Brush up on Databases
Thursday, July 30, 2015
ER-diagram with one-to-one cardinality ratio
ER-diagram with one-to-one cardinality ratio:
Assumption: 1 department has 1 manager.
The given ER diagram has cardinality ratio 1:1 because 1 department has 1 manager and 1 manager manages 1 department.
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