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Oracle 1Z0-171 Exam Syllabus Topics:

Section	Objectives
Topic 1: Data Definition Language (DDL)	- Schema objects 1. Views and indexes 2. Tables and constraints
Topic 2: Relational Database Concepts	- Database fundamentals and relational model 1. Entity relationships and normalization basics 2. Tables, rows, columns, and keys
Topic 3: 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. Correlated and non-correlated subqueries 2. Inner and outer joins
Topic 4: Data Manipulation Language (DML)	- Insert, Update, Delete operations 1. Transaction control (COMMIT, ROLLBACK) 2. Data integrity considerations
Topic 5: Advanced SQL Features	- Aggregations and grouping 1. GROUP BY and HAVING 2. Aggregate functions - Set operators and functions 1. Single-row and group functions 2. UNION, INTERSECT, MINUS

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Oracle Database 23ai SQL Associate Sample Questions (Q20-Q25):

NEW QUESTION # 20
Which SQL function converts a string representation of a date into a date data type?

A. CAST_TO_DATE
B. CONVERT_TO_DATE
C. DATE_CONVERT
D. TO_DATE

Answer: D

NEW QUESTION # 21
Which SET operator returns rows from the first query that are not present in the second query?

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

Answer: A

NEW QUESTION # 22
What does the UNION ALL operation do when selecting matching columns from different tables?
SELECT employee_id, salary FROM employees
UNION ALL
SELECT employee_id, bonus FROM bonuses;

A. Combines the salaries and bonuses for employees, removing duplicates
B. Returns only employees with duplicate employee IDs in both tables
C. Returns only the employees with salaries and bonuses
D. Combines all employee IDs, salaries, and bonuses, including duplicates

Answer: D

NEW QUESTION # 23
What does the following query return?
SELECT department_id FROM departments
INTERSECT
SELECT department_id FROM employees;

A. All department IDs from the employees table
B. Department IDs that exist only in the employees table
C. Department IDs that exist in both the departments and employees tables
D. All department IDs from the departments table

Answer: C

NEW QUESTION # 24
Which clause in an UPDATE statement typically uses a subquery to assign values to columns?

A. SET
B. WHERE
C. FROM
D. HAVING

Answer: A

NEW QUESTION # 25
......

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