Mode disclosure
All modes use one coherent workspace; only disclosure and guidance change. Practice mode uses a concise prompt, normal schema, optional hints, and the same local Run and Check pipeline.
Multi-Table Joins and Fact Grain / guided completion
M19-A01 - Path planning - map customer to category through order and line facts
M19-A01 - Path planning - map customer to category through order and line facts. Navigate multiple tables while preserving fact grain and metric source.
- Result grain
- one join-path planning step from customer to product category
- Exact columns
- step_no; from_table; to_table; join_condition; output_grain
SQL editor shortcuts: Ctrl or Command Enter runs the query, Ctrl or Command Shift Enter checks it, Alt H opens the next hint, Ctrl or Command slash toggles a line comment, Ctrl or Command Shift F formats the SQL, and Escape closes transient UI.
Cursor at line 1, column 1.
Scenario
Expand multi-table joins deliberately: follow the customer-to-category path through facts, keep line-item grain, and choose captured fact columns for historical metrics.
Multi-Table Joins and Fact Grain / guided completion
One-sentence task
M19-A01 - Path planning - map customer to category through order and line facts. Navigate multiple tables while preserving fact grain and metric source.
Practice mode disclosure
Concise prompt, normal schema help, optional hints, and the same checker workspace are available.
Structured output contract
- Result grain
- one join-path planning step from customer to product category
- Exact columns
- step_no; from_table; to_table; join_condition; output_grain
- Source population
- Use the prompt setup plus FROM, JOIN, WHERE, and subquery predicates as the source population. Visible rows are only examples.
- Grouping
- Do not collapse rows unless the contract explicitly asks for aggregation, distinct tuples, or set semantics.
- Ordering
- map customer to category through orders and line facts; order by step_no
- Validation
- select-only; hidden deterministic variants.
Relevant tables
Time and difficulty
- Estimated time
- 5 minutes
- Difficulty
- 3/5
Objective and concepts
Practice mode keeps the prompt concise; open hints only if you choose guided help.
Assumptions, dialect notes, and common traps
- Duplicate policy
- Preserve duplicate facts unless the prompt explicitly asks for distinct tuples or set semantics.
- Null policy
- Preserve NULL, empty string, zero, and false as distinct values unless the contract says to display a fallback.
- Tie-breakers
- Use every ordering rule in the contract and end tied business metrics with deterministic secondary keys when needed.
- Zero-related entities
- Do not invent zero rows unless the contract asks for preserved parents, missing entities, or complete periods.
- Numeric tolerance
- Use exact semantic comparison unless the activity explicitly declares a numeric tolerance.
Opened hints
No hints opened yet.