Connect to other schma in same database ?

Question

Hi guy's ,
im in database AAA it has 3 schema's x , y, z , i loged in to x schema and querying the objects in same schema,
i requried to query other schema objects in x schema itself, i do know the passwords of them .
the table im querying is select * from all_synonyms.
i just wnt to write union of select * from all_synonyms in x, y,z from x schema , is it possible ?
thnx
raj

Answer 1

Dear infant_raj!
SELECT *
FROM   all_synonyms;ALL_SYNONYMS describes the synonyms accessible to the current user. The following criteria determine the list of synonyms that ALL_SYNONYMS shows:
* All private synonyms owned by the logged-in user, even if the base object pointed to is not accessible.
* All public synonyms, even if the base object pointed to is not accessible.
* All private synonyms owned by a different user, where the ultimate base object pointed to by that synonym or by any chain of nested synonyms, is
know to be accessible because of a grant to the logged-in user, or a grant to a role in effect for this session.
* If the current session has any of the following privileges, then all synonyms that point directly to local objects are shown because it is assumed that the
session can access those objects:
o LOCK ANY TABLE
o SELECT ANY TABLE
o INSERT ANY TABLE
o UPDATE ANY TABLE
o DELETE ANY TABLE
Synonyms that point to remote objects are excluded because the system privileges just listed do not automatically convey access to those remote objects.
Also, if the synonyms point to objects other than tables and views (such as sequences, PL/SQL procedures, and so on) then this rule may show synonyms
that ultimately resolve to objects that this session cannot access.
* All private synonyms owned by a different user, where the synonym is via a database link, are excluded.
Yours sincerely
Florian W.