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Oracle 1z0-071 Exam Syllabus Topics:

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

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Oracle Database SQL Sample Questions (Q108-Q113):

NEW QUESTION # 108
Examine the structure of the DEPARTMENTS table.

You execute the following command:

Which two statements are true?

A. A new column, COUNTRY, can be added to the DEPARTMENTS table after executing the command.
B. Synonyms existing of the DEPARTMENTS table would have to be re-created.
C. Unique key constraints defined on the COUNTRY column are removed.
D. Indexes created on the COUNTRY column exist until the DROP UNUSED COLUMNS command is executed.
E. Views created in the DEPARTMENTS table that include the COUNTRY column are automatically modified and remain valid.

Answer: A,C

NEW QUESTION # 109
Evaluate the following two queries:

Which statement is true regarding the above two queries?

A. Performance would improve in query 2 only if there are null values in the CUST_CREDIT_LIMIT column.
B. Performance would degrade in query 2.
C. There would be no change in performance.
D. Performance would improve in query 2.

Answer: C

NEW QUESTION # 110
Which three are true about privileges and roles? (Choose three.)

A. A role is owned by the user who created it.
B. A role can contain a combination of several privileges and roles.
C. PUBLIC acts as a default role granted to every user in a database.
D. PUBLIC can be revoked from a user.
E. A user has all object privileges for every object in their schema by default.
F. System privileges always set privileges for an entire database.
G. All roles are owned by the SYS schema.

Answer: B,C,E

Explanation:
https://docs.oracle.com/cd/B19306_01/network.102/b14266/authoriz.htm#i1010570

NEW QUESTION # 111
Which task can be performed by using a single Data Manipulation Language (DML) statement?

A. removing all data only from a single column on which a primary key constraint is defined
B. adding a column constraint while inserting a row into a table
C. removing all data only from a single column on which a unique constraint is defined
D. adding a column with a default value while inserting a row into a table

Answer: C

NEW QUESTION # 112
Examine the description of the PRODUCTS table:

Which three queries use valid expressions?

A. SELECT product_id,unit_price || "Discount", unit_price + surcharge-discount FROM products;
B. SPLECT product_id, expiry_date * 2 FROM products;
C. SELECT ptoduct_id, (expiry_date-delivery_date) * 2 FROM products;
D. SELECT product_id, (unit_price * 0.15 / (4.75 + 552.25)) FROM products;
E. SELEGT product_id, unit_price, unit_price + surcharge FROM products;
F. SELECT produet_id, unit_pricer, 5 "Discount",unit_price+surcharge-discount FROM products;

Answer: C,D,E

Explanation:
B . SELECT product_id, (unit_price * 0.15 / (4.75 + 552.25)) FROM products; C. SELECT product_id, (expiry_date - delivery_date) * 2 FROM products; E. SELECT product_id, unit_price, unit_price + surcharge FROM products; Comprehensive and Detailed Explanation WITH all Reference:
A . This is invalid because "Discount" is a string literal and cannot be used without quotes in an arithmetic operation. Also, there is a typo in unit_pricer, and 'discount' is not a defined column in the table. B. This is valid. It shows a mathematical calculation with unit_price, which is of NUMBER type. Division and multiplication are valid operations on numbers. C. This is valid. The difference between two DATE values results in the number of days between them, and multiplying this value by a number is a valid operation. D. This is invalid because expiry_date is of DATE type and cannot be multiplied by a number. Also, there's a typo: "SPLECT" should be "SELECT". E. This is valid. Both unit_price and surcharge are NUMBER types, and adding them together is a valid operation. F. This is invalid because concatenation operator || is used between a number (unit_price) and a string literal "Discount", which is not enclosed in single quotes, and 'discount' is not a defined column in the table.
In SQL, arithmetic operations on numbers and date arithmetic are valid expressions. Concatenation is also a valid expression when used correctly between string values or literals. Operations that involve date types should not include multiplication or division by numbers directly without a proper interval type in Oracle SQL.
These rules are detailed in the Oracle Database SQL Language Reference, where expressions, datatype precedence, and operations are defined.

NEW QUESTION # 113
......

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