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Oracle 1z1-071 Exam Syllabus Topics:

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

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Oracle Database SQL Sample Questions (Q358-Q363):

NEW QUESTION # 358
Which three are true about multitable INSERTstatements? (Choose three.)

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

Answer: A,D,E

Explanation:
Explanation/Reference: https://www.akadia.com/services/ora_multitable_insert.html

NEW QUESTION # 359
Examine these two queries and their output:
SELECT deptno, dname FROM dept;

SELECT ename, job, deptno FROM emp ORDER BY deptno;

Now examine this query:
SELECT ename, dname
FROM emp CROSS JOIN dept WHERE job = 'MANAGER'
AND dept.deptno IN (10, 20) ;

A. 0
B. 1
C. 2
D. 3

Answer: A

Explanation:
In a CROSS JOIN (also known as a Cartesian join), each row from the first table (emp) is joined to every row of the second table (dept). When we apply the filter for job = 'MANAGER' and dept.deptno IN (10, 20), we are restricting the results to managers in departments 10 and 20.
From the given data:
* There are 2 managers in department 10 (CLARK and KING).
* There is 1 manager in department 20 (JONES).
With a cross join, each of these emp records will join with each dept record where deptno is 10 or 20. Since there are two departments (10 and 20) in the dept table, each employee will match with two departments.
Therefore, the result set will be:
* CLARK with accounting (dept 10) and research (dept 20)
* KING with accounting (dept 10) and research (dept 20)
* JONES with accounting (dept 10) and research (dept 20)
That gives us a total of 6 rows, which means the correct answer is B: 6.

NEW QUESTION # 360
You execute this command:

Which two are true?

A. A ROLLBACK statement can be used to retrieve the deleted data.
B. It retains the integrity constraints defined on the table.
C. It retains the indexes defined on the table.
D. A FLASHBACK TABLE statement can be used to retrieve the deleted data.
E. It drops any triggers defined on the table.
F. It always retains the space used by the removed rows.

Answer: B,C

NEW QUESTION # 361
Which three statements are true about performing Data Manipulation Language (DML) operations on a view In an Oracle Database?

A. Views cannot be used to query rows from an underlying table if the table has a PRIPOARY KEY and the PRIMARY KEY columns are not referenced in the defining query of the view.
B. Insert statements can always be done on a table through a view.
C. Views cannot be used to add on modify rows in an underlying table if the defining query of the view contains aggregating functions.
D. Views cannot be used to add or modify rows in an underlying table if the defining query of the view contains the DISTINCT keyword.
E. Views cannot be used to add rows to an underlying table if the table has columns with NOT NULL constraints lacking default values which are not referenced in the defining query of the view.
F. The WITH CHECK clause has no effect when deleting rows from the underlying table through the view.

Answer: C,D,E

NEW QUESTION # 362
Examine the description of the ENPLYEES table:

Which two queries return all rows for employees whose salary is greater than the average salary in their department?

A. SELECT
FROM employees
WHERE salary > AVG (salary) OVER (PARTITION BY department _ id);
B. SELECT"
FROM employees e1
WHERE salary >!
SELECT AVG (salary)
FROM employees e2
WHERE e1. Department _id = e2, department_ id
C. SELECT"
FROM employees
WHERE salary >
( SELECT AVG
(salary) FROM
employees
D. SELECT "
FROM employees
WHERE salary > ANY
SELECT AVG (salary)
EROM employees
GROUP BY department_ id);
E. SELECT.
FROM
SELECT e.", AVG (salary) OVER (PARTITION BY department id) avg_ sal
FROM employees e
WHERE salary > avg_ sal;

Answer: A,B

Explanation:
GROUP BY department _ id
Explanation:
To return all rows for employees whose salary is greater than the average salary in their department, you would use either a subquery or an analytic function:
Option B:
SELECT ... FROM employees WHERE salary > AVG(salary) OVER (PARTITION BY department_id); This uses the window function AVG with PARTITION BY to calculate the average salary per department, and it compares each employee's salary to this average.
Option C:
SELECT ... FROM employees e1 WHERE salary > (SELECT AVG(salary) FROM employees e2 WHERE e1.department_id = e2.department_id); This correlated subquery compares each employee's salary to the average salary in their department using a subquery to calculate the average salary for that department.
Options A, D, and E are incorrect because:
Option A: The use of ANY with the subquery does not ensure comparison with the average salary of their respective department.
Option D: This is syntactically incorrect; the subquery alias avg_sal is not accessible outside the subquery.
Option E: The subquery does not correlate with the outer query to ensure that each employee's salary is compared to the average salary of their respective department.

NEW QUESTION # 363
......

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