TRAINING 1Z1-071 PDF & 1Z1-071 RELATED CERTIFICATIONS

Training 1z1-071 Pdf & 1z1-071 Related Certifications

Training 1z1-071 Pdf & 1z1-071 Related Certifications

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The Oracle 1z1-071 exam covers a wide range of topics such as database architecture, data manipulation, data control language statements, and data definition language statements. Candidates will be tested on their ability to write SQL queries, create and manage database objects, and use advanced SQL features such as subqueries, set operators, and regular expressions.

Oracle 1z1-071 Exam is designed to evaluate the candidate's knowledge and skills in the area of Oracle Database SQL. 1z1-071 exam is intended for individuals who wish to pursue a career as an Oracle Database Developer or Administrator. The Oracle 1z1-071 exam is a certification exam that is globally recognized and highly valued in the IT industry.

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Oracle Database SQL Sample Questions (Q279-Q284):

NEW QUESTION # 279
View the exhibit and examine the ORDERStable.

The ORDERStable contains data and all orders have been assigned a customer ID. Which statement would add a NOTNULLconstraint to the CUSTOMER_IDcolumn?
ALTER TABLE orders

  • A. ADD customer_id NUMBER(6)CONSTRAINT orders_cust_id_nn NOT NULL;
  • B. MODIFY CONSTRAINT orders_cust_id_nn NOT NULL (customer_id);
    ALTER TABLE orders
  • C. MODIFY customer_id CONSTRAINT orders_cust_nn NOT NULL (customer_id);
    ALTER TABLE orders
  • D. ADD CONSTRAINT orders_cust_id_nn NOT NULL (customer_id);
    ALTER TABLE orders

Answer: C

Explanation:
Explanation/Reference:


NEW QUESTION # 280
Which three statements are true about the ALTER TABLE....DROP COLUMN....command?

  • A. The column in a composite PRIMARY KEYwith the CASCADEoption can be dropped.
  • B. A column can be dropped only if it does not contain any data.
  • C. A parent key column in the table cannot be dropped.
  • D. A dropped column can be rolled back.
  • E. A column can be dropped only if another column exists in the table.

Answer: A,C,E


NEW QUESTION # 281
Examine the commands used to create DEPARTMENT_DETAILSand COURSE_DETAILS:
SQL>CREATE TABLE DEPARTMENT_DETAILS
( DEPARTMENT_ID NUMBER PRIMARY KEY,
DEPARTMENT_NAME VARCHAR2(50),
HOD VARCHAR2(50));
SQL>CREATE TABLE COURSE_DETAILS
(COURSE_ID NUMBER PRIMARY KEY,
COURSE_NAME VARCHAR2(50),
DEPARTMENT_ID VARCHAR2(50));
You want to generate a list of all department IDs along with any course IDs that may have been assigned to them.
Which SQL statement must you use?

  • A. SELECT d.department_id, c.course_id FROM department_details d RIGHT OUTER JOIN course_details c ON (c.department_id=d. department_id);
  • B. SELECT d.department_id, c.course_id FROM department_details d LEFT OUTER JOIN course_details c ON (d.department_id=c. department_id);
  • C. SELECT d.department_id, c.course_id FROM department_details d RIGHT OUTER JOIN course_details c ON (d.department_id=c. department_id);
  • D. SELECT d.department_id, c.course_id FROM course_details c LEFT OUTER JOIN department_details d ON (c.department_id=d. department_id);

Answer: B


NEW QUESTION # 282
Examine this partial statement:
SELECT ename, sal,comm FROM emp
Now examine this output:

WHICH ORDER BY clause will generate the displayed output?

  • A. ORDER BY comm DESC NULLS LAST, ename
  • B. ORDER BY NVL(comm,0) ASC NULLS LAST, ename
  • C. ORDER BY NVL(comm,0) ASC NULLS FIRST, ename
  • D. ORDER BY NVL(enam,0) DESC, ename

Answer: C

Explanation:
The ORDER BY clause is used in a SELECT statement to sort the returned rows by one or more columns.
A . This clause would attempt to order by ename as if it were a numeric column, which is not correct since ename is not numeric.
B . This is the correct answer. The NVL function replaces nulls with the specified value, in this case, 0. This clause sorts by comm, with nulls considered as 0 and appearing first, followed by the actual values, and then sorts by ename.
C . This clause is incorrect because it would place null values at the end, but in the output, rows with null comm appear at the beginning.
D . This clause would sort the comm in descending order with the nulls at the end, which is not consistent with the output shown.
Reference:
Oracle Database SQL Language Reference, 12c Release 1 (12.1): "ORDER BY Clause" Oracle Database SQL Language Reference, 12c Release 1 (12.1): "NVL Function" Please note that the correct formatting of SQL statements and clauses is crucial for the successful execution of queries.


NEW QUESTION # 283
Which two statements are true about the SET VERIFY ON command?

  • A. It displays values for variables prefixed with &&.
  • B. It displays values for variables created by the DEFINE command.
  • C. It can be used only in SQL*plus.
  • D. It can be used in SQL Developer and SQL*Plus.
  • E. It displays values for variables used only in the WHERE clause of a query.

Answer: B,D

Explanation:
The SET VERIFY ON command is related to how SQL*Plus and SQL Developer display information about substitution variables:
A . It displays values for variables created by the DEFINE command: When VERIFY is set to ON, SQL*Plus and SQL Developer will display the old and new values of a substitution variable when it is redefined using the DEFINE command or when a new value is provided for it during the session.
B . It can be used in SQL Developer and SQL*Plus: While traditionally associated with SQL*Plus, the SET VERIFY command is also supported in SQL Developer, allowing you to control the display of substitution variable values in both environments.
Reference:
Oracle SQL*Plus User's Guide and Reference, especially the section on the SET command and substitution variables.


NEW QUESTION # 284
......

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