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Oracle 1z1-071 Exam Syllabus Topics:

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

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Oracle Database SQL Sample Questions (Q41-Q46):

NEW QUESTION # 41
Examine the commands used to create DEPARTMENT_DETAILS and COURSE_DETAILS:

You want to generate a report that shows all course IDs irrespective of whether they have corresponding department IDs or not but no department IDs if they do not have any courses.
Which SQL statement must you use?

A. SELECT c.course_id, d.department_id FROM course_details c FULL OUTER JOIN department_details d ON (c.department_id<>d. department_id)
B. SELECT c.course_id, d.department_id FROM course_details c FULL OUTER JOIN department_details d ON (c.department_id=d. department_id)
C. SELECT c.course_id, d.department_id FROM course_details c RIGHT OUTER JOIN
.department_details d ON (c.depatrment_id=d.department_id)
D. SELECT course_id, department_id, FROM department_details d RIGHT OUTER JOIN course_details c USING (department_id)

Answer: B

NEW QUESTION # 42
The CUSTOMERS table has the following structure:
You need to write a query that does the following tasks:
1. Display the first name and tax amount of the customers. Tax is 5% of their credit limit.
2. Only those customers whose income level has a value should be
considered.
3. Customers whose tax amount is null should not be considered.
Which statement accomplishes all the required tasks?

A. SELECT cust_first_name, cust_credit_limit * .05 AS TAX_AMOUNT FROM customers WHERE (cust_income_level,tax_amount) IS NOT NULL;
B. Which statement accomplishes all the required tasks? SELECT cust_first_name, cust_credit_limit
* .05 AS TAX_AMOUNT FROM customers WHERE cust_income_level IS NOT NULL AND tax_amount IS NOT NULL;
C. SELECT cust_first_name, cust_credit_limit * .05 AS TAX_AMOUNT FROM customers WHERE cust_income_level <> NULL AND tax_amount <> NULL;
D. SELECT cust_first_name, cust_credit_limit * .05 AS TAX_AMOUNT FROM customers WHERE cust_income_level IS NOT NULL AND cust_credit_limit IS NOT NULL;

Answer: D

NEW QUESTION # 43
Which three statements are true about a self join?

A. It can be an outer join.
B. The on clause must be used.
C. It must be an equijoin.
D. The on clause can be used.
E. It must be an inner join.
F. The query must use two different aliases for the table.

Answer: A,D,F

NEW QUESTION # 44
Which three are true about subqueries?

A. =ANY can only evaluate the argument against a subcjuery if it returns two or more values.
B. A subquery cannot be used in a FROM clause.
C. A subquery can be used in a WHERE clause.
D. A subquery cannot be used in the select list.
E. A subquery can be used in a HAVING clause.
F. < any returns true if the argument is less than the lowest value returned by the subquery.
G. <ANY returns true if the argument is less than the highest value returned by the subquery.

Answer: C,E,G

Explanation:
About the roles and behavior of subqueries in SQL:
* A. A subquery can be used in a WHERE clause: Subqueries are often used in WHERE clauses to filter rows based on a condition evaluated against a set of returned values.
* B. A subquery can be used in a HAVING clause: Similar to WHERE, subqueries can be used in HAVING clauses to filter groups based on aggregate conditions.
* D. <ANY returns true if the argument is less than the highest value returned by the subquery: The <ANY (or <SOME) operator compares a value to each value returned by a subquery and returns true if the comparison is true for any one of the returned values.
Incorrect options:
* C: =ANY evaluates true if the argument matches any single value returned by the subquery, irrespective of the number of values.
* E: A subquery can indeed be used in a FROM clause, known as a derived table or inline view.
* F: <ANY returns true if the argument is less than any of the values returned by the subquery, not necessarily the lowest.
* G: A subquery can be used in a SELECT list, particularly when the subquery is designed to return a single value (scalar subquery).

NEW QUESTION # 45
Examine the types and examples of relationships that follow:

Which option indicates correctly matched relationships? (Choose the best answer.)

A. 1-a, 2-b, 3-c, and 4-d
B. 1-d, 2-b, 3-a, and 4-c
C. 1-c, 2-a, 3-b, and 4-d
D. 1-c, 2-d, 3-a, and 4-b

Answer: A

NEW QUESTION # 46
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