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Oracle 1z0-071 Exam Syllabus Topics:

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

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Oracle Database SQL Sample Questions (Q292-Q297):

NEW QUESTION # 292
Examine this SQL statement:

Which two are true?

A. All existing rows in the EMPLOYEES table are deleted.
B. The subquery is not a correlated subquery.
C. The subquery is executed before the DELETE statement is executed.
D. The DELETE statement executes successfully even if the subquery selects multiple rows.
E. The subquery is executed for every row in the employees table.

Answer: C,E

NEW QUESTION # 293
The following are the steps for a correlated subquery, listed in random order:
1) The WHERE clause of the outer query is evaluated.
2) The candidate row is fetched from the table specified in the outer
query.
3) The procedure is repeated for the subsequent rows of the table, till all the rows are processed.
4) Rows are returned by the inner query, after being evaluated with the value from the candidate row in the outer query.
Identify the option that contains the steps in the correct sequence in which the Oracle server evaluates a correlated subquery.

A. 4,1,2,3
B. 2,1,4,3
C. 4,2,1,3
D. 2,4,1,3

Answer: D

NEW QUESTION # 294
View the Exhibit and examine PRODUCTS and ORDER_ITEMS tables.

You executed the following query to display PRODUCT_NAME and the number of times the product has been ordered:
SELECT p.product_name, i.item_cnt
FROM (SELECT product_id, COUNT (*) item_cnt
FROM order_items
GROUP BY product_id) i RIGHT OUTER JOIN products p
ON i.product_id = p.product_id;
What would happen when the above statement is executed?

A. The statement would not execute because the ITEM_CNT alias cannot be displayed in the outer query.
B. The statement would execute successfully to produce the required output.
C. The statement would not execute because the GROUP BY clause cannot be used in the inline view.
D. The statement would not execute because inline views and outer joins cannot be used together.

Answer: B

NEW QUESTION # 295
Refer to the exhibit.

Which two queries will result in an error?

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

Answer: C,E

Explanation:
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.
Reference:
Oracle Database SQL Language Reference, 12c Release 1 (12.1): "Database Object Names and Qualifiers"

NEW QUESTION # 296
View the Exhibit and examine the data in the PROMOTIONStable.

PROMO_BEGIN_DATEis stored in the default date format, dd-mon-rr.
You need to produce a report that provides the name, cost, and start date of all promos in the POSTcategory that were launched before January 1, 2000.
Which SQL statement would you use?
SELECT promo_name, promo_cost, promo_begin_date

A. FROM promotions
WHERE promo_category LIKE '%post%' AND promo_begin_date < '1-JAN-00';
B. FROM promotions
WHERE promo_category = 'post' AND promo_begin_date < '01-01-00';
SELECT promo_name, promo_cost, promo_begin_date
C. FROM promotions
WHERE promo_cost LIKE 'post%' AND promo_begin_date < '01-01-2000';
SELECT promo_name, promo_cost, promo_begin_date
D. FROM promotions
WHERE promo_category LIKE 'P%' AND promo_begin_date < '1-JANUARY-00';
SELECT promo_name, promo_cost, promo_begin_date

Answer: A

NEW QUESTION # 297
......

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