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Oracle 1z0-071 Exam Syllabus Topics:

Section	Objectives
Topic 1: SQL Functions	- Single-row functions 1. Character, numeric, date functions - Conversion and conditional functions 1. TO_CHAR, TO_NUMBER, CASE expressions
Topic 2: Relational Database Concepts	- Tables, rows, columns, and relational model basics - Data types and database objects overview
Topic 3: Data Manipulation and Schema Objects	- DDL operations 1. CREATE, ALTER, DROP tables and constraints - DML operations 1. INSERT, UPDATE, DELETE, MERGE
Topic 4: 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
Topic 5: Subqueries and Advanced SQL	- Correlated subqueries and nested queries - Single-row and multi-row subqueries

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최신 Oracle PL/SQL Developer Certified Associate 1z0-071 무료샘플문제 (Q333-Q338):

질문 # 333
You must create a table EMPLOYEES in which the values in the columns EMPLOYEES_ID and LOGIN_ID must be unique and not null. (Choose two.) Which two SQL statements would create the required table?

A. CREATE TABLE employees(employee_id NUMBER,login_id NUMBER,employee_name VARCHAR2(25),hire_date DATE,CONSTRAINT emp_id_pk PRIMARY KEY (employee_id, login_id));
B. CREATE TABLE employees(employee_id NUMBER CONSTRAINT emp_id_pk PRIMARY KEY, Login_id NUMBER UNIQUE, Employee_name VARCHAR2(25),Hire_date DATE);
C. CREATE TABLE employees(employee_id NUMBER CONSTRAINT emp_id_nn NOT NULL, Login_id NUMBER CONSTRAINT login_id_nn NOT NULL,Employee_name VARCHAR2(100),Hire_date DATE,CONSTRAINT emp_id_ukUNIQUE (employee_id, login_id));
D. CREATE TABLE employees(employee_id NUMBER,Login_id NUMBER,Employee_name VARCHAR2(100),Hire_date DATE,CONSTRAINT emp_id_uk UNIQUE (employee_id, login_id);CONSTRAINT emp_id_nn NOT NULL (employee_id, login_id));
E. CREATE TABLE employees(employee_id NUMBER,Login_id NUMBER,Employee_name VARCHAR2(100),Hire_date DATE,CONSTRAINT emp_id_ukUNIQUE (employee_id, login_id));

정답：A,C

질문 # 334

Which two queries will result in an error?

A. SELECT LAST_NAME,12 * SALARY AS ANNUAL_SALARY
FROM EMPLOYEES
WHERE ANNUAL_SALARY > 100000
ORDER BY ANNUAL_SALARY;
B. SELECT LAST_NAME,12 * SALARY AS ANNUAL_SALARY
FROM EMPLOYEES
WHERE ANNUAL_SALARY > 100000
ORDER BY 12 * SALARY ;
C. SELECT FIRST_NAME LAST_NAME FROM EMPLOYEES;
D. SELECT LAST_NAME,12 * SALARY AS ANNUAL_SALARY
FROM EMPLOYEES
WHERE 12 * SALARY > 100000
ORDER BY ANNUAL_SALARY;
E. SELECT LAST_NAME,12 * SALARY AS ANNUAL_SALARY
FROM EMPLOYEES
WHERE 12 * SALARY > 100000
ORDER BY 12 * SALARY;
F. SELECT FIRST_NAME,LAST_NAME FROM EMPLOYEES;

정답：B,C

설명：
In Oracle SQL, the following syntactical rules apply:
A). This query will result in an error because there is no comma separating the column names FIRST_NAME and LAST_NAME. The correct syntax should include a comma to separate the column names in the SELECT list.
B). This query is correctly formatted with a comma separating the column names, so it will not result in an error.
C). This query will result in an error because an alias defined in the SELECT list (ANNUAL_SALARY) cannot be used in the WHERE clause of the same query level. It must be repeated in the WHERE clause as 12
* SALARY.
D). This query will execute successfully because 12 * SALARY is directly used in the WHERE clause, and ANNUAL_SALARY is used in the ORDER BY clause, which is allowed.
E). This query is correct and will not result in an error. It uses 12 * SALARY in both the WHERE and ORDER BY clauses.
F). Similar to option C, this query will execute successfully because ANNUAL_SALARY is correctly used in the ORDER BY clause, and the WHERE clause does not attempt to reference the alias.
References:
* Oracle Database SQL Language Reference, 12c Release 1 (12.1): "Database Object Names and Qualifiers"

질문 # 335
Which two statements are true about INTERVAL data types? (Choose two.)

A. INTERVAL YEAR TO MONTH columns support yearly intervals.
B. The value in an INTERVAL DAY TO SECOND column can be copied into an INTERVAL YEAR TO MONTH column.
C. INTERVAL YEAR TO MONTH columns only support monthly intervals within a range of years.
D. The YEAR field in an INTERVAL YEAR TO MONTH column must be a positive value.
E. INTERVAL YEAR TO MONTH columns only support monthly intervals within a single year.
F. INTERVAL DAY TO SECOND columns support fractions of seconds.

정답：C,F

설명：
https://www.oracletutorial.com/oracle-basics/oracle-interval/

질문 # 336
Examine this query:

Which two methods should you use to prevent prompting for a hire date value when this query is executed?

A. Execute the SET VERIFY ON command before executing the query.
B. Replace '&1' with '&&1' in the query.
C. Execute the SET VERIFY OFF command before executing the query.
D. Use the UNDEFINE command before executing the query.
E. Store the query in a script and pass the substitution value to the script when executing it.
F. Use the DEFINE command before executing the query.

정답：A,E

질문 # 337
Which two statements are true regarding the EXISTS operator used in the correlated subqueries? (Choose two.)

A. The outer query stops evaluating the result set of the inner query when the first value is found.
B. It is used to test whether the values retrieved by the inner query exist in the result of the outer query.
C. The outer query continues evaluating the result set of the inner query until all the values in the result set are processed.
D. It is used to test whether the values retrieved by the outer query exist in the result set of the inner query.

정답：A,D

설명：
References:
http://www.techonthenet.com/oracle/exists.php

질문 # 338
......

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