Valid Oracle 1z1-071 Test Online - Exam 1z1-071 Objectives

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Oracle 1z1-071 Exam Syllabus Topics:

Section	Weight	Objectives
Topic 1: Displaying Data from Multiple Tables	15%	- Cartesian products - Self-joins and outer joins - Equijoins and non-equijoins
Topic 2: Relational Database Concepts	10%	- ERD and SQL statement mapping - Relationship between database and SQL - Theoretical and physical aspects of relational databases
Topic 3: Aggregating Data Using Group Functions	10%	- Handling NULLs in group functions - GROUP BY and HAVING clauses - SUM, AVG, COUNT, MAX, MIN functions
Topic 4: Retrieving Data Using SQL SELECT Statement	20%	- Column aliases, concatenation, literals and DISTINCT - Arithmetic operations and NULL handling - SELECT statement syntax and usage
Topic 5: Manipulating Data and Managing Transactions		- INSERT, UPDATE, DELETE, MERGE statements - Transaction control: COMMIT, ROLLBACK, SAVEPOINT - Multi-table inserts
Topic 6: Using Data Dictionary Views		- Retrieve metadata and object information
Topic 7: Using Subqueries to Solve Queries		- Correlated subqueries for update/delete - Single-row and multi-row subqueries
Topic 8: Using SET Operators		- Ordering results with set operations - UNION, UNION ALL, INTERSECT, MINUS operators
Topic 9: Managing Views		- Updatable and read-only views - Create, modify and drop views
Topic 10: Controlling User Access		- System and object privileges - Roles, granting and revoking privileges
Topic 11: Working with Time Zones and Date/Time Data		- TIMESTAMP, INTERVAL data types - Time zone conversion functions
Topic 12: Managing Indexes, Synonyms and Sequences		- Create and use synonyms - Create and use sequences - Create and maintain indexes
Topic 13: Managing Tables and Constraints		- Temporary and external tables - Data types, creating/altering/dropping tables - Constraints: primary key, foreign key, unique, check, not null
Topic 14: Using Single-Row Functions to Customize Output	20%	- Nested functions usage - Character, number, and date functions
Topic 15: Conversion Functions and Conditional Expressions	10%	- NVL, NULLIF, COALESCE and CASE expressions - Implicit and explicit data type conversion - TO_CHAR, TO_NUMBER, TO_DATE functions
Topic 16: Restricting and Sorting Data	15%	- WHERE clause and filtering conditions - Operator precedence - Substitution variables, DEFINE and VERIFY commands - ORDER BY clause and sorting rules

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Oracle Database SQL Sample Questions (Q316-Q321):

NEW QUESTION # 316
Examine the description of the CUSTOMERS table:
Which three statements will do an implicit conversion?

A. SELECT * FROM customers WHERE customer_id='0001';
B. SELECT * FROM customers WHERE insert_date'01-JAN-19';
C. SELECT * FROM customers WHERE insert_date=DATE'2019-01-01';
D. SELECT * FROM customers WHERE customer_id=0001;
E. SELECT * FROM customers WHERE TO_DATE(insert_date)=DATE'2019-01-01';
F. SELECT * FROM customers WHERE TO_CHAR(customer_id)='0001';

Answer: A,B,E

NEW QUESTION # 317
You execute these commands:
CREATE TABLE customers (customer_id INTEGER, customer_name VARCHAR2 (20) ) TNSERT INTO customers VALUES (1, 'Customer 1 ' ) ; SAVEPOTNT post_insert; INSERT INTO customers VALUES (2, 'Customer 2');
<TODO>
SELECT COUNT(*) FROM customers;
Which two, used independently, can replace <todo> so the query returns 1?

A. commit;
B. ROLLBACK,"
C. COMMIT TO SAVEPOINT post_insert;
D. ROLLBACK TO post_insert;
E. ROLLBACK TO SAVEPOINT post_insert;

Answer: D,E

NEW QUESTION # 318
View the Exhibit and examine the details of the PRODUCT_INFORMATION table. (Choose two.)

Evaluate this SQL statement:
SELECT TO_CHAR(list_price,'$9,999')
From product_information;
Which two statements are true regarding the output? (Choose two.)

A. A row whose LIST_PRICE column contains value 1123.90 would be displayed as $1,123.
B. A row whose LIST_PRICE column contains value 11235.90 would be displayed as #######.
C. A row whose LIST_PRICE column contains value 1123.90 would be displayed as $1,124.
D. A row whose LIST_PRICE column contains value 11235.90 would be displayed as $1,123.

Answer: B,C

NEW QUESTION # 319
Examine the structure of the ORDERS table:

You want to find the total value of all the orders for each year and issue this command:
SQL> SELECT TO_CHAR(order_date,'rr'), SUM(order_total) FROM orders
GROUP BY TO_CHAR(order_date, 'yyyy');
Which statement is true regarding the result? (Choose the best answer.)

A. It executes successfully and gives the correct output.
B. It returns an error because the TO_CHAR function is not valid.
C. It return an error because the datatype conversion in the SELECT list does not match the data type conversion in the GROUP BY clause.
D. It executes successfully but does not give the correct output.

Answer: C

NEW QUESTION # 320
Which two are true about creating tables in an Oracle database?

A. A create table statement can specify the maximum number of rows the table will contain.
B. The same table name can be used for tables in different schemas.
C. A primary key constraint is manadatory.
D. A system privilege is required.
E. Creating an external table will automatically create a file using the specified directory and file name.

Answer: B,D

Explanation:
Regarding creating tables in an Oracle database:
* B. The same table name can be used for tables in different schemas: In Oracle, a schema is essentially a namespace within the database; thus, the same table name can exist in different schemas without conflict, as each schema is distinct.
* C. A system privilege is required: To create tables, a user must have the necessary system privileges, typically granted explicitly or through roles such as CREATE TABLE or administrative privileges depending on the environment setup.
Incorrect options for all three repeated questions:
* A: Oracle SQL does not allow specifying the maximum number of rows directly in a CREATE TABLE statement; this is controlled by storage allocation and database design rather than table creation syntax.
* D: Creating an external table does not create the physical file. It merely creates a table structure that allows access to data stored in an external file specified in the directory; the file itself must already exist or be managed outside of Oracle.
* E: A primary key constraint is not mandatory for creating tables. While it is a common practice to define a primary key to enforce entity integrity, it is not required by the Oracle SQL syntax for table creation.
These answers and explanations are aligned with Oracle Database 12c SQL documentation and standard practices.

NEW QUESTION # 321
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