1Z0-047 Exam Questions & Answers

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1Z0-047 Exam Questions & Answers

Vendor: Oracle

Certifications: Others Oracle Certifications

Exam Code: 1Z0-047

Exam Name: Oracle Database SQL Expert

Updated: Dec 14, 2021

Q&As: 260

Exam retired

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1Z0-047 Online Practice Questions and Answers

Questions 1

Which two statements are true regarding the EXISTS operator used in the correlated subqueries? (Choose two.)

A. The outer query stops evaluating the result set of the inner query when the first value is found.

B. It is used to test whether the values retrieved by the inner query exist in the result of the outer query.

C. It is used to test whether the values retrieved by the outer query exist in the result set of the inner query.

D. The outer query continues evaluating the result set of the inner query until all the values in the result set are processed.

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Questions 2

Which two statements are true regarding the execution of the correlated subqueries? (Choose two.)

A. The nested query executes after the outer query returns the row.

B. The nested query executes first and then the outer query executes.

C. The outer query executes only once for the result returned by the inner query.

D. Each row returned by the outer query is evaluated for the results returned by the inner query.

Show Answer
Questions 3

View the Exhibit and examine the description of the EMPLOYEES table.

You want to calculate the total remuneration for each employee. Total remuneration is the sum of the annual salary and the percentage commission earned for a year. Only a few employees earn commission.

Which SOL statement would you execute to get the desired output?

A. SELECTfirst_name, salary, salary*12+salary*commission_pct "Total" FROM EMPLOYEES;

B. SELECTfirst_name, salary, salary*12+NVL((salary*commission_pct), 0) "Total" FROM EMPLOYEES;

C. SELECTfirst_name, salary, salary*12 + NVL(salary, O)*commission_pct "Total" FROM EMPLOYEES;

D. SELECTfirst_name, salary, salary*12+ (salary*NVL2(commission_pct, salary,salary +commission_pct))"Total" FROM EMPLOYEES;

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