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Oracle Database 10g Administrator
Oracle Training Query data using case insensitive and accent insensitive searches
The database administrator of your company created a public synonym called HR for the
HUMAN_RESOURCES table of the GENERAL schema, because many users frequently use this table.
As a user of the database, you created a table called HR in your schema. What happens when you execute
this query?
SELECT *
FROM HR;
A. You obtain the results retrieved from the public synonym HR created by the database administrator.
B. You obtain the results retrieved from the HR table that belongs to your schema.
C. You get an error message because you cannot retrieve from a table that has the same name as a public
synonym.
D. You obtain the results retrieved from both the public synonym HR and the HR table that belongs to your
schema, as a Cartesian product.
E. You obtain the results retrieved from both the public synonym HR and the HR table that belongs to your
schema, as a FULL JOIN.
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Answer: B
Explanation:
By executing this query you will extract data from the HR table in your own schema, it will not work with HR
synonym for the HUMAN_RESOURCES table of the GENERAL schema.
Incorrect Answers
A: The results will be retrieved from the table in your own schema, not from the GENERAL schema, using
synonym HR.
C: There is no error: data from the table in your own schema will be retrieved by this query.
D: This query will not generate Cartesian product from both tables.
E: This query will not retrieve data from both tables as a FULL JOIN.
OCP Introduction to Oracle 9i: SQL Exam Guide, Jason Couchman, p. 331-335
Chapter 7: Creating Other Database Objects in Oracle