Assume that Marcia’s has the following personnel: two owners, a shift manager, a parttime seamstress, and two salesclerks. Prepare a two-to-three-page memo that addressesthe following points:1. The need for database administration.2. Your recommendation as to who should serve as database administrator. Assume that Marcia’s is not sufficiently large to need or afford a full-time database administrator.3. Using the main topics in this chapter as a guide, describe the nature of database administration activities at Marcia’s. As an aggressive consultant, keep in mind that you can recommend yourself for performing some of the DBA functions.

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Concurrency Control

The simultaneous occurrence of two or more operations is called concurrence and the situation is called concurrency. In concurrency, the function of one operation can affect the function of the other and put data integrity at risk. Hence, management for the control of concurrency is required. The management or controlling system in the Database Management System (DBMS) that coordinates concurrent access is called the concurrency control system.