use master
go
create table LocalTable (testcolumn nVarChar(255))
go
INSERT INTO LocalTable SELECT 'This data is in master!'
go
create proc sp_test as
select db_name() AS DBNameFromFunction, 
	(select count(*) from sysobjects) AS ObjectCountFromSystemView, 
	(SELECT TOP 1 testcolumn FROM LocalTable) AS DBNameFromLocalObject
go
create database testdb
go
use testdb
go
create table LocalTable (testcolumn nVarChar(255))
go
INSERT INTO LocalTable SELECT 'This data is in testdb!'
go
sp_test
go
use master
go
sp_test
go
use master
go
drop database testdb
drop proc sp_test
drop table LocalTable
go

use master
go
create database testdb
go
create proc sp_test as
select db_name()
go
sp_test
go
use testdb
go
sp_test
go
use master
go
drop database testdb
drop proc sp_test
go