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Oracle 1z1-071 Exam Syllabus Topics:

Section	Objectives
Topic 1: SQL Functions	- Conversion and conditional functions 1. TO_CHAR, TO_NUMBER, CASE expressions - Single-row functions 1. Character, numeric, date functions
Topic 2: SQL Retrieval	- Joins and set operations 1. UNION, INTERSECT, MINUS 2. INNER, OUTER, CROSS joins - SELECT statements and filtering data 1. ORDER BY and row limiting 2. WHERE clause and conditions
Topic 3: Subqueries and Advanced SQL	- Correlated subqueries and nested queries - Single-row and multi-row subqueries
Topic 4: Data Manipulation and Schema Objects	- DML operations 1. INSERT, UPDATE, DELETE, MERGE - DDL operations 1. CREATE, ALTER, DROP tables and constraints
Topic 5: Relational Database Concepts	- Tables, rows, columns, and relational model basics - Data types and database objects overview

>> New 1z1-071 Exam Topics <<

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Oracle Database SQL Sample Questions (Q117-Q122):

NEW QUESTION # 117
View the Exhibit and examine the description for the SALES and CHANNELS tables.

You issued this SQL statement:

Which statement is true regarding the result? (Choose the best answer.)

A. The statement will execute and a new row will be inserted in the SALES table.
B. The statement will fail because the subquery in the VALUES clause is not enclosed within single quotation marks.
C. The statement will fail because a subquery cannot be used in a VALUES clause.
D. The statement will fail because the VALUES clause is not required with the subquery.

Answer: A

NEW QUESTION # 118
Which two statements are true about substitution variables?

A. A substitution variable can be used with any clause in a SELECT statement.
B. A substitution variable used to prompt for a column name must be endorsed in double quotation marks.
C. A substitution variable can be used only in a SELECT statement.
D. A substitution variable prefixed with & always prompts only once for a value in a session.
E. A substitution variable prefixed with 6 prompts only once for a value in a session unless is set to undefined in the session.
F. A substitution variable used to prompt for a column name must be endorsed in single quotation marks.

Answer: A,D

Explanation:
Substitution variables in Oracle are used to replace a value dynamically during the execution of SQL statements. The behavior of these variables is well-documented:
C . A substitution variable prefixed with & always prompts only once for a value in a session: This is true. In a session, when you use a single ampersand (&), SQL*Plus or SQL Developer will prompt for the value the first time the variable is encountered. The value for this variable will then be reused for the remainder of the session unless it is redefined.
D . A substitution variable can be used with any clause in a SELECT statement: Substitution variables can be placed in any part of a SQL statement, including the SELECT, WHERE, GROUP BY, ORDER BY, etc. They are not limited to any specific clause.
Reference:
Oracle SQL*Plus User's Guide and Reference, which discusses substitution variables.

NEW QUESTION # 119
Evaluate the following SQL statement:
SQL> SELECT cust_id, cust_last_name "Last Name" FROM customers WHERE country_id = 10 UNION
SELECT cust_id CUST_NO, cust_last_name
FROM customers
WHERE country_id = 30;
Which ORDER BY clause are valid for the above query? (Choose all that apply.)

A. ORDER BY CUST_NO
B. ORDER BY "Last Name"
C. ORDER BY "CUST_NO"
D. ORDER BY 2,1
E. ORDER BY 2,cust_id

Answer: B,D,E

Explanation:
Using the ORDER BY Clause in Set Operations
-The ORDER BY clause can appear only once at the end of the compound query.
-Component queries cannot have individual ORDER BY clauses.
-The ORDER BY clause recognizes only the columns of the first SELECT query.
-By default, the first column of the first SELECT query is used to sort the output in an ascending order.

NEW QUESTION # 120
View the Exhibit and examine the structure in the DEPARTMENTS tables. (Choose two.)

Examine this SQL statement:
SELECT department_id "DEPT_ID", department_name, 'b' FROM
departments
WHERE departments_id=90
UNION
SELECT department_id, department_name DEPT_NAME, 'a' FROM
departments
WHERE department_id=10
Which two ORDER BY clauses can be used to sort the output?

A. ORDER BY DEPT_NAME;
B. ORDER BY 'b';
C. ORDER BY 3;
D. ORDER BY DEPT_ID;

Answer: C,D

NEW QUESTION # 121
Examine the description of the EMPLOYERS table:

Examine these requirements:
Disable the manager ID and salary of the lowest paid employees for that manager.
Exclude anyone whose manager is not known.
Exclude any managers where the minimum salary is 6000 or less.
Sort the output by minimum salary with the highest salary shown first.
Which statement will do this?

A. SELECT manager_id, MIN(salary)
FROM employees
WHERE manager_id IS NOT NULL
AND MIN(salary) > 6000
GROUP BY manager_id
ORDER BY MlN (salary) DESC;
B. SELECT manager_id, HTN(salary)
FROM employees
WHERE manager_id IS NOT NULL
HAVING MIN (salary) > 6000
GROUP BY manager_id
ORDEU BY MIN (salary) DESC;
C. SELECT manager_id, MTN(salary)
FROM employees
WHERE manager_ id IS NOT NULL
GROUP BY manager_id
HAVING MlN (salary) > 6000
ORDER BV MlN (salary);
D. SELECT managar_id, MIN (salary)
FROM employees
HAVING MIN(salary) > 6000
WHERE manager_id IS NOT NULL
GROUP BY manager_id
ORDER BY MTN(salary) DESC;

Answer: C

NEW QUESTION # 122
......

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