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Oracle 1Z0-171 Exam Syllabus Topics:

Section	Objectives
Data Manipulation Language (DML)	- Insert, Update, Delete operations 1. Transaction control (COMMIT, ROLLBACK) 2. Data integrity considerations
Data Definition Language (DDL)	- Schema objects 1. Tables and constraints 2. Views and indexes
Retrieving Data Using SQL	- SELECT statements 1. Column selection and expressions 2. Sorting results with ORDER BY 3. Filtering with WHERE clause - Joins and Subqueries 1. Inner and outer joins 2. Correlated and non-correlated subqueries
Relational Database Concepts	- Database fundamentals and relational model 1. Entity relationships and normalization basics 2. Tables, rows, columns, and keys
Advanced SQL Features	- Aggregations and grouping 1. Aggregate functions 2. GROUP BY and HAVING - Set operators and functions 1. UNION, INTERSECT, MINUS 2. Single-row and group functions

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Oracle Database 23ai SQL Associate Sample Questions (Q17-Q22):

NEW QUESTION # 17
Which SQL function can be used to replace NULL values with a specified value?

A. COALESCE
B. REPLACE
C. NVL
D. ISNULL

Answer: C

NEW QUESTION # 18
What will the following query result in?
SELECT e.employee_id, e.manager_id
FROM employees e
WHERE e.manager_id IS NOT NULL;

A. Employees who do not have managers
B. Employees who have managers
C. All employees and their IDs
D. Employees and their managers' IDs

Answer: B

NEW QUESTION # 19
What is required for the queries combined by a SET operator to work correctly?

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

Answer: C

NEW QUESTION # 20
Which operator can be used in a multiple-row subquery to match a single value to a list of values?

A. IN
B. NOT NULL
C. =
D. EXISTS

Answer: A

NEW QUESTION # 21
Which INTERVAL data type would you use to store a period of time in years and months?

A. INTERVAL YEAR TO MONTH
B. INTERVAL DAY TO SECOND
C. INTERVAL MONTH TO DAY
D. INTERVAL MINUTE TO HOUR

Answer: A

NEW QUESTION # 22
......

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