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Oracle 1z0-071 Exam Syllabus Topics:

Section	Objectives
Relational Database Concepts	- Data types and database objects overview - Tables, rows, columns, and relational model basics
Data Manipulation and Schema Objects	- DDL operations 1. CREATE, ALTER, DROP tables and constraints - DML operations 1. INSERT, UPDATE, DELETE, MERGE
SQL Retrieval	- Joins and set operations 1. INNER, OUTER, CROSS joins 2. UNION, INTERSECT, MINUS - SELECT statements and filtering data 1. ORDER BY and row limiting 2. WHERE clause and conditions
SQL Functions	- Conversion and conditional functions 1. TO_CHAR, TO_NUMBER, CASE expressions - Single-row functions 1. Character, numeric, date functions
Subqueries and Advanced SQL	- Single-row and multi-row subqueries - Correlated subqueries and nested queries

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Oracle Database SQL Sample Questions (Q144-Q149):

NEW QUESTION # 144
Examine the description of the PRODUCTS table:

Which three queries use valid expressions?

A. SPLECT product_id, expiry_date * 2 FROM products;
B. SELECT product_id, (unit_price * 0.15 / (4.75 + 552.25)) FROM products;
C. SELECT ptoduct_id, (expiry_date-delivery_date) * 2 FROM products;
D. SELECT produet_id, unit_pricer, 5 "Discount",unit_price+surcharge-discount FROM products;
E. SELEGT product_id, unit_price, unit_price + surcharge FROM products;
F. SELECT product_id,unit_price || "Discount", unit_price + surcharge-discount FROM products;

Answer: B,C,E

Explanation:
B). SELECT product_id, (unit_price * 0.15 / (4.75 + 552.25)) FROM products; C. SELECT product_id, (expiry_date - delivery_date) * 2 FROM products; E. SELECT product_id, unit_price, unit_price + surcharge FROM products; Comprehensive and Detailed Explanation WITH all References:
A). This is invalid because "Discount" is a string literal and cannot be used without quotes in an arithmetic operation. Also, there is a typo in unit_pricer, and 'discount' is not a defined column in the table. B. This is valid. It shows a mathematical calculation with unit_price, which is of NUMBER type. Division and multiplication are valid operations on numbers. C. This is valid. The difference between two DATE values results in the number of days between them, and multiplying this value by a number is a valid operation. D.
This is invalid because expiry_date is of DATE type and cannot be multiplied by a number. Also, there's a typo: "SPLECT" should be "SELECT". E. This is valid. Both unit_price and surcharge are NUMBER types, and adding them together is a valid operation. F. This is invalid because concatenation operator || is used between a number (unit_price) and a string literal "Discount", which is not enclosed in single quotes, and
'discount' is not a defined column in the table.
In SQL, arithmetic operations on numbers and date arithmetic are valid expressions. Concatenation is also a valid expression when used correctly between string values or literals. Operations that involve date types should not include multiplication or division by numbers directly without a proper interval type in Oracle SQL.
These rules are detailed in the Oracle Database SQL Language Reference, where expressions, datatype precedence, and operations are defined.

NEW QUESTION # 145
View the Exhibit and examine the structure of the ORDER_ITEMS table.

Examine the following SQL statement:
SELECT order_id, product_id, unit_price
FROM order_items
WHERE unit_price =
(SELECT MAX(unit_price)
FROM order_items
GROUP BY order_id);
You want to display the PRODUCT_ID of the product that has the highest UNIT_PRICE per ORDER_ID.
What correction should be made in the above SQL statement to achieve this?

A. Replace = with the IN operator
B. Remove the GROUP BY clause from the subquery and place it in the main query
C. Replace = with the >ALL operator
D. Replace = with the >ANY operator

Answer: A

NEW QUESTION # 146
Examine the structure of the SHIPMENTS table:

You want to generate a report that displays the PO_ID and the penalty amount to be paid if the SHIPMENT_DATE is later than one month from the PO_DATE. The penalty is $20 per day.
Evaluate the following two queries:

Which statement is true regarding the above commands?

A. Only the first query executes successfully but gives a wrong result.
B. Only the first query executes successfully and gives the correct result.
C. Only the second query executes successfully and gives the correct result.
D. Only the second query executes successfully but gives a wrong result.
E. Both execute successfully and give correct results.

Answer: B

NEW QUESTION # 147
Which three are true about multiple INSERT statements?

A. They can be performed on views.
B. They can be performed on remote tables.
C. They can be performed on relational tables.
D. They can be performed on external tables using SQL*Loader.
E. They can be performed only by using a subquery.
F. They can insert each computed row into more than one table.

Answer: B,C,E

NEW QUESTION # 148
Examine this business rule:
Each student can work on multiple projects and earth project can have multiple students.
You must decide an Entity Relationship (ER) model for optional data storage and allow generating reports in this format:
STUDENT_ID FIRST_NAME LAST_NAME PROJECT_ID PROJECT_NAME PROJECT_TASK Which two statements are true?

A. The ER must have a many-to-many relationship between the STUDENTS and PROJECTS entities that must be resolved into 1-to-many relationships.
B. PROJECT_ID must be the primary key in the PROJECTS entity and foreign key in the STUDENTS entity.
C. The ER must have a 1-to-many relationship between the STUDENTS and PROJECTS entities.
D. STUDENT_ID must be the primary key in the STUDENTS entity and foreign key in the PROJECTS entity.
E. An associative table must be created with a composite key of STUDENT_ID and PROJECT_ID, which is the foreign key linked to the STUDENTS and PROJECTS entities.

Answer: A,E

NEW QUESTION # 149
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