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write program code to access individual fields of records under each of the following circumstances for each case state
suppose that we have an unordered file of fixed-length records that uses an unspanned record organization outline
suppose that a file initially contains r 120000 records of r 200 bytes each in an unsorted heap file the block size b
suppose we have a sequential ordered file of 100000 records where each record is 240 bytes assume that b 2400 bytes s
suppose that several secondary indexes exist on non-key fields of a file implemented using option 3 of section 1813 for
what are the differences among primary secondary and clustering indexes how do these differences affect the ways in
what is the order p of a b-tree describe the structure of both internal and leaf nodes of a
how does a b-tree differ from a b-tree why is a b-tree usually preferred as an access structure to a data
what is bitmap indexing create a relation with two columns and sixteen tuples and show an example of a bitmap index on
what is the concept of function-based indexing what additional purpose does it
algorithm 181 outlines the procedure for searching a non-dense multilevel primary index to retrieve a file record adapt
suppose that the following search field values are deleted in the given order from the b-tree of exercise 1819 show how
consider a disk with block size b 512 bytes a block pointer is p 6 bytes long and a record pointer is pr 7 bytes
discuss the different algorithms for implementing each of the following relational operators and the circumstances
what is meant by semantic query optimization how does it differ from other query optimization
how does a query tree represent a relational algebra expression what is meant by an execution of a query tree discuss
what is meant by the term heuristic optimization discuss the main heuristics that are applied during query
discuss the different types of parameters that are used in cost functions where is this information
discuss the cost components for a cost function that is used to estimate query execution cost which cost components are
a parts file with part as the key field includes records with the following part values 23 65 37 60 46 92 48 71 56 59
repeat exercise 1821 but for the b-tree of exercise 1820repeat exercise 1821suppose that the following search field
what is the difference between the constrained write and the unconstrained write assumptions which is more
discuss how serializability is used to enforce concurrency control in a database system why is serializability
under what situations would denormalization of a database schema be used give examples of
consider sql queries q1 q8 q1b and q4 in chapter 4 and q27 in chapter 5a draw at least two query trees that can