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Oracle Introduction to Oracle9i: SQL Sample Questions:

1. Management has asked you to calculate the value 12*salary* commission_pct for all the employees in the EMP table. The EMP table contains these columns:

Which statement ensures that a value is displayed in the calculated columns for all employees?

A) SELECT last_name, 12*salary* commission_pct FROM emp;
B) SELECT last_name, 12*salary*(decode(commission_pct,0)) FROM emp;
C) SELECT last_name, 12*salary*(nvl(commission_pct,0)) FROM emp;
D) SELECT last_name, 12*salary* (commission_pct,0) FROM emp;

2. Evaluate the SQL statement:
SELECT ROUND (TRUNC(MOD(1600,10),-1),2)
FROM dual;
What will be displayed?

A) An error statement
B) 1
C) 0
D) 0.00

3. Which three are true? (Choose three.)

A) A MERGE statement can be used to insert new rows into a table.
B) A MERGE statement replaces the data of one table with that of another.
C) A MERGE statement is used to merge the data of one table with data from another.
D) A MERGE statement can be used to update existing rows in a table.

4. Which object privileges can be granted on a view?

A) DELETE, INSERT,SELECT
B) ALTER, DELETE, INSERT, SELECT
C) none
D) DELETE, INSERT, SELECT, UPDATE

5. The user Sue issues this SQL statement:
GRANT SELECT ON sue.EMP TO alice WITH GRANT OPTION;
The user Alice issues this SQL statement:
GRANT SELECT ON sue.EMP TO reena WITH GRANT OPTION;
The user Reena issues this SQL statement:
GRANT SELECT ON sue.EMP TO timber;
The user Sue issues this SQL statement:
REVOKE select on sue.EMP FROM alice;
For which users does the revoke command revoke SELECT privileges on the SUE.EMP table?

A) Alice, Reena, and Timber
B) Sue, Alice, Reena, and Timber
C) Alice only
D) Alice and Reena

Solutions: