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Weak EntityIn a relational database, a weak entity is an entity that can't be uniquely identified by its own attributes alone, and therefore must use as its primary key both its own attributes and the primary key of an entity it is related to. In Entity relationship diagrams a weak entity set is indicated by a bold rectangle (the entity) connected by a bold arrow to a bold diamond (the relationship).
|  | east cocalico township, pennsylvania
east donegal township, pennsylvania
east drumore township, pennsylvania
east earl township, pennsylvania
east hempfield township, pennsylvania
east lampeter township, pennsylvania
eden township, pennsylvania
elizabeth township, pennsylvania
shape of the universe
skippy
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| congregation for the doctrine of the faith
pearl harbor (movie)
mighty mouse
college park, maryland
english heritage
worcester, massachusetts
betty cooper
burgh castle
steinburg
richard hamming
luiz incio lula da silva
| royal college of science
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william perkin
sergei rachmaninoff
sidekick
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oshun
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oba
oya
biogeography
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shakpana
united nations monitoring, verification and inspection commission
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