Explain why 4NF is a normal form more desirable than BCNF.
Answer to relevant QuestionsExplain how dangling tuplesmay arise. Explain problems that theymay cause.Explain how the concept of object identity in the object-oriented model differs from the concept of tuple equality in the relational model.If an object is createdwithout any references to it, howcan that object be deleted?Give an SQL: 1999 schema definition of the E-R diagram in Figure below, which containsspecializations.Write the following queries in XQuery, assuming the DTD from exercise.a. Find the names of all employees who have a child who has a birthday in March.b. Find those employees who took an examination for the skill type ...
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