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How to log into a schema without a password?
The Proxy authentication mechanism allows a user to login as their own user but land into a different schema without knowing the password for that user. For example the USER_A may want to create an object in the ORCL_DBA or want to use the privileges/roles of the ORCL_DBA user.
Can you log into an Oracle database without a password?
Oracle Database Security : Log into a Schema Without a Password! No, not everyone can. You need to have been granted specific privileges to be able to do that or the Oracle Database Security would be classified as non-existing.
Can a user connect to an oracle schema?
You can now connect through your own user but land in as the USER_A schema. you will have all the privileges which are available to USER_A. You can however limit the roles and privileges ORCL_DBA should get from the ones available to USER_A.
Can a certificate be used to connect to a database?
Instead of connecting to the database with username and password it is also possible to connect to the database via username and certificate. In this example we will use self signed certificates. A similar configuration is possible with trusted certificates.
Why do I need to create a schema in a dump file?
If your dump file set does not contain the metadata necessary to create a schema, or if you do not have privileges, then the target schema must be created before the import operation is performed. This is because the unprivileged dump files do not contain the necessary information for the import to create the schema automatically.
Can You remap a schema that does not already exist?
If the schema you are remapping to does not already exist, then the import operation creates it, provided that the dump file set contains the necessary CREATE USER metadata for the source schema, and provided that you are importing with enough privileges.
How to alter the schema of a user?
The alter session command merely places a user in a different schema making it easier to access the objects in this schema without having to qualify the object with the actual schema name. This method does not change the current user and also does not give any privileges that this new schema has. alter session set current_schema=USER_A;