J. K. Does this relation contain a transitive dependency? If so, what is it? Redesign the relation to eliminate modification anomalies.
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- Make a version of the hybrid merge-join method that works when both relations are not physically sorted but have a sorted secondary index on the traits to be combined.If there are more than one possible candidate keys, provide some instances of relations that have more than one.can you do with different operations names and attribute names and relations too?
- Consider the department relation's foreign-key restriction from the instructor's dept name property. Give instances of inserts and deletes that might violate the foreign-key limitation.2. For the following questions, please identify the candidate keys of the given relations. You need to show the process to justify your answers. a) The given relation is R1(ABCDE). The given dependencies are A B B-E C-D b) The given relation is R2(ABCDE). The given dependencies are AB→BCDE BC ACE D-EConsider a relation named as BOOK that contains data about the books in a library. BOOK relation was initially created with the attributes BookID (an id that library assigns), ISBN, CopyNr (used to differentiate copies of the same book), Title, PublYear, Author, and AuthorBornYear. Primary key: BookID, CopyNr and Author Candidate key: ISBN, CopyNr and Author Below you see dependencies of attributes: Dependency 1 (D1): ISBN, Title, PublYear, AuthorBornYear were dependent on BookID, CopyNr and Author Dependency 2 (D2): Title and PublYear were dependent on BookID, CopyNr Dependency 3 (D3): AuthorBornYear was dependent on Author First determine which normal form (1NF, 2NF, 3NF or BCNF) the above relation is, and why. Then, if necessary, convert the above relation to the highest normal form (BCNF). Write any assumptions that you make.
- A candidate key exists for an attribute of a composite main key. What are your thoughts on this information?Suppose the functional dependency StudentIDàStudentName is correct. If we know the StudentName value for a given student, can we know the only StudentID value which the given student has? If not, give an example to justify your answer.