How to know database name and schema name by providing package name?

Question

Hi,
Could someonw will help me to get database name and schema name by providing package name ?
I have used the query : select * from all_objects where object_name='Package_name'; but it simply returns schema name where as i need DB name and username.
--Prajakta

Answer 1

but it simply returns schema name where as i need DB name and username.
i want to retrive the DB name for package name
Based on your questions, I wonder if you are used to working in SQL Server? (The server, database, and schema are part of the 4-part  name of an object, independent of any user.)
In SQL Server, schema and username are two separate physical concepts.  "Schema" is purely logical in Oracle: a user which owns objects is often called a "schema".
In Oracle, "database" is roughly equivalent to the SQL Server concept  "server" (what you log in to).  It is not part of the naming path to a specific object  (unless there is a database link involved, but there is no indication that's what you have here).  In Oracle you connect to an Instance (or Service) and people often call this the "database", but there is a fine semantic distinction there (separate topic). 
Once connected in Oracle, you fully-qualify an object by only a 2-part owner and object name (possibly 3-part if a database link is involved user.object@link).
12c added another wrinkle to all of this, but I'll assume this question was more basic than that, because you likely would have mentioned if this was a 12c question.