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Oracle 1z1-071 Exam Syllabus Topics:

Section	Weight	Objectives
Using Subqueries to Solve Queries	15%	- Write single-row and multi-row subqueries - Define subqueries - Describe the types of problems that subqueries can solve - List the types of subqueries
Using DDL Statements to Create and Manage Tables	14%	- Categorize the main database objects - Drop, rename, and truncate tables - Review the table structure - Alter table definitions - Create a simple table - Describe the data types that are available for columns
Using Conversion Functions and Conditional Expressions	10%	- Apply the NVL, NULLIF, and COALESCE functions to data - Use conditional IF THEN ELSE logic in a SELECT statement - Describe implicit and explicit data type conversion - Use the TO_CHAR, TO_NUMBER, and TO_DATE conversion functions
Working with Oracle Database SQL	8%	- Explain the installation of Oracle Database software - Describe the Oracle Database architecture - Start up and shut down a database - Create a container database
Creating Other Schema Objects	10%	- Create, modify, and retrieve data from a view - Create, maintain, and use sequences - Create and maintain indexes - Create synonyms for database objects
Restricting and Sorting Data	6%	- Limit the rows that are retrieved by a query - Sort the rows that are retrieved by a query - Use DEFINE and UNDEFINE commands - Use ampersand substitution to restrict and sort output at runtime
Displaying Data from Multiple Tables Using Joins	15%	- Write SELECT statements to access data from more than one table using equijoins and non-equijoins - Join a table to itself by using a self-join - Cross join tables - View data that does not meet a join condition by using outer joins
Retrieving Data Using the SQL SELECT Statement	5%	- List the capabilities of SQL SELECT statements - Execute a basic SELECT statement - Differentiate between SQL statements and SQL*Plus commands
Using Single-Row Functions to Customize Output	10%	- Manipulate strings with character function in the SELECT and WHERE clauses - Manipulate numbers with the ROUND, TRUNC, and MOD functions - Describe the differences between single-row and multiple-row functions - Manipulate dates with the date functions - Perform arithmetic with date data
Using Set Operators	5%	- Describe set operators - Use a set operator to combine multiple queries into a single query - Describe the order of precedence when the set operators are used
Controlling User Access	5%	- Grant privileges on tables and on a view - Differentiate system privileges from object privileges - Distinguish between granting privileges and roles
Reporting Aggregated Data Using Group Functions	15%	- Describe the use of group functions - Group data by using the GROUP BY clause - Identify the available group functions - Include or exclude grouped rows by using the HAVING clause
Manipulating Data	14%	- Describe each data manipulation language (DML) statement - Delete rows from a table - Control transactions - Insert rows into a table - Update rows in a table

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Oracle Database SQL Sample Questions (Q298-Q303):

NEW QUESTION # 298
Examine this business rule:
Each student can work on multiple projects and earth project can have multiple students.
You must decide an Entity Relationship (ER) model for optional data storage and allow generating reports in this format:
STUDENT_ID FIRST_NAME LAST_NAME PROJECT_ID PROJECT_NAME PROJECT_TASK Which two statements are true?

A. STUDENT_ID must be the primary key in the STUDENTS entity and foreign key in the PROJECTS entity.
B. PROJECT_ID must be the primary key in the PROJECTS entity and foreign key in the STUDENTS entity.
C. The ER must have a 1-to-many relationship between the STUDENTS and PROJECTS entities.
D. An associative table must be created with a composite key of STUDENT_ID and PROJECT_ID, which is the foreign key linked to the STUDENTS and PROJECTS entities.
E. The ER must have a many-to-many relationship between the STUDENTS and PROJECTS entities that must be resolved into 1-to-many relationships.

Answer: D,E

NEW QUESTION # 299
Which two statements are true about * _TABLES views?

A. All users can query DBA_TABLES successfully.
B. You must have ANY TABLE system privileges, or be granted object privileges on the table, to view a table in ALL_TABLES.
C. USER TABLES displays all tables owned by the current user.
D. You must have ANY TABLE system privileges, or be granted object privilges on the table, to viewa tabl e in DBA TABLES.
E. ALL TABLES displays all tables owned by the current user.
F. You must have ANY TABLE system privileges, or be granted object privileges on the table, to view a table in USER_TABLES.

