Oracle 9i Administration Certification Training OCP

Retrieve rows from two tables by using an equi join

Your company wants to get each employee a $100 salary
increment. You need to evaluate the results, from the EMP table prior to actual
modification. If you do not want to store the result in the database which statement
is valid?

A. You need to add a column to the EMP table.
B. You need to give the arithmetic expression that involves the salary increment in the set
clause of the update statement.
C. You need to give the arithmetic expression that involves the salary increment in the
select clause of the select statement.
D. You need to give the arithmetic expression that involves the salary increment in the
update clause of the select statement.
E. You need to give the arithmetic expression that involves the salary increment in the
display clause of the select statement.

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Answer: C

Explanation:
Answer C is correct because using of the SELECT clause of the SELECT statement
WILL NOT change data and will not store the result of operation in the database.
Incorrect Answers:
A: To evaluate results you DON'T NEED to add a column to the EMP table, this can be
done with SELECT statement only, without changing structure of table.
B: Usage of the SET clause of the UPDATE statement will cause data changes in the
database. So this answer is eliminated.
D: The UPDATE clause does not exist in the SELECT statement.
E: The DISPLAY clause does not exist in the SELECT statement.
Oracle 8, DBA Certification Exam Guide, Jason S. Couchman, p. 6-10
Chapter 1: Selecting Data from Oracle