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Oracle Database SQL Sample Questions (Q86-Q91):
NEW QUESTION # 86
Evaluate the following ALTER TABLEstatement:
ALTER TABLE orders
SET UNUSED (order_date);
Which statement is true?
- A. The ORDER_DATEcolumn must be empty for the ALTER TABLEcommand to execute successfully.
- B. The DESCRIBEcommand would still display the ORDER_DATEcolumn.
- C. ROLLBACKcan be used to get back the ORDER_DATEcolumn in the ORDERStable.
- D. After executing the ALTER TABLEcommand, you can add a new column called ORDER_DATEto the ORDERStable.
Answer: D
NEW QUESTION # 87
Examine the description of the ORDERS table:
Which three statements execute successfully?
- A. SELECT * FROM orders ORDER BY order_ id
INTERSEOT
SELECT * FROM invoices ORDER BY invoice_ id;
- B. SELECT * FROM orders
MINUS
SELECT * FROM INVOICES ORDER BY 1
- C. SELECT order_ id, order_ data FROM orders
UNION ALL
SELECT invoice_ id, invoice_ data FROM invoices ORDER BY order_ id;
- D. SELECE order _id, order _ date FRON orders
LNTERSECT
SELECT invoice_ id, invoice_ id, order_ date FROM orders
- E. SELECT * FROM orders ORDER BY order_ id
UNION
SELECT * FROM invoices;
- F. SELECT order_ id, invoice_ data order_ date FROM orders
MINUS
SELECT invoice_ id, invoice_ data FROM invoices ORDER BY invoice_ id;
- G. (SELECT * FROM orders
UNION ALL
SELECT* FROM invoices) ORDER BY order _id;
Answer: B,C,G
NEW QUESTION # 88
Which three are true about granting object privileges on tables, views, and sequences?
- A. REFERENCES can be granted only on tables and views.
- B. SELECT can be granted only on tables and views.
- C. DELETE can be granted on tables, views, and sequences.
- D. INSERT can be granted on tables, views, and sequences.
- E. ALTER can be granted only on tables and sequences.
- F. UPDATE can be granted only on tables and views.
Answer: A,B,E
Explanation:
In Oracle Database, object privileges are rights to perform a particular action on a specific object in the database. Here's why the other options are incorrect:
A . UPDATE can be granted on tables, views, and materialized views, but not sequences. B. DELETE cannot be granted on sequences because sequences do not store data that can be deleted. D. INSERT cannot be granted on sequences; sequences are used to generate numbers, not to be inserted into directly. C. REFERENCES allows the grantee to create a foreign key that references the table or the columns of the table. It is applicable only to tables and views. E. SELECT can indeed only be granted on tables and views (including materialized views). F. ALTER is an object privilege that can be granted on tables and sequences but not views.
For more details, one may refer to the Oracle Database SQL Language Reference documentation, which specifies the types of object privileges and the objects they apply to.
NEW QUESTION # 89
Examine the structure of the PROGRAMS table:
Which two SQL statements would execute successfully? (Choose two.)
- A. SELECT NVL(MONTHS_BETWEEN(start_date,end_date),'Ongoing')FROM programs;
- B. SELECT TO_DATE(NVL(SYSDATE-END_DATE,SYSDATE))FROM programs;
- C. SELECT NVL(TO_CHAR(MONTHS_BETWEEN(start-date,end_date)),'Ongoing')FROM programs;
- D. SELECT NVL(ADD_MONTHS(END_DATE,1)SYSDATE)FROM programs;
Answer: B,C
NEW QUESTION # 90
Which two are true about the data dictionary?
- A. All user actions are recorded in the data dictionary.
- B. Base tables in the data dictionary have the prefix DBA_.
- C. The SYSuser owns all base tables and user-accessible views in the data dictionary.
- D. The data dictionary is constantly updated to reflect changes to database objects, permissions, and data.
- E. All users have permissions to access all information in the data dictionary by default.
Answer: B,C
Explanation:
Explanation/Reference: https://docs.oracle.com/cd/B28359_01/server.111/b28318/datadict.htm#CNCPT1215
NEW QUESTION # 91
......
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