In the sequential file organization, why is an overflow block used even if there is, at the moment, only one overflow record?
Answer to relevant QuestionsList two advantages and two disadvantages of each of the following strategies for storing a relational database:a. Store each relation in one file.b. Store multiple relations (perhaps even the entire database) in one file.If physical OIDs are used, an object can be relocated by keeping a forwarding pointer to its new location. In case an object gets forwarded multiple times, what would be the effect on retrieval speed? Suggest a technique to ...Construct a B+-tree for the following set of key values: (2, 3, 5, 7, 11, 17, 19, 23, 29, 31) Assume that the tree is initially empty and values are added in ascending order. Construct B+-trees for the cases where the number ...Show how the extendable hash structure of Exercise changes as the result of each of the following steps:a. Delete 11.b. Delete 31.c. Insert 1.d. Insert 15.Suppose that we are using extendable hashing on a file that contains ...Consider the following SQL query for our bank database select T.branch-name from branch T, branch S where T.assets > S.assets and S.branch-city = “Brooklyn” Write an efficient relational-algebra expression that is ...
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