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Oracle 1z1-071 Exam Syllabus Topics:

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

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Oracle Database SQL Sample Questions (Q322-Q327):

NEW QUESTION # 322
Which three statements are true? (Choose three.)

A. The USER_CONS_COLUMNSview should be queried to find the names of the columns to which constraints apply.
B. Views with the same name but different prefixes, such as DBA, ALLand USER, reference the same base tables from the data dictionary.
C. Both USER_OBJECTSand CATviews provide the same information about all the objects that are owned by the user.
D. The data dictionary views consist of joins of dictionary base tables and user-defined tables.
E. The usernames of all the users including the database administrators are stored in the data dictionary.
F. The data dictionary is created and maintained by the database administrator.

Answer: A,B,E

Explanation:
Explanation/Reference:
References:
https://docs.oracle.com/cd/B10501_01/server.920/a96524/c05dicti.htm

NEW QUESTION # 323
The SALES table has columns PROD_ID and QUANTITY_SOLD of data type NUMBER. Which two queries execute successfully?

A. SELECT COUNT(prod_id) FROM sales GROUP BY prod_id WHERE quantity_sold> 55000;
B. SELECT prod_id FROM sales WHERE quantity_sold> 55000 AND COUNT(*)> 10 GROUP BY COUNT(*)> 10;
C. SELECT COUNT(prod_id) FROM sales WHERE quantity_sold>55000 GROUP BY prod_id;
D. SELECT prod_id FROM sales WHERE quantity_sold> 55000 AND COUNT(*)> 10 GROUP BY prod_id HAVING COUNT(*)> 10;
E. SELECT prod_id FROM sales WHERE quantity_sold> 55000 GROUP BY prod_id HAVING COUNT(*)> 10;

Answer: C,E

NEW QUESTION # 324
Which three statements are true about time zones, date data types, and timestamp data types in an Oracle database?

A. A TIMESTAMP data type column contains information about year, month, and day
B. The SESSIONTIMEZONE function can return an offset from Universal Coordinated Time (UTC)
C. A TIMESTAMP WITH LOCAL TIMEZONE data type column is stored in the database using the time zone of the session that inserted the row
D. The DBTIMEZONE function can return an offset from Universal Coordinated Time (UTC)
E. The CURRENT_TIMESTAMP function returns data without time zone information

Answer: B,C,D

Explanation:
A: True. The DBTIMEZONE function returns the database's time zone offset from UTC (Coordinated Universal Time). In Oracle 12c, DBTIMEZONE can return the time zone of the database in terms of a region name or as a numeric offset from UTC. This is stated in the Oracle documentation for managing time zones.
B: True. TIMESTAMP WITH LOCAL TIME ZONE is a data type that adjusts the data stored in the database to the time zone of the session that is querying or inserting the data. When data is stored, Oracle converts it from the session time zone to UTC, and upon retrieval, it converts it back to the session time zone. This is a feature designed to allow the same data to be viewed in different time zones automatically, making it highly useful in global applications.
D: True. SESSIONTIMEZONE function returns the time zone offset of the current session from UTC. This is useful for understanding and managing data conversions in applications that are used across different time zones. The time zone can be displayed as an offset from UTC or as a named region depending on the environment settings.

NEW QUESTION # 325
Examine this SQL statement:
SELECT cust_id, cust_last_name "Last Name
FROM customers
WHERE countryid=10
UNION
SELECT custid CUSTNO, cust_last_name
FROM customers
WHERE countryid=30
Identify three ORDER BY clauses, any one of which can complete the query successfully.

A. ORDER BY 2, cust_id
B. ORDERBY2, 1
C. ORDER BY "Last Name"
D. ORDER BY"CUST NO"
E. ORDER BY CUSTNO

Answer: A,B,C

NEW QUESTION # 326
Examine the description of the TRANSACTIONS table:

Which two SQL statements execute successfully?

A. SELECT customer_id AS CUSTOMER-ID, transaction_date AS TRANS_DATE, amount + 100 "DUES AMOUNT" FROM transactions;
B. SELECT customer_id CUSTID, transaction_date TRANS_DATE, amount +100 DUES FROM transactions;
C. SELECT customer_id AS "CUSTOMER-ID", transaction_date AS "DATE", amount + 100 DUES FROM transactions;
D. SELECT customer_id AS "CUSTOMER-ID", transaction_date AS DATE, amount + 100 "DUES" FROM transactions;
E. SELECT customer_id AS 'CUSTOMER-ID', transaction_date AS DATE, amount + 100 'DUES' FROM transactions;

Answer: B,C

NEW QUESTION # 327
......

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