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Oracle 1z0-071 (Oracle Database SQL) Certification Exam is an excellent way to demonstrate your expertise in SQL and gain recognition for your skills. It is designed for individuals who have a solid understanding of SQL and want to validate their skills in Oracle Database SQL. If you are interested in pursuing a career in SQL development or database administration, this certification exam can help you achieve your goals.

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Oracle 1z0-071 Certification Exam is a rigorous test that requires candidates to prepare thoroughly. Oracle offers a range of resources to help candidates prepare for the exam, including training courses, study guides, and practice exams. Candidates are also encouraged to gain hands-on experience with Oracle databases to fully understand the concepts covered in the exam.

Oracle Database SQL Sample Questions (Q93-Q98):

NEW QUESTION # 93
Which statement is true regarding the INTERSECT operator?

A. The number of columns and data types must be identical for all SELECT statements in the query.
B. Reversing the order of the intersected tables alters the result.
C. It ignores NULL values.
D. The names of columns in all SELECT statements must be identical.

Answer: A

Explanation:
Explanation
INTERSECT Returns only the rows that occur in both queries' result sets, sorting them and removing duplicates.
The columns in the queries that make up a compound query can have different names, but the output result set will use the names of the columns in the first query.
References:
http://oraclexpert.com/using-the-set-operators/

NEW QUESTION # 94
View the Exhibit and examine the data in the PRODUCTStable.

Which statement would add a column called PRICE, which cannot contain NULL?
ALTER TABLE products

A. ADD price NUMBER(8,2) NOT NULL;
ALTER TABLE products
B. ADD price NUMBER(8,2) DEFAULT NOT NULL;
ALTER TABLE products
C. ADD price NUMBER(8,2) DEFAULT 0 NOT NULL;
ALTER TABLE products
D. ADD price NUMBER(8,2) DEFAULT CONSTRAINT p_nn NOT NULL.

Answer: C

Explanation:
Explanation

NEW QUESTION # 95
Examine the data in the INVOICES table:

Examine the data in the CURRENCIES table:
CURRENCY_CODE
-------------
JPY
GPB
CAD
EUR
USD
Which query returns the currencies in CURRENCIES that are not present in INVOICES?

A. SELECT * FROM currencies
MINUS
SELECT * FROM invoices;
B. SELECT * FROM currencies
WHERE NOT EXISTS (
SELECT NULL FROM invoices WHERE currency_ code = currency_ code);
C. SELECT currency_ code FROM currencies
INTERSECT
SELECT currency_ code FROM invoices;
D. SELECT currency_ code FROM currencies
MINUS
SELECT currency_ code FROM invoices;

Answer: D

NEW QUESTION # 96
Which two statements are true regarding non equijoins?

A. The USING clause can be used.
B. The Oracle join syntax can be used.
C. The ON clause can be used.
D. Table aliases must be used.
E. The SQL:1999 compliant ANSI join syntax must be used.

Answer: B,C

NEW QUESTION # 97
You create a table by using this command:
CREATE TABLE rate_list (rate NUMBER(6,2));
Which two are true about executing statements?

A. INSERT INTO rate_list VALUES (0.551) inserts the value as .55.
B. INSERT INTO rate_list VALUES (-99.99) inserts the value as 99.99.
C. INSERT INTO rate_list VALUES (87654. 556) inserts the value as 87654.6.
D. INSERT INTO rate_list VALUES (0.999) produces an error.
E. INSERT INTO rate_list VALUES (-10) produces an error.
F. INSERT INTO rate_list VALUES (-.9) inserts the value as -.9.

Answer: A,F

Explanation:
The behavior of data insertion into a table with a specific numeric format in Oracle Database 12c can be explained as follows:
A . INSERT INTO rate_list VALUES (-.9) inserts the value as -.9: This is correct. The value -.9 is within the precision defined by the table column (NUMBER(6,2)), where 6 is the total number of digits (including both sides of the decimal point), and 2 is the number of digits after the decimal point.
E . INSERT INTO rate_list VALUES (0.551) inserts the value as .55: Oracle rounds the number to the nearest value that fits the specified scale of 2. Thus, 0.551 rounds down to 0.55.
Reference:
Oracle Database SQL Language Reference 12c, particularly sections on data types and numeric precision.

NEW QUESTION # 98
......

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