Data StorageIn the following Entity Relationship Diagram, what type of relationship exists between the fact table and the product table.
Question
Data Storage
In the following Entity Relationship Diagram, what type of relationship exists between the fact table and the product table?
Solution
To determine the type of relationship between the fact table and the product table in an Entity Relationship Diagram (ERD), we would generally consider the following steps:
1. Analyze the ERD
- Identify the entities involved: In this case, we have a fact table and a product table.
- Look at the connecting lines and symbols in the ERD: These lines typically indicate relationships, with annotations defining the nature of the relationships (e.g., one-to-one, one-to-many, many-to-many).
2. Define Relationship Types
- One-to-One (1:1): Each record in one table is related to exactly one record in another table.
- One-to-Many (1:N): A record in one table can be associated with multiple records in another table, but a record in the second table can only be associated with one record in the first.
- Many-to-Many (M:N): Records in both tables can relate to multiple records in each other.
3. Specify the Nature of the Relationship
- If the fact table refers to multiple entries in the product table (e.g., multiple sales of different products), it is likely a One-to-Many (1:N) relationship.
- If each product entry relates to multiple fact records (e.g., different sales facts for the same product), then it might be a Many-to-Many (M:N) relationship.
- If there is a unique entry in both tables correlating directly, it could be One-to-One (1:1).
Final Answer
Without viewing the ERD, I cannot specify the exact type of relationship. However, if the fact table records multiple transactions related to products, it’s typically a One-to-Many (1:N) relationship from the product table to the fact table. If you have access to the ERD, please check for the specific notations to confirm.
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