Show, by giving a DTD, how to represent the books nested-relation from Section 9.1, using XML
Answer to relevant QuestionsGive the DTD for an XML representation of the following nested-relational schema Emp = (ename, ChildrenSet setof (Children), SkillsSet setof (Skills))Children = (name, Birthday)Birthday = (day, month, year)Skills = (type, ...Give a query in XQuery to flip the nesting of data as shown below. That is, at the outermost level of nesting the outputmust have elements corresponding to authors, and each such element must have nested within it items ...How does the remapping of bad sectors by disk controllers affect data-retrieval rates?Give an example of a database application in which the pointer method of representing variable-length records is preferable to the reserved-space method. Explain your answer.Consider the following bitmap technique for tracking free space in a file. For each block in the file, two bits are maintained in the bitmap. If the block is between 0 and 30 percent full the bits are 00, between 30 and 60 ...
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