Oracle Database 23ai SQL Associate : 1Z0-171

  • Exam Code: 1Z0-171
  • Exam Name: Oracle Database 23ai SQL Associate
  • Q & A: 111 Questions and Answers

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Oracle 1Z0-171 Exam Syllabus Topics:

SectionObjectives
Topic 1: Relational Database Concepts- Database fundamentals and relational model
  • 1. Tables, rows, columns, and keys
    • 2. Entity relationships and normalization basics
      Topic 2: Retrieving Data Using SQL- SELECT statements
      • 1. Sorting results with ORDER BY
        • 2. Column selection and expressions
          • 3. Filtering with WHERE clause
            - Joins and Subqueries
            • 1. Inner and outer joins
              • 2. Correlated and non-correlated subqueries
                Topic 3: Data Manipulation Language (DML)- Insert, Update, Delete operations
                • 1. Transaction control (COMMIT, ROLLBACK)
                  • 2. Data integrity considerations
                    Topic 4: Advanced SQL Features- Aggregations and grouping
                    • 1. Aggregate functions
                      • 2. GROUP BY and HAVING
                        - Set operators and functions
                        • 1. Single-row and group functions
                          • 2. UNION, INTERSECT, MINUS
                            Topic 5: Data Definition Language (DDL)- Schema objects
                            • 1. Views and indexes
                              • 2. Tables and constraints

                                Oracle Database 23ai SQL Associate Sample Questions:

                                1. What is the purpose of the MERGE statement in SQL?

                                A) To update existing rows or insert new rows in a target table
                                B) To delete duplicate rows from a table
                                C) To combine the results of two queries
                                D) To join two tables into one


                                2. Which SQL keyword is used to define a substitution variable in a SQL statement?

                                A) SUBSTITUTION
                                B) SET
                                C) DEFINE
                                D) VAR


                                3. What will the following query return?
                                SELECT EXTRACT(YEAR FROM CURRENT_DATE) AS year FROM dual;

                                A) An error due to incorrect syntax
                                B) The current year in the database time zone
                                C) The full date in the session time zone


                                4. Which data dictionary view provides information about all tables accessible to the current user?

                                A) SESSION_TABLES
                                B) DBA_TABLES
                                C) ALL_TABLES
                                D) USER_TABLES


                                5. What will the following query do?
                                SELECT employee_id, salary
                                FROM employees
                                WHERE salary > (SELECT AVG(salary) FROM employees);

                                A) Return employees with a salary below the average salary
                                B) Return all employees and their salaries
                                C) Return employees with a salary above the average salary
                                D) Return employees with a salary equal to the average salary


                                Solutions:

                                Question # 1
                                Answer: A
                                Question # 2
                                Answer: C
                                Question # 3
                                Answer: B
                                Question # 4
                                Answer: C
                                Question # 5
                                Answer: C

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