An art gallery wants to record data regarding its customers, artists and art projects.

The gallery may have multiple paintings of a particular artist at all times. Paintings may be sold and re-purchased more than one time by the gallery. In other words, the gallery can sell a painting and later on purchase the painting and resell it to the same or another customer.

Data:

John Doe
1 Freedom Street
Liverpool
L1 1DP
Tel: 0843 903 3249

Purchases:

Artist Project Purchase Date Price
13 John Wu 123 The Horse 12/12/2017 1000
28 Jenny Sun 222 Spring 01/03/2018 500
13 John Wu 139 Hunting 04/04/2018 3000
28 Jenny Sun 222 Spring 10/10/2018 600

Task:

  • Normalize the database up to 3NF
  • Provide the logical entity relationship (ER) diagram for the relational database.
  • Provide a potential alternative solution for a non-relational database using denormalization. Justify the approach.
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