Answer: C,E

Explanation:
In Oracle, *_TABLES views provide information about tables.
B). USER_TABLES displays all tables owned by the current user, making this statement true. No additional privileges are required to see your own tables.
D). ALL_TABLES displays all tables that the current user has access to, either through direct ownership or through privileges, making this statement true.
A, C, E, and F are incorrect. Specifically:
* A and E are incorrect because you do not need ANY TABLE system privileges to view tables in DBA_TABLES or ALL_TABLES; you need the SELECT_CATALOG_ROLE or equivalent privileges.
* C is incorrect because as a user, you do not need additional privileges to see your own tables in USER_TABLES.
* F is incorrect because not all users can query DBA_TABLES; this requires specific privileges or roles.
References:
* Oracle Database Reference, 12c Release 1 (12.1): "Static Data Dictionary Views"

NEW QUESTION # 300
Which three statements about roles are true?

A. A single role can be assigned to multiple users.
B. Privileges are assigned to a role using the ALTER ROLE statement.
C. Roles are assigned to roles using the ALTER ROLE statement.
D. A single user can be assigned multiple roles.
E. Privileges are assigned to a role using the GRANT statement.
F. Roles are assigned to users using the ALTER USER statement.
G. A role is a named group of related privileges that can only be assigned to a user.

Answer: A,D,E

Explanation:
Roles in Oracle Database are designed to simplify the management of privileges. The following statements about roles are true:
* B: A single user can indeed be assigned multiple roles. This allows for easy management of user privileges as they can be grouped into roles, and these roles can be granted to users.
* D: A single role can be assigned to multiple users. This is one of the primary purposes of roles, to provide an efficient way to grant the same set of privileges to different users.
* G: Privileges are granted to a role using the GRANT statement. This allows the role to encapsulate the privileges which can then be granted to users.
The incorrect options are:
* A: Roles cannot be assigned to other roles using the ALTER ROLE statement; they are granted to other roles using the GRANT statement.
* C: Roles are not assigned to users using the ALTER USER statement; roles are granted to users using the GRANT statement.
* E: Privileges are not assigned to a role using the ALTER ROLE statement; they are granted using the GRANT statement.
* F: A role is not limited to being assigned to just one user; it can be assigned to multiple users.
References:
* Oracle Documentation on Roles: Database Security Guide - Roles
* Oracle Documentation on the GRANT statement: SQL Language Reference - GRANT

NEW QUESTION # 301
Which two statements about INVISIBLE indexes are true?

A. an INVISIBLE Index consumes no storage
B. All INSERT, UPDATE, and DELETE statements maintain entries in the index
C. You can only create one INVISIBLE index on the same column list
D. The query optimizer never considers INVISIBLE Indexes when determining execution plans
E. You use AlTER INDEX to make an INVISIBLE Index VISIBLE

Answer: B,E

Explanation:
INVISIBLE indexes are a feature in Oracle Database 12c and later versions that allow an index to be maintained but not used by the optimizer unless explicitly hinted.
A). False. An INVISIBLE index still consumes storage space as it is maintained in the background.
B). False. There is no such restriction. You can create multiple INVISIBLE indexes on the same column list.
C). False. The optimizer can consider INVISIBLE indexes if they are hinted at in the query.
D). True. You can alter the visibility of an index using the ALTER INDEX command to make an INVISIBLE index VISIBLE.
E). True. Even though they are invisible to the optimizer by default, all DML operations such as INSERT, UPDATE, and DELETE continue to maintain the index as they would with a VISIBLE index.

NEW QUESTION # 302
View the Exhibit and examine the ORDERS table.
The ORDERS table contains data and all orders have been assigned a customer ID. Which statement would add a NOT NULL constraint to the CUSTOMER_ID column?

A. ALTER TABLE orders
MODIFY customer_id CONSTRAINT orders_cust_id_nn NOT NULL;
B. ALTER TABLE orders
MODIFY CONSTRAINT orders_cust_id_nn NOT NULL (customer_id);
C. ALTER TABLE orders
ADD customer_id NUMBER(6)CONSTRAINT orders_cust_id_nn NOT NULL;
D. ALTER TABLE orders
ADD CONSTRAINT orders_cust_id_nn NOT NULL (customer_id);

Answer: A

NEW QUESTION # 303
......

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