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The Oracle 1z0-071 Exam covers a range of topics such as SQL SELECT statements, data manipulation, data control language, data definition language, and transaction control statements. Candidates are required to have a good understanding of SQL syntax, database objects, data modeling, and normalization concepts. 1z0-071 exam also tests the candidate's ability to write efficient and optimized SQL queries that can retrieve and manipulate data from the Oracle database. Candidates who pass the exam can demonstrate their ability to design, implement and manage Oracle databases, which can help them advance their careers in the field of database management.

Oracle Database SQL Sample Questions (Q128-Q133):

NEW QUESTION # 128
Which three statements are true about defining relations between tables in a relational database? (Choose three.)

A. Foreign key columns allow null values.
B. Every foreign key value must refer to a matching primary or unique key value.
C. Unique key columns allow null values.
D. Primary key columns allow null values.
E. Every primary or unique key value must refer to a matching foreign key value.

Answer: B,D

NEW QUESTION # 129
Which three are true about the CREATE TABLE command? (Choose three.)

A. A user must have the CREATE ANY TABLE privilege to create tables
B. It implicitly rolls back any pending transactions
C. The owner of the table should have space quota available on the tablespace where the table is defined
D. It can include the CREATE..INDEX statement for creating an index to enforce the primary key constraint
E. The owner of the table must have the UNLIMITED TABLESPACE system privilege
F. It implicitly executes a commit

Answer: A,E,F

NEW QUESTION # 130
Examine these statements:
CREATE TABLE dept (
deptno NUMBER PRIMARY KEY,
diname VARCHAR2(10) ,
mgr NUMBER ,
CONSTRAINT dept_fkey FOREIGN KEY(mgr) REFERENCES emp (empno));
CREATE TABLE emp (
Empno NUMBER PRIMARY KEY,
Ename VARCHAR2 (10) ,
deptno NUMBER,
CONSTRAINT emp_fkey FOREIGN KEY (deptno) REFERENCES dept (deptno) DISABLE); ALTER TABLE emp MODIFY CONSTRAINT emp_fkey ENABLE; Which two are true?

A. All three statements execute successfully in the order shown
B. The MGR column in the DEPT table will not be able to contain NULL values.
C. The Deptno column in the emp table will be able to contain nulls values.
D. The CREATE TABLE EMP statement must precede the CREATE TABLE DEPT statement for all threestatements to execute successfully.
E. The DEFT FKEY constraint definition must be removed from the CREATE TABLE DEF statement.and be added with an AITER TABLE statement once both tables are created, for the two CREATE TABLE statements to execute successfully in the order shown.
F. Both foreign key constraint definitions must be removed from the CREATE TABLE statements, andbe added with ALTER TABLE statements once both tables are created, for the two CREATE TABLEstatements to execute successfully in the order shown.

Answer: C,E

NEW QUESTION # 131
Which statements is true about using functions in WHERE and HAVING?

A. using single-row functions in the WHERE clause requires a subquery
B. using single-row functions in the HAVING clause requires a subquery
C. using aggregate functions in the HAVING clause requires a subquery
D. using aggregate functions in the WHERE clause requires a subquery

Answer: D

Explanation:
Single-row functions can be used in the WHERE and HAVING clauses without requiring a subquery.
However, aggregate functions, which operate on many rows to give one result per group, cannot be used in a WHERE clause unless a subquery is used because the WHERE clause is processed before the individual rows are aggregated into groups.
A). False. Single-row functions can be directly used in the WHERE clause.
B). False. Single-row functions can be directly used in the HAVING clause.
C). True. Aggregate functions cannot be used in the WHERE clause without a subquery because the WHERE clause filters individual rows before they are aggregated.
D). False. Aggregate functions are intended to be used in the HAVING clause, which is specifically for filtering groups of rows after they have been aggregated, and they do not require a subquery to be used there.

NEW QUESTION # 132

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

Answer: A,E

NEW QUESTION # 133
......

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