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Oracle 1z1-071 Exam Syllabus Topics:

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

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Oracle Database SQL Sample Questions (Q293-Q298):

NEW QUESTION # 293
View the Exhibit and examine the description of the PRODUCT_INFORMATION table. Which SQL statement would retrieve from the table the number of products having
LIST_PRICE as NULL?

A. SELECT COUNT(DISTINCT list_price)
FROM product_information
WHERE list_price IS NULL;
B. SELECT COUNT(NVL(list_price, 0))
FROM product_information
WHERE list_price IS NULL;
C. SELECT COUNT(list_price)
FROM product_information
WHERE list_price = NULL;
D. SELECT COUNT(list_price)
FROM product_information
WHERE list_price IS NULL;

Answer: B

NEW QUESTION # 294
Which two statements are true about Entity Relationships?

A. A table name can be specified just once when selecting data from a table having a selfreferencing relationship
B. A many-to-many relationship can be implemented only by using foreign keys
C. A one-to-one relationship is always a self-referencing relationship
D. A Relationship can be mandatory for both entities
E. A one-to-many relationship in one direction is a one-to-one relationship in the other direction

Answer: D

Explanation:
A relationship in an Entity-Relationship (ER) model can indeed be mandatory for both entities, meaning that an instance of one entity must relate to one and only one instance of another entity, and vice versa. This is commonly seen in a one-to-one relationship where both sides are mandatory.
Option B is incorrect; a one-to-one relationship does not have to be self-referencing. Self-referencing (or recursive) relationships occur when an entity has a relationship with itself.
Option C is incorrect; a many-to-many relationship typically requires a join table or associative entity with foreign keys that reference the primary keys of the two entities it connects.
Option D is incorrect; in the case of a self-referencing relationship, you may need to use aliases to specify the table more than once to differentiate between the self-referenced columns.
Option E is incorrect because a one-to-many relationship in one direction does not equate to a one-to-one relationship in the opposite direction.
References:
* Entity-Relationship Model Concepts: ER Model

NEW QUESTION # 295
View the Exhibit and examine the details of PRODUCT_INFORMATIONtable.

You have the requirement to display PRODUCT_NAMEfrom the table where the CATEGORY_IDcolumn has values 12or 13, and the SUPPLIER_IDcolumn has the value 102088. You executed the following SQL statement:
SELECT product_name
FROM product_information
WHERE (category_id = 12 AND category_id = 13) AND supplier_id = 102088; Which statement is true regarding the execution of the query?

A. It would execute and the output would display the desired result.
B. It would not execute because the entire WHEREclause condition is not enclosed within the parentheses.
C. It would not execute because the same column has been used in both sides of the ANDlogical operator to form the condition.
D. It would execute but the output would return no rows.

Answer: D

NEW QUESTION # 296
Which two statements cause changes to the data dictionary?

A. DELETE FROM scott. emp;
B. AITER SESSION set NLs. _DATE FORMAT = 'DD/MM/YYYY';
C. GRANT UPDATE ON scott. emp TO fin manager;
D. TRUNCATE TABLE emp:
E. SELECT * FROM user_ tab._ privs;

Answer: C,D

NEW QUESTION # 297
Which statement is true about transactions?

A. A combination of DDL and DML statements executed in a sequence ending with a COMMIT forms a single transaction.
B. A set of DDL statements executed in a sequence ending with a COMMIT forms a single transaction.
C. Each Data Definition Language (DDL) statement executed forms a single transaction.
D. A set of Data Manipulation Language (DML) statements executed in a sequence ending with a SAVEPOINT forms a single transaction.

Answer: C

Explanation:
Explanation
https://docs.oracle.com/database/121/CNCPT/transact.htm#CNCPT038

NEW QUESTION # 298
......

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