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Oracle 1Z1-171 Exam Syllabus Topics:

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

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Oracle Database 23ai SQL Associate Sample Questions (Q92-Q97):

NEW QUESTION # 92
What is the result of the following SQL query?
SELECT COALESCE(NULL, 100, 200) AS result FROM dual;

A. 0
B. 1
C. 2
D. NULL

Answer: C

NEW QUESTION # 93
What happens when a unique index is created on a table column?

A. The column can only contain NULL values.
B. The column values are automatically encrypted.
C. The column data type is converted to a primary key.
D. The column cannot contain duplicate values.

Answer: D

NEW QUESTION # 94
What is the purpose of a correlated subquery?

A. A subquery that references columns from the outer query
B. A subquery that depends on the result of another subquery
C. A subquery that can be used only with aggregate functions
D. A subquery that combines data from multiple tables

Answer: A

NEW QUESTION # 95
What is the result of the following query?
SELECT employee_id
FROM employees
WHERE EXISTS (SELECT 1 FROM departments WHERE department_id = 10);

A. All employee IDs
B. Employee IDs from departments with no employees
C. Employee IDs from department 10
D. Employees with salaries greater than 10

Answer: A

NEW QUESTION # 96
Which command creates a new role in Oracle Database?

A. ADD ROLE role_name;
B. CREATE NEW ROLE role_name;
C. CREATE ROLE role_name;

Answer: C

NEW QUESTION # 97
......

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