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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
cosc11051107 - computing theory assignment exercise 1 turing
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
construct an e-r diagram for a car insurance company whose customers own one or more cars each each car has associated
in sql foreign key constraints can only reference the primary key attributes of the referenced relation or other
consider the representation of a ternary relationship using binary relationships as described in section 773 and
consider a many-to-one relationship r between entity sets a and b suppose the relation created from r is combined with
show that the following decomposition of the schema r of practice exercise 81 is not a lossless decompositiona b cc d
consider an e-r diagram in which the same entity set appears several times with its attributes repeated in more than
consider a database used to record the marks that students get in different exams of different course offerings
given the three goals of relational database design is there any reason to design a database schema that is in 2nf but