\MSSQL10.MSSQLSERVER\MSSQL\DATA\'+@dbname + '_log.ldf'',SIZE = 1024KB,MAXSIZE = 2048MB,FILEGROWTH = 10240KB
                )
            END
    '

    exec (@sql)