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Q5-2 What is a database? Define the term database. Explain the hierarchy of data and name three elements of a database. Define metadata. Using the example of Student and Office_Visit tables, show how relationships among rows are represented in a database. Define the terms primary key, foreign key, and relational database. Adviser Student AdviserName Email Address 0 StudentNumber StudentName MidTerm (a) 1:N Relationship Between Adviser and Student Entities Adviser TableKey Is AdviserName AdviserName Email Address Jones Jones@myuniv.edu Choi Choi@myuniv.edu Jackson Jackson@myuniv.edu Student TableKey Is StudentNumber Student Number StudentName Mid Term 100 Lisa 90 200 Jennie 85 300 Jason 82 400 Terry 95 C Adviser TableKey Is Adviser Name AdviserName Email Address Jones Jones@myuniv.edu Choi Choi@myuniv.edu Foreign key Jackson Jackson@myuniv.edu column represents Student-Key Is StudentNumber relationship Student Number StudentName Mid Term AdviserName 100 Lisa 90 Jackson 200 Jennie 85 Jackson 300 Jason 82 Choi 400 Terry 95 Jackson (c) Using the AdviserName Foreign Key to Represent the 1:N Relationship