Q: In the sequential file organization, why is an overflow block used
In the sequential file organization, why is an overflow block used even if there is, at the moment, only one overflow record?
See AnswerQ: Give a normalized version of the Index metadata relation, and explain
Give a normalized version of the Index metadata relation, and explain why using the normalized version would result in worse performance.
See AnswerQ: Standard buffer managers assume each block is of the same size and
Standard buffer managers assume each block is of the same size and costs the same to read. Consider a buffer manager that, instead of LRU, uses the rate of reference to objects, that is, how often an ob...
See AnswerQ: When is it preferable to use a dense index rather than a
When is it preferable to use a dense index rather than a sparse index? Explain your answer.
See AnswerQ: Spatial indices that can index spatial intervals can conceptually be used to
Spatial indices that can index spatial intervals can conceptually be used to index temporal data by treating valid time as a time interval. What is the problem with doing so, and how is the problem so...
See AnswerQ: Some attributes of relations may contain sensitive data, and may be
Some attributes of relations may contain sensitive data, and may be required to be stored in an encrypted fashion. How does data encryption affect index schemes? In particular, how might it affect schem...
See AnswerQ: What is the difference between a clustering index and a secondary index
What is the difference between a clustering index and a secondary index?
See AnswerQ: For each B+-tree of Exercise 14.3, show
For each B+-tree of Exercise 14.3, show the steps involved in the following queries: a. Find records with a search-key value of 11. b. Find records with a search-key value between 7 and 17, inclusive....
See AnswerQ: Consider the bank database of Figure 2.18. Give an
Consider the bank database of Figure 2.18. Give an expression in the relational algebra for each of the following queries: a. Find each loan number with a loan amount greater than $10000. b. Find the...
See AnswerQ: The solution presented in Section 14.3.5 to deal
The solution presented in Section 14.3.5 to deal with non-unique search keys added an extra attribute to the search key. What effect could this change have on the height of the B+-tree?
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