Create an Oracle user and assign appropriate privileges for a schema that will support a unique e-Commerce application. Using PowerPoint, Visio or any graphical tool of your choice, create an Entity Relationship Diagram showing the entities, relationships and primary keys supporting your e-Commerce application. Your application should have at least four (4) entities. The total number of attributes across all entities should be at least fifteen Be sure you use good database design that includes the use of Primary, Foreign, Not Null, and other constraints. Based on your design, create and describe each of your database tables. Populate your tables with records. The records should represent meaningful data and not placeholder data. You should populate at least 20 records total across all of your tables. Create one database view showing the combination of at least two tables resulting from a join. Demonstrate your knowledge of select statements by creating at least six (6) queries that will return different data from your tables and view