Evidence Check: Choose the Data Model

A school robotics team needs to store members, events, robot test runs, sensor notes, and photos.

Your evidence

Create a data-model decision that includes:

1. A list of the main entities or document types.
2. Three relationships the system must preserve.
3. One query the system must answer reliably.
4. A relational design sketch.
5. A non-relational design sketch.
6. Your choice and two reasons.
7. One condition that would make you change your choice.

Check your reasoning

“SQL is structured” and “NoSQL is flexible” are not enough. Tie the choice to the actual relationships and queries.

Done when

Your design can answer the required query and your chosen model has a stated tradeoff rather than a generic advantage list.