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Oracle 1z0-071 Exam Syllabus Topics:

Section	Objectives
Topic 1: Data Manipulation and Schema Objects	- DDL operations 1. CREATE, ALTER, DROP tables and constraints - DML operations 1. INSERT, UPDATE, DELETE, MERGE
Topic 2: Relational Database Concepts	- Tables, rows, columns, and relational model basics - Data types and database objects overview
Topic 3: SQL Functions	- Single-row functions 1. Character, numeric, date functions - Conversion and conditional functions 1. TO_CHAR, TO_NUMBER, CASE expressions
Topic 4: Subqueries and Advanced SQL	- Correlated subqueries and nested queries - Single-row and multi-row subqueries
Topic 5: SQL Retrieval	- Joins and set operations 1. INNER, OUTER, CROSS joins 2. UNION, INTERSECT, MINUS - SELECT statements and filtering data 1. WHERE clause and conditions 2. ORDER BY and row limiting

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Oracle Database SQL Sample Questions (Q407-Q412):

NEW QUESTION # 407
You are designing the structure of a table in which two columns have the specifications:
COMPONENT_ID- must be able to contain a maximum of 12 alphanumeric characters and uniquely identify the row EXECUTION_DATETIME- contains Century, Year, Month, Day, Hour, Minute, Second to the maximum precision and is used for calculations and comparisons between components.
Which two options define the data types that satisfy these requirements most efficiently?

A. The COMPONENT_IDmust be of ROWID data type.
B. The COMPONENT_IDcolumn must be of CHAR data type.
C. The EXECUTION_DATETIME must be of TIMESTAMP data type.
D. The EXECUTION_DATETIME must be of DATE data type.
E. The EXECUTION_DATETIME must be of INTERVAL DAY TO SECOND data type.
F. The COMPONENT_IDmust be of VARCHAR2 data type.

Answer: B,D

NEW QUESTION # 408
View the exhibit and examine the description of the DEPARTMENTS and EMPLOYEES tables.

You wrote this SQL statement to retrieve EMPLOYEE_ID, FIRST_NAME, and DEPARTMENT NAME, for all employees:
SELECT employee_id, first_name, department_name
FROM employees
NATURAL JOIN departments;
The desired output is not obtained after executing the above SQL statement. What could be the reason for this?

A. The EMPLOYEES and DEPARTMENTS tables have more than one column with the same column name and data type.
B. The table prefix is missing for the column names in the SELECT clause.
C. The DEPARTMENTS table is not used before the EMPLOYEES table in the FROM clause.
D. The NATURAL JOIN clause is missing the USING clause.

Answer: A

Explanation:
Natural join needs only one column to be the same in each table. The EMPLOYEES and DEPARTMENTS tables have two columns that are the same (Department_ID and Manager_ID)

NEW QUESTION # 409
Examine the contents of the EMP table:

Examine this query that executes successfully:

What is the result?

A. It will return the six employees earning the lowest salaries, in ascending order.
B. It will return the six employees earning the highest salaries, in descending order.
C. It will return the five employees earning the highest salaries, in descending order.
D. It will return the five employees earning the lowest salaries, in ascending order.

Answer: D

Explanation:
CREATE TABLE EMP
(
ID NUMBER(10),
NAME VARCHAR2(10),
SALARY NUMBER(10)
)
INSERT INTO EMP VALUES (101, 'JOHN', 26000);
INSERT INTO EMP VALUES (102, 'NEENA', 24000);
INSERT INTO EMP VALUES (103, 'DEHAAN', 12000);
INSERT INTO EMP VALUES (104, 'LEX', 17000);
INSERT INTO EMP VALUES (105, 'BILL', 18000);
INSERT INTO EMP VALUES (106, 'DANIEL', 26000);
INSERT INTO EMP VALUES (107, 'BEN', 12000);
INSERT INTO EMP VALUES (108, 'GEORGE', 25000);
SELECT * FROM EMP
ORDER BY SALARY
FETCH FIRST 5 ROWS WITH TIES;

NEW QUESTION # 410
The ORDERStable has a primary key constraint on the ORDER_IDcolumn.
The ORDER_ITEMStable has a foreign key constraint on the ORDER_IDcolumn, referencing the primary key of the ORDERStable.
The constraint is defined with ON DELETE CASCADE.
There are rows in the ORDERStable with an ORDER_TOTALof less than 1000.
Which three DELETEstatements execute successfully?
DELETE order_id FROM orders WHERE order_total < 1000;

A. DELETE FROM orders;
B. DELETE orders WHERE order_total < 1000;
C. DELETE * FROM orders WHERE order_total < 1000;
D.
E. DELETE FROM orders WHERE order_total < 1000;

Answer: B,C,D

NEW QUESTION # 411
Examine the description of the PROMTIONS table:

You want to display the unique promotion costs in each promotion category.
Which two queries can be used?

A. SELECT DISTINCT promo_category, promo_cost FROM promotions ORDER BY 1;
B. SELECT promo_cost, | pxomo_category FROM promotions ORDER BY 1;
C. SELECT promo_category, DISTINCT promo_cost PROM promotions ORDER BY 2:
D. SELECT DISTINCT promo_cost ||' in' II DISTINCT promo_category FROM promotions ORDER BY
1;
E. SELECT DISTINCT promo_category ||'has'|| promo_cost AS COSTS FROM promotions ORDER BY
1;

Answer: A,E

NEW QUESTION # 412
......

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