Write the proper sequence of activities in the design of a video rental database. (The initial ERD was shown in Figure 9.9.) The design must support all rental activities, customer payment tracking, and employee work schedules, as well as track which employees checked out the videos to the customers. After you finish writing the design activity sequence, complete the ERD to ensure that the database design can be successfully implemented. (Make sure that the design is normalized properly and that it can support the required transactions.
Answer to relevant QuestionsExplain the following statement: a transaction is a logical unit of work.What is a scheduler, what does it do, and why is its activity important to concurrency control?Why might it take a long time to complete transactions when an optimistic approach to concurrency control is used?Assuming that pessimistic locking is being used, but the two-phase locking protocol is not, create a chronological list of the locking, unlocking, and data manipulation activities that would occur during the complete ...What DBMS component is responsible for concurrency control? How is this feature used to resolve conflicts?
Post your question