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determine whether the statement is true or false if it is true explain why it is true if it is false give an example to
oil spills the oil spilling from the ruptured hull of a grounded tanker spreads in all directions in calm waters
profit of a vineyard phillip the proprietor of a vineyard estimates that if 10000 bottles of wine were produced this
charter revenue the owner of a luxury motor yacht that sails among the 4000 greek islands charges 600person day if
yield of an apple orchard an apple orchard has an average yield of 36 bushels of applestree if tree density is 22
book design a book designer has decided that the pages of a book should have 1-in margins at the top and bottom and in
consider again the relational schema from exercise 519 write a jdbc function using non-recursive sql to find the total
the natural outer-join operations extend the natural-join operation so that tuples from the participating relations are
consider the relational database of figure 622 where the primary keys are underlined give an expression in tuple
consider the relational database of figure 622 give a relational-algebra expression for each of the following queriesa
consider the following relational schema for a librarywrite the following queries in relational algebraa find the names
using the university example write relational-algebra queries to find the course sections taught by more than one
design a database for an automobile company to provide to its dealers to assist them in maintaining customer records
design a database for a world-wide package delivery company eg dhl or fedex the database must be able to keep track of
write the following queries in relational algebra using the university schemaa find the titles of courses in the comp
explain the distinction between condition-defined and user-defined constraints which of these constraints can the
design a generalization-specialization hierarchy for a motor vehicle sales company the company sells motorcycles
consider the e-r diagram in figure 729 which models an online bookstorea list the entity sets and their primary keysb
we can convert any weak entity set to a strong entity set by simply adding appropriate attributes why then do we have
temporal changes an e-r diagram usually models the state of an enterprise at a point in time suppose we wish to track
let a prime attribute be one that appears in at least one candidate key let and be sets of attributes such that
a functional dependency alphararrbeta is called a partial dependency if there is a proper subset gamma of such that
consider the following set f of functional dependencies on the relation schema r a b c d e fa compute bb prove using
design an e-r diagram for keeping track of the exploits of your favorite sports team you should store the matches