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Oracle 1z1-071 (Oracle Database SQL) certification exam is a professional certification exam that verifies an individual's knowledge and skills in SQL programming language and Oracle database management systems. Passing 1z0-071 Exam can help individuals enhance their career opportunities and advance their knowledge and skills in database management and application development.

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Oracle Database SQL Sample Questions (Q256-Q261):

NEW QUESTION # 256
Examine the description of the PRODUCTS table:

Which two statements execute without errors?

A. MERGE INTO new_prices n
USING (SELECT * FROM products) p
WHEN MATCHED THEN
UPDATE SET n.price= p.cost* 01
WHEN NOT MATCHED THEN
INSERT(n.prod_id, n.price) VALUES(p.prod_id, cost*.01)
WHERE(p.cost<200);
B. MERGE INTO new_prices n
USING products p
ON (p.prod_id =n.prod_id)
WHEN NOT MATCHED THEN
INSERT (n.prod _id, n.price) VALUES (p.prod_id, cost*.01)
WHERE (p.cost<200);
C. MERGE INTO new_prices n
USING (SELECT * FROM products WHERE cost>150) p
ON (n.prod_id= p.prod_id)
WHEN MATCHED THEN
DELETE WHERE (p.cost<200)
D. MERGE INTO new_prices n
USING (SELECT * FROM products WHERE cost>150) p
ON (n.prod_id= p.prod_id)
WHEN MATCHED THEN
UPDATE SET n.price= p.cost*.01
DELETE WHERE (p.cost<200);

Answer: B,D

NEW QUESTION # 257
Evaluate the following SELECT statement and view the exhibit to examine its output:
SELECT constraint_name, constraint_type, search_condition, r_constraint_name, delete_rule, status, FROM user_constraints WHERE table_name = 'ORDERS'; CONSTRAINT_NAME CON SEARCH_CONDITION R_CONSTRAINT_NAME DELETE_RULE STATUS
ORDER_DATE_NN
C
"ORDER_DATE" IS NOT NULL
ENABLED
ORDER_CUSTOMER_ID_NN
C
"CUSTOMER_ID" IS NOT NULL
ENABLED
ORDER_MODE_LOV
C
order _mode in ('direct', 'online')
ENABLED
ORDER TOTAL MIN
C
order total >= 0
ENABLED
ORDER PK
P
ENABLED
ORDERS CUSTOMER ID
R
CUSTOMERS ID
SET NULL
ENABLED
ORDERS SALES REP
R
EMP EMP ID
SET NULL
ENABLED
Which two statements are true about the output? (Choose two.)

A. In the second column, 'c' indicates a check constraint.
B. The R_CONSTRAINT_NAME column gives the alternative name for the constraint.
C. The column DELETE_RULE decides the state of the related rows in the child table when the corresponding row is deleted from the parent table.
D. The STATUS column indicates whether the table is currently in use.

Answer: A,C

NEW QUESTION # 258
Examine the command to create the BOOKS table.
SQL> create table books(book id CHAR(6) PRIMARY KEY,
title VARCHAR2(100) NOT NULL,
publisher_id VARCHAR2(4)
author_id VARCHAR2 (50));
The BOOK ID value 101 does not exist in the table.
Examine the SQL statement.
insert into books (book id title, author_id values
('101''LEARNING SQL','Tim Jones')

A. It executes successfully only if NULL is explicitly specified in the INSERT statement.
B. It executes successfully onlyif NULL PUBLISHER ID column name is added to the columns list and NULL is explicitly specified In the INSERT statement.
C. It executes successfully and the row is inserted with a null PLBLISHER_ID.
D. It executes successfully only NULL PUBLISHER_ID column name is added to the columns list in the INSERT statement.

Answer: C

Explanation:
* A. It executes successfully and the row is inserted with a null PUBLISHER_ID: The SQL statement does not specify the publisher_id, and since there is no NOT NULL constraint on this column, Oracle will insert the row with a NULL value for publisher_id. The statement is syntactically correct, assuming the column names and values are properly specified and formatted.

NEW QUESTION # 259
Examine the business rule:
Each student can work on multiple projects and each project can have multiple students.
You need to design an Entity Relationship Model (ERD) for optimal data storage and allow for generating reports in this format:
STUDENT_ID FIRST_NAME LAST_NAME PROJECT_ID PROJECT_NAME PROJECT_TASK
Which two statements are true in this scenario? (Choose two.)

A. An associative table must be created with a composite key of STUDENT_ID and PROJECT_ID, which is the foreign key linked to the STUDENTS and PROJECTS entities.
B. STUDENT_IDmust be the primary key in the STUDENTSentity and foreign key in the PROJECTSentity.
C. The ERD must have a 1:M relationship between the STUDENTSand PROJECTSentities.
D. PROJECT_IDmust be the primary key in the PROJECTSentity and foreign key in the STUDENTSentity.
E. The ERD must have a M:M relationship between the STUDENTSand PROJECTSentities that must be resolved into 1:M relationships.

Answer: A,E

Explanation:
Explanation/Reference:
References:
http://www.oracle.com/technetwork/issue-archive/2011/11-nov/o61sql-512018.html

NEW QUESTION # 260
Examine the description of the EMPLOYEES table:

Which query requires explicit data type conversion?

A. SELECT SUBSTR(join_date, 1, 2) - 10 FROM employees;
B. SELECT join_date || ' ' || salary FROM employees;
C. SELECT join_date + '20' FROM employees;
D. SELECT join_date FROM employees WHERE join_date > '10-02-2018';
E. SELECT salary + '120.50' FROM employees;

Answer: D

Explanation:
Explanation

NEW QUESTION # 261
......

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