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4 cards from this section. Quick, good the night before a test.
What does an entity represent in a database?
Think about tables in a database.
What is the purpose of attributes in an entity?
Consider what information is stored in each table.
What does 'cardinality' indicate in an ERD?
Think about the relationship between a customer and their orders.
True or False: Attributes are the characteristics of entities.
Remember what information each entity holds.
Design an ERD for an online store including entities like Products, Customers, and Orders. Explain your choices of attributes and relationships.
Think about how online shopping works!
Discuss the impact of normalization on database performance and provide an example of how an unnormalized database may perform poorly.
Consider the difference between storing data once versus multiple times.
5 more questions in this section. Enroll free to practise them all.
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