Data Management and Manipulation
One-to-Many Merge
A single policy record may correctly attach to many person or visit records.
Page 1 of 7 · Big Picture
The big picture: One-to-Many Merge
How can one policy record correctly attach to many observations?
Why a policy analyst should care
Attaching one contextual record to many observations is common in policy research, but the direction of the relationship must match what each row represents.
Follow the idea from the opening question to a practical decision. These are the conceptual moves this module will develop:
1 Question How does one record attach to many rows?
2 Explore A state policy example
3 Formalize Merge 1:m by the shared key
4 Transfer Audit a one-to-many merge
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