Create a database named Amazon using the attributes.Create individual tables based on below attributes Customers Products Product_types Orders Customer payment methods Tacking Order status Shipments Invoice create different tables and mention their primary keys and foreign keys Describe atleast 6 business rules create Entity Relationship Diagram.The ERD should be in Crow's Foot Model.It should include all the appropriate entities,connectivity,cardinalities and relationship participation. 4 sample queries in plain English and their SQL SELECT statements

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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.