1. Read a relational schema and declare grain
TASK: Draw the three-table relationship diagram. Execute inspect_keys and list each primary/foreign key and its grain.
Your method:
Your evidence/result:
Limitations and next action:


2. Run an explicit SELECT in a local client
TASK: Run select_projection, then remove ORDER BY in a working query. Explain why an apparently unchanged result is not an ordering guarantee.
Your method:
Your evidence/result:
Limitations and next action:


3. Validate relationships before trusting analysis
TASK: Run relationship_audit and draft a source contract. In a separate in-memory copy, try a line with an absent order while foreign keys are enabled.
Your method:
Your evidence/result:
Limitations and next action: