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Which database level is closest to the users?
External database level is closest to the users.
The Incident table, with an auto-incrementing incident number, etc, looks like: incident_num reporter date time incide
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A relation has: Relational Schema Relation instance Relational Schema: A relational schema shows the relation's name, its attributes and the domain of every a
The State of NewYork certifies firefighters throughout state and keep track all of them, as well as of the state’s fire departments. Each fire department has unique department numb
what is Mapping Constraints? with examples
Normal 0 false false false EN-IN X-NONE X-NONE MicrosoftInternetExplorer4
Describe the Composite Key Composite Key: Sometimes one key is not enough to uniquely recognize a row. E.g. in a single class Roll is enough to search a student, but in the w
List the requirements needed to design a trigger. The requirements are:- Specifying when a trigger is to be implemented. State the actions to be taken when the trigger im
What is Normalization? Database normalization is a data design and organization method applied to data structures based on rules that help building relational databases. In rel
The Enhanced Entity Relationship Diagram (ERD) produced with a drawing or case tool. Your EERD must use a ''standard'' notation style such as Crows Foot or Chen. Please note that t
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