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In a data model, a relationship shows an association between two entities or tables. A relationship is represented as a solid or dashed line that connects two entities or two tables. Depending on the notation you choose, the symbols at either end of the line can change.
If you prefer to work in the Model Explorer, you can see the parent and child relationships for each entity and table in the Model Explorer. Double-click any of the relationship folders to open the Relationship Editor.
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