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Oracle 1z0-071 Exam Syllabus Topics:

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

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Oracle Database SQL Sample Questions (Q94-Q99):

NEW QUESTION # 94
View the Exhibit and examine the structure of the EMPLOYEES and JOB_HISTORY tables. (Choose all that apply.)

Examine this query which must select the employee IDs of all the employees who have held the job SA_MAN at any time during their employment.
SELECT EMPLOYEE_ID
FROM EMPLOYEES
WHERE JOB_ID = 'SA_MAN'
-------------------------------------
SELECT EMPLOYEE_ID
FROM JOB_HISTORY
WHERE JOB_ID = 'SA_MAN';
Choose two correct SET operators which would cause the query to return the desired result.

A. UNION
B. MINUS
C. INTERSECT
D. UNION ALL

Answer: A,D

NEW QUESTION # 95
The EMPLOYEES table contains columns EMP_ID of data type NUMBER and HIRE_DATE of data type DATE You want to display the date of the first Monday after the completion of six months since hiring.
The NLS_TERRITORY parameter is set to AMERICA in the session and, therefore, Sunday is the first day of the week Which query can be used?

A. SELECT emp_id,NEXT_DAY(ADD_MONTHS(hire_date,6),1) FROM employees;
B. SELECT emp_id,NEXT_DAY(ADD_MONTHS(hite_date,6),'MONDAY') FROM employees;
C. SELECT emp_id,NEXT_DAY(MONTHS_BETWEEN(hire_date,SYSDATE),6) FROM employees;
D. SELECT emp_id,ADD_MONTHS(hire_date,6), NEXT_DAY('MONDAY') FROM employees;

Answer: B

NEW QUESTION # 96
Examine this description of the PRODUCTS table:

Rows exist in this table with data in all the columns. You put the PRODUCTS table in read-only mode.
Which three commands execute successfully on PRODUCTS?

A. ALTER TABLE products SET UNUSED (expiry_date);
B. TRUNCATE TABLE products;
C. DROP TABLE products;
D. CREATE INDEX price_idx ON products (price);
E. ALTER TABLE products DROP UNUSED COLUMNS;
F. ALTER TABLE products DROP COLUMN expiry_date;

Answer: B,C,D

NEW QUESTION # 97
Which three statements are true about dropping and unused columns in an Oracle database?

A. A column that is set to NNUSED still counts towards the limit of 1000 columns per table.
B. A primary key column referenced by another column as a foreign key can be dropped if using the CASCADE option.
C. An UNUSED column's space is remained automatically when the row containing that column is next queried.
D. An UNUSED column's space is remained automatically when the block containing that column is next queried.
E. Partition key columns cannot be dropped.
F. A DROP COLUMN command can be rolled back.

Answer: A,E,F

Explanation:
* A. A primary key column referenced by another column as a foreign key can be dropped if using the CASCADE option. (Incorrect) Primary key columns that are referenced by foreign keys cannot be dropped as it would violate referential integrity. The CASCADE option does not apply in this context.
* B. A DROP COLUMN command can be rolled back. (Correct)
Dropping a column from a table is a transactional operation. If it's not committed, it can be rolled back.

NEW QUESTION # 98
View the exhibit and examine the structure and data in the INVOICE table.

Which two SQL statements would execute successfully? (Choose two.)

A. SELECT AVG( inv_date -SYSDATE), AVG(inv_amt)
FROM invoice
B. SELECT AVG(inv_date)
FROM invoice
C. SELECT MAX(inv_date), MIN(cust_id)
FROM invoice
D. SELECT MAX(AVG(SYSDATE -inv_date))
FROM invoice

Answer: A,C

NEW QUESTION # 99
......

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