OCSecA 1Z0-051 Oracle

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1Z0-051 Oracle Database: SQL Fundamentals I Vorbereitung für IT-Prüfung hat eine Reihe von spezialisierten Zertifizierungsprüfung im Zusammenhang mit einem bestimmten Gebiet, und so ist die Wahl der richtigen Training Produkt ist sehr wichtig.

OCSecA 1Z0-051 Oracle

QUESTION 1
View the Exhibit and examine the data in the

The PROJ_TASK_DETAILS table stores information about tasks involved in a project and the relation between them.
The BASED_ON column indicates dependencies between tasks. Some tasks do not depend on the completion of any other tasks.

You need to generate a report showing all task IDs, the corresponding task ID they are dependent on, and the name of the employee in charge of the task it depends on.

Which query would give the required result?

A. SELECT p.task_id, p.based_on, d.task_in_charge
FROM proj_task_details p JOIN proj_task_details d
ON (p.based_on = d.task_id);
B. SELECT p.task_id, p.based_on, d.task_in_charge
FROM proj_task_details p LEFT OUTER JOIN proj_task_details d ON (p.based_on = d.task_id);
C. SELECT p.task_id, p.based_on, d.task_in_charge
FROM proj_task_details p FULL OUTER JOIN proj_task_details d ON (p.based_on = d.task_id);
D. SELECT p.task_id, p.based_on, d.task_in_charge
FROM proj_task_details p JOIN proj_task_details d
ON (p.task_id = d.task_id);

Answer: B

QUESTION 2
Which two statements are true regarding subqueries? (Choose two.)

A. A subquery can retrieve zero or more rows.
B. Only two subqueries can be placed at one level.
C. A subquery can be used only in SQL query statements.
D. A subquery can appear on either side of a comparison operator.
E. There is no limit on the number of subquery levels in the WHERE clause of a SELECT statement.

Answer: AD

OCSecA 1Z0-051 Oracle

OCSecA 1Z0-047 Oracle

www.it-pruefungen.ch hilft Ihnen mit hochwertigenUnterlagen und Software, die Fragen und Antworten Zertifizierungsprüfung zu bestehen. Mit Hilfe der www.it-pruefungen.ch sind Sie sicher, die Zertifizierung mit einem hohen Punkt zu bestehen und den Erfolg im IT-Bereich erobern.

1Z0-047 Oracle Database SQL Expert Vorbereitung für IT-Prüfung hat eine Reihe von spezialisierten Zertifizierungsprüfung im Zusammenhang mit einem bestimmten Gebiet, und so ist die Wahl der richtigen Training Produkt ist sehr wichtig.

OCSecA 1Z0-047 Oracle

1.Which two statements are true regarding the types of table joins available in Oracle Database
10g? (Choose two.)
A.You can use the JOIN clause to join only two tables.
B.You can explicitly provide the join condition with a NATURAL JOIN.
C.You can use the USING clause to join tables on more than one column.
D.You can use the ON clause to specify multiple conditions while joining tables.
Correct:C D

2.Which two statements are true regarding subqueries? (Choose two.)
A.The ORDER BY clause can be used in the subquery.
B.A subquery can be used in the FROM clause of a SELECT statement.
C.If the subquery returns NULL, the main query may still return result rows.
D.A subquery can be placed in a WHERE clause, GROUP BY clause, or a HAVING clause.
E.Logical operators, such as AND, OR and NOT, cannot be used in the WHERE clause of a subquery.
Correct:A B

3.Evaluate the following SQL statements in the given order: DROP TABLE dept; CREATE TABLE dept (deptno NUMBER(3) PRIMARY KEY, deptname VARCHAR2(10)); DROP TABLE dept; FLASHBACK TABLE dept TO BEFORE DROP; Which statement is true regarding the above FLASHBACK operation?
A.It recovers only the first DEPT table.
B.It recovers only the second DEPT table.
C.It does not recover any of the tables because FLASHBACK is not possible in this case.
D.It recovers both the tables but the names would be changed to the ones assigned in the RECYCLEBIN.
Correct:B

4.Given below is a list of functions and their purpose in random order. Function Purpose 1)NVL
a) Used for evaluating NOT NULL and NULL values 2)NULLIF b) Used to return the first non- null values in a list of expressions 3)COALESCE c) Used to compare two expressions. If both are same,
it returns NULL; otherwise, it returns only the first expression. 4)NVL2 d) Used to convert NULL
values to actual values Identify the correct combination of functions and their usage.
A.1-a, 2-c, 3-b, 4-d B.1-d, 2-c, 3-b, 4-a C.1-b, 2-c, 3-d, 4-a D.1-d, 2-b, 3-c, 4-a Correct:B

OCSecA 1Z0-047 Oracle