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In the physical database design, referential integrity constraints can be defined. What actions does a referential integrity constraint prevent from occurring when data is inserted in a table that contains this constraint? Consider INSERT, UPDATE, and DELETE actions on both the child and the parent.
Use technology and information resources to research issues in database systems. Write clearly and concisely about relational database management systems using proper writing mechanics and technical style conventions.
The relations given below keep track of airline flight information:Flights(flno: integer, from: string, to: string, distance:integer, departs: time, arrives: time, price: real)Aircraft(aid: integer, aflame: string, cruisingrange: integer)
List the sequence of relational algebra operations needed to implement the queries.
Create a database using Oracle packaged procedure
In talking about database security, some aspects to regard as are Data Integrity, Confidentiality, and Malicious Activity. Illustrate how does database security relate to data integrity?
We want to construct a database for a world-wide package delivery company. Define a set of relational schemas and identify primary and foreign keys. Try not to include redundant schemas.
Suppose that we replace the wait and signal operations of monitors with a single construct await(B), where B is a general Boolean expression. Write a monitor using this scheme to implement the readers--writers problem.
Evaluate the success WellCo and PharmaCARE shareholders
Compute a canonical cover for the above set of functional dependencies (show each step of your derivation with an explanation).
Using Internet as the research tool for extra information not presented in text, describe why application roles are important part of the security model for databases.
Create a database from scratch that contains, at a minimum, the elements listed below
Produce a scatterplot of Rent vs. Size (square meters of the apartment) for the rental data in rent.
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