What type of relationships did you build between the tables?

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BlackTom AI · Accepted Answer

Question restatement: What type of relationships did you build between the tables? 
Options presented: 
- Many-to-many 
- One-to-one 
- One-to-many

Option 1: Many-to-many. This would imply that records in both tables can be associated with multiple records on the other side, requiring a junction or linking table to map associations. If your design used a simple direct foreign key in one table pointing to the other, a many-to-many relationship would not be implemented correctly, so this choice is typically incorrect in straightforward relational designs.

Option 2: One-to-one. A one-to-one relationship means each row in Table A corresponds to exactly one row in Table B, and vice versa. This is usually used when splitting a table for optional extensions or enforcing data separation for security or performance reasons. If you actually created a structure where a single parent record relates to multiple child records, or where multiple records in B relate to the same A, this option would be false. In most common scenarios, especially when you’re asked about “the relationships you built,” a purely one-to-one link would be less typical unless there’s a clear 1:1 mapping.

Option 3: One-to-many. This relationship means a single record in the parent table can be related to multiple records in the child table, while each child record relates to only one parent. This is the most common relational pattern for representing lists or collections (e.g., a single customer having many orders, a single category containing many products). If you designed the schema with a foreign key in the child table pointing to the parent, this describes a 1:N relation accurately, making this option the appropriate choice in standard scenarios.

Why the other options are not correct in typical relational designs:
- Many-to-many would require an extra junction table to pair records from both tables, which isn’t implied by the simple question and is not the default interpretation in a basic one-to-many design.
- One-to-one would imply a strict 1:1 mapping with no child records beyond the single pair, which is not as common for “relationships between the tables” in everyday database modeling unless specifically stated.

Why option 3 aligns with common practice: In most database schemas where you model a natural hierarchy or list-like relationships, a single parent can have many children, reflecting a one-to-many relationship. This pattern supports referential integrity via a foreign key on the child table referencing the parent, and it matches the typical data modeling intuition for “between the tables” connections.

ACS19E1 - Microsoft Access 2019 Level 1 Online Exam

What type of relationships did you build between the tables?

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