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Oracle 1z1-071 Exam Syllabus Topics:

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

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Oracle Database SQL 認定 1z1-071 試験問題 (Q315-Q320):

質問 # 315
Evaluate the following query:
SQL> SELECT TRUNC (ROUND(156.00, -1),-1)
FROM DUAL;
What would be the outcome?

A. 0
B. 1
C. 2
D. 3
E. 4

正解：C

解説：
Explanation/Reference:
References:
https://docs.oracle.com/cd/B19306_01/server.102/b14200/functions135.htm
https://docs.oracle.com/cd/B28359_01/olap.111/b28126/dml_functions_2127.htm

質問 # 316
Which two statements are true about the ORDER BY clause?

A. Ina character sort, the values are case-sensitive.
B. Only columns that are specified in the SELECT list can be used in the ORDER BY cause.
C. Numeric values are displayed in descending order if they have decimal positions.
D. Column aliases can be used In the ORDER BY cause.
E. NULLS are not included in the sort operation.

正解：A、D

解説：
The ORDER BY clause in Oracle SQL is used to sort the result set of a query by one or more columns, and it comes with its own set of rules and behaviors:
D . Column aliases can be used In the ORDER BY clause: True, column aliases that are specified in the SELECT clause can be used in the ORDER BY clause to refer to the columns to sort the results by.
E . In a character sort, the values are case-sensitive: Oracle sorts results in case-sensitive order by default when using the ORDER BY clause with character columns, unless otherwise specified by the NLS_SORT parameter.
Reference:
Oracle Database SQL Language Reference 12c, which provides details on sorting query results using ORDER BY.

質問 # 317
View the exhibit and examine the structure in ORDERS and ORDER_ITEMS tables.
You need to create a view that displays the ORDER_ID, ORDER_DATE, and the total number of items in each order.
Which CREATE VIEW statement would create the views successfully?

A. CREATE OR REPLACE VIEW ord_vuAS SELECT o.order_id, o.order_date, COUNT (i.line_item_id)"NO OF ITEMS"FROM orders o JOIN order_items iON (o.order_id = i.order_id)GROUP BY o.order_id, o.order_date;
B. CREATE OR REPLACE VIEW ord_vu (order_id, order_date)AS SELECT o.order_id, o.order_date, COUNT (i.line_item_id)"NO OF ITEMS"FROM orders o JOIN order_items iON (o.order_id = i.order_id)GROUP BY o.order_id, o.order_date;
C. CREATE OR REPLACE VIEW ord_vuAS SELECT o.order_id, o.order_date, COUNT (i.line_item_id) ||"NO OF ITEMS"FROM orders o JOIN order_items iON (o.order_id = i.order_id)GROUP BY o.order_id, o.order_dateWHITH CHECK OPTION;
D. CREATE OR REPLACE VIEW ord_vuAS SELECT o.order_id, o.order_date, COUNT (i.line_item_id)FROM orders o JOIN order_items iON (o.order_id = i.order_id)GROUP BY o.order_id, o.order_date;

正解：A

質問 # 318
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 SQL statement would you execute to get the desired output?

A. SELECT first_name, salary, salary*12+salary*commission_pct "Total"FROM EMPLOYEES;
B. SELECT first_name, salary, salary*12+(salary*NVL2 (commission_pct, salary,salary+commission_pct))"Total"FROM EMPLOYEES;
C. SELECT first_name, salary (salary + NVL (commission_pct, 0)*salary)*12 "Total"FROM EMPLOYEES;
D. SELECT first_name, salary, salary*12 + NVL(salary,0)*commission_pct, "Total"FROM EMPLOYEES;

正解：B

質問 # 319
Which two tasks can be performed by using Oracle SQL statements? (Choose two.)

A. executing operating system (OS) commands in a session
B. querying data from tables in different databases
C. changing the password for an existing database user
D. connecting to a database instance
E. starting up a database instance

正解：B、C

解説：
References:
http://www.techonthenet.com/oracle/password.php
https://docs.oracle.com/cd/B28359_01/server.111/b28324/tdpii_distdbs.htm

質問 # 320
......

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