IT-Zertifizierung Oracle 1Z0-007

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1Z0-007 Introduction to Oracle9i: SQ Der einfachste Weg für die IT-Prüfung vorzubereiten, ist die Praxis-Tests auf Zertifizierungsprüfung Muster zu nehmen und zu verstehen, die richtige sowie falsche Antwort Erklärungen Deine Zweifel klären. Lesen Sie dazu auch relevante technische Artikel zu versierter in der damit verbundenen Technologie.

IT-Zertifizierung Oracle 1Z0-007

QUESTION NO: 1
The EMPLOYEES table contains these columns:
EMPLOYEE_ID NUMBER(4)
LAST_NAME VARCHAR2 (25)
JOB_ID VARCHAR2(10)
You want to search for strings that contain ‘SA_’ in the JOB_ID column. Which SQL statement do you use?

A. SELECT employee_id, last_name, job_id
FROM employees
WHERE job_id = ‘%SA_’;
B. SELECT employee_id, last_name, job_id
FROM employees
WHERE job_id LIKE ‘%SA_’;
C. SELECT employee_id, last_name, job_id
FROM employees
WHERE job_id LIKE ‘%SA_’ ESCAPE “\”;
D. SELECT employee_id, last_name, job_id
FROM employees
WHERE job_id LIKE ‘%SA\_%’ ESCAPE ‘\’;

Answer: D

Explanation:
ESCAPE identifier to search for the actual % and _ symbol
Refer : Introduction to Oracle9i : SQL, Oracle University Study Guide, 2-13

QUESTION NO: 2
You own a table called EMPLOYEES with this table structure:
EMPLOYEE_ID NUMBER Primary Key
FIRST_NAME VARCHAR2(25)
LAST_NAME VARCHAR2(25)
HIRE_DATE DATE
What happens when you execute this DELETE statement?
DELETE employees;

A. You get an error because of a primary key violation.
B. The data and structure of the EMPLOYEES table are deleted.
C. You get an error because the statement is not syntactically correct.
D. The data in the EMPLOYEES table is deleted but not the structure.

Answer: D

Explanation:
You can remove existing rows from a table by using the DELETE statement.
DELETE [FROM] table
[WHERE condition];

QUESTION NO: 3
You need to create a table named ORDERS that contains four columns:
1. an ORDER_ID column of number data type
2. a CUSTOMER_ID column of number data type
3. an ORDER_STATUS column that contains a character data type
4. a DATE_ORDERED column to contain the date the order was placed
When a row is inserted into the table, if no value is provided for the status of the order, the value PENDING should be used instead.
Which statement accomplishes this?

A. CREATE TABLE orders (
order_id NUMBER(10),
customer_id NUMBER(8),
order_status VARCHAR2(10) DEFAULT ‘PENDING’,
date_ordered VARCHAR2 );
B. CREATE TABLE orders (
order_id NUMBER(10),
customer_id NUMBER(8),
order_status VARCHAR2(10) DEFAULT ‘PENDING’,
date_ordered DATE );
C. CREATE OR REPLACE TABLE orders (
order_id NUMBER(10),
customer_id NUMBER(8),
order_status VARCHAR2(10) DEFAULT ‘PENDING’,
date_ordered DATE );
D. CREATE TABLE orders (
order_id NUMBER(10),
customer_id NUMBER(8),
order_status NUMBER(10) DEFAULT ‘PENDING’,
date_ordered DATE );
E. CREATE OR REPLACE TABLE orders (
order_id NUMBER(10),
customer_id NUMBER(8),
order_status VARCHAR2(10) = ‘PENDING’,
date_ordered DATE );
F. CREATE TABLE orders (
order_id NUMBER(10),
customer_id NUMBER(8),
order_status VARCHAR2(10) = ‘PENDING’,
date_ordered DATE );

Answer: B

Explanation:
Requirement that Order_Status should be a character data type
Not E: Order_status must be a character data type. There is also a syntax error.

QUESTION NO: 4
Evaluate this SQL statement:
SELECT e.EMPLOYEE_ID,e.LAST_NAME,e.DEPARTMENT_ID, d.DEPARTMENT_NAME
FROM EMPLOYEES e, DEPARTMENTS d
WHERE e.DEPARTMENT_ID = d.DEPARTMENT_ID;
In the statement, which capabilities of a SELECT statement are performed?

A. selection, projection, join
B. selection, intersection, join
C. intersection, projection, join
D. difference, projection, product
E. difference, projection, join

Answer: A

Explanation:
Selection, projection and join capabilities of a SELECT statement are performed in this view.

IT-Zertifizierung Oracle 1Z0-007