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In database design, what does a one-to-many relationship imply between two tables?

easy📝 Conceptual Q2 of 15
SQL - Table Relationships
In database design, what does a one-to-many relationship imply between two tables?
AMultiple records in the first table link to one record in the second table
BOne record in the first table can be linked to multiple records in the second table
CEach record in both tables is linked to exactly one record in the other
DRecords in both tables are unrelated
Step-by-Step Solution
Solution:

  1. Step 1: Understand relationship types

    A one-to-many relationship means one record in the parent table relates to many records in the child table.

  2. Step 2: Analyze options

    One record in the first table can be linked to multiple records in the second table correctly describes this: one record in the first table links to multiple in the second.

  3. Final Answer:

    One record in the first table can be linked to multiple records in the second table -> Option B

  4. Quick Check:

    One-to-many means one parent, many children [OK]
Quick Trick: One-to-many means one parent, many children [OK]
Common Mistakes:
MISTAKES
  • Confusing one-to-many with many-to-one
  • Thinking both tables have equal record counts
  • Assuming no relationship exists

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