1Z0-171最新考古題 - 1Z0-171更新

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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: 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
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. Data integrity considerations 2. Transaction control (COMMIT, ROLLBACK)
Topic 5: Relational Database Concepts	- Database fundamentals and relational model 1. Entity relationships and normalization basics 2. Tables, rows, columns, and keys

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最新的 Oracle Database 1Z0-171 免費考試真題 (Q61-Q66):

問題 #61
What will the following SQL query do?
UPDATE employees
SET salary = salary * 1.1
WHERE department_id = 10;

A. Increase the salary of employees in department 10 by 10%
B. Decrease the salary of employees in department 10 by 10%
C. Set the salary to 1.1 for employees in department 10
D. Increase the salary of all employees by 10%

答案：A

問題 #62
Which of the following statements is true about constraints in Oracle Database?

A. Constraints can only be added when creating a table.
B. Constraints are automatically dropped when rows are deleted.
C. Constraints cannot reference other tables.
D. Constraints can be added or modified using the ALTER TABLE statement.

答案：D

問題 #63
What does the following SQL query do?
SELECT *
FROM employees e
JOIN employees m ON e.manager_id = m.employee_id;

A. Lists employees who are not managers
B. Lists employees without departments
C. Lists employees and their corresponding managers
D. Lists employees who are managers

答案：C

問題 #64
Which SQL clause can be used in Oracle to limit the number of rows returned?

A. DISTINCT
B. GROUP BY
C. FETCH FIRST n ROWS ONLY
D. WHERE

答案：C

問題 #65
In a relational database, what is a foreign key?

A. A key that is used to establish a relationship between two tables
B. A temporary key generated during query execution
C. A unique identifier for a record in a table
D. A key used to sort data in a specific order

答案：A

問題 #66
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