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Oracle 1Z0-171 Exam Syllabus Topics:

Section	Weight	Objectives
Topic 1: Displaying Data from Multiple Tables	10%	- Cartesian products - Different types of joins: equijoin, non-equijoin, outer join, self-join
Topic 2: DDL for Tables and Relationships	15%	- TRUNCATE TABLE statement - Temporary and external tables - Constraints management - Table structure, columns, data types - Views management - Drop columns, set unused columns - CREATE TABLE statement
Topic 3: Data Dictionary and Time Zones	5%	- INTERVAL data types - CURRENT_DATE, CURRENT_TIMESTAMP, LOCALTIMESTAMP - Using data dictionary views
Topic 4: Managing Indexes, Synonyms, Sequences	5%	- Create and manage sequences - Create and manage indexes - Create and manage synonyms
Topic 5: Retrieving and Sorting Data	15%	- Limiting rows and substitution variables - Operator precedence rules - Sorting query results - Arithmetic expressions and NULL values - Operators, literals, DISTINCT keyword - Using SELECT statement and column aliases - DEFINE and VERIFY commands
Topic 6: Using Functions	25%	- ROUND, TRUNC, MOD functions - Character functions for string manipulation - Group functions and grouping data - Data type conversion: implicit and explicit - Date arithmetic and date functions - NVL, NULLIF, COALESCE functions - TO_CHAR, TO_NUMBER, TO_DATE conversion functions - Nested functions - Restricting group results
Topic 7: Managing Tables with DML	5%	- Multi-table INSERT and MERGE statements - INSERT, UPDATE, DELETE operations - Transaction management and control
Topic 8: Controlling User Access	5%	- System vs object privileges - Roles creation and privilege assignment - Granting privileges on tables
Topic 9: Using SET Operators	5%	- Matching SELECT statements - Using ORDER BY with set operations - UNION, UNION ALL, INTERSECT, MINUS operators
Topic 10: Relational Database Concepts	5%	- Relational database theoretical and physical aspects - SQL SELECT clauses and ERD components - Relationship between database and SQL
Topic 11: Using Subqueries	5%	- Single-row and multi-row subqueries - Correlated subqueries for update and delete

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Oracle Database 23ai SQL Associate Sample Questions (Q36-Q41):

NEW QUESTION # 36
Which of the following SET operators combines results from two queries and removes duplicates?

A. MINUS
B. UNION
C. INTERSECT
D. UNION ALL

Answer: B

NEW QUESTION # 37
What is the difference between UNION and UNION ALL?

A. UNION removes duplicates, while UNION ALL includes all rows, including duplicates.
B. UNION works with subqueries, while UNION ALL does not.
C. UNION includes all rows, while UNION ALL removes duplicates.
D. UNION combines columns, while UNION ALL combines rows.

Answer: A

NEW QUESTION # 38
What is required for the queries combined by a SET operator to work correctly?

A. Both queries must include the WHERE clause.
B. Both queries must use the GROUP BY clause.
C. The tables must be joined using a primary key.
D. The result sets must have the same number of columns and compatible data types.

Answer: D

NEW QUESTION # 39
Which type of subquery returns exactly one value?

A. Multiple-row subquery
B. Scalar subquery
C. Inline view
D. Correlated subquery

Answer: B

NEW QUESTION # 40
What does a Cartesian product in SQL result from?

A. An OUTER JOIN with NULL values
B. An INNER JOIN without specifying join conditions
C. A NATURAL JOIN without specifying join conditions

Answer: B

NEW QUESTION # 41
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