Web(C) It is the data contained in database that is secured. (D) It is the data contained in database that is shared. Answer: (B) Explanation : Data integrity means that the data must be valid according to the given constraints. Therefore, the data is accurate and consistent. Q 15. What are the desirable properties of a decomposition (A) Partition ... WebParticipation constraint •Specifies whether existence of entity depends on its being related to another entity •Types: total and partial •Thus minimum number of relationship instances in which entities can participate: thus1 for total participation, 0 for partial •Diagrammatically, use a double line from relationship type to entity type
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Web18 Jun 2024 · In a Relationship, Participation constraint specifies the existence of an entity when it is related to another entity in a relationship type. It is also called minimum … Web13 May 2024 · Enhanced ER models are advanced database diagrams that are very similar to regular ER diagrams which represent the requirements and complexities of complex databases. In a nutshell, it is a hybrid of ER models with some additional complexities. The Enhanced ER Diagram is a diagrammatic technique used to represent Enhanced ER Models. kinship stories
Difference between identifying and non-identifying relationships
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