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所在平台: Udemy |
课程主页: https://www.udemy.com/course/dbms-advantages-disadvantages-locking-isolation-levels/
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课程名称：数据库管理系统卓越：模块3 概述： 本课程旨在深入探讨数据库管理系统（DBMS）的优点和功能，内容包括以下几个关键主题： 1. DBMS的各种优势。 2. 数据独立性（Data Independence）的含义。 3. 数据冗余（Data Redundancy）的定义。 4. 数据完整性（Data Integrity）是什么。 5. 数据集成（Data Integration）的意义。 6. 数据一致性（Data Consistency）的概念。 7. 数据备份的重要性。 8. DBMS用于确保数据安全的各种安全措施。 9. 可扩展性（Scalability）的含义。 10. 垂直扩展（Vertical Scaling）和水平扩展（Horizontal Scaling）的定义。 11. 缩减（Scaling Down）的含义。 12. DBMS实现并发访问的关键方法。 13. 锁定（Locking）的概念。 14. 读锁（Read Lock）和写锁（Write Lock）的定义。 15. DBMS中锁的好处。 16. 隔离级别（Isolation Levels）的意义。 17. SQL标准中定义的四个隔离级别。 18. 最低的隔离级别。 19. 已提交读隔离级别（Read Committed Isolation Level）的功能。 20. 可重复读隔离级别（Repeatable Read Isolation Level）的作用。 21. 最高的隔离级别。 22. 最高隔离级别与最低隔离级别的区别。 23. 使用DBMS相比传统文件系统的各种好处。 24. DBMS或传统文件系统是否提供定期自动备份。 25. DBMS支持时间点恢复（Point-in-Time Recovery）。时间点恢复的含义。 26. 在数据分析中，DBMS与文件系统哪个更好。 27. DBMS的各种缺点。 28. DBMS是否给组织带来财政负担。 29. DBMS是整个系统的单点故障。这意味着什么？ 30. 扩展DBMS可能面临的困难。 31. 供应商锁定（Vendor Lock-in）的含义。 32. 什么情况下不应使用DBMS系统？为何DBMS对组织至关重要？ 本模块的课程内容将帮助学员更好地理解数据库管理系统在现代数据处理和管理中的重要性及其关键功能。
1. What are the various advantages of DBMS?2. What is meant by Data Independence?3. What is the meaning of Data Redundancy?4. What is meant by Data Integrity?5. What is the meaning of Data Integration?6. What is Data Consistency?7. What is the need of data backup?8. What are the various security measures used by DBMS to ensure data security?9. What is the meaning of scalability?10. What is meant by vertical scaling and horizontal scaling?11. What is meaning of scaling down?12. Which are the key methods used by DBMS to achieve concurrent access to data?13. What is meant by locking?14. What is the meaning of Read Lock and Write Lock?15. What is the benefit of locks used by DBMS?16. What is the meaning of Isolation levels?17. Which are the four isolation levels defined in the SQL standard?18. Which is the lowest Isolation Level?19. What is Read Committed Isolation level?20. What is the function of Repeatable Read Isolation level?21. Which is the highest isolation level?22. Write one difference between Highest Isolation levels and Lower Isolation levels?23. What are the various benefits of using a DBMS over traditonal file-based systems?24. DBMS or traditional file system provides for regular automated backups?25. DBMS supports point-in-time recovery. What is the meaning of point-in-time recovery?26. Which system is better for data analysis - DBMS or File system?27. What are the various disadvantages of DBMS?28. Whether DBMS puts financial burden on the organization?29. DBMS represents a single point of failure for the entire system. What it means?30. Scaling a DBMS can be difficult. Why?31. What is meant by Vendor Lock-in?32. When we should not use DBMS system?Why DBMS is essential for an organization?
