Start Discovering Solved Questions and Your Course Assignments
TextBooks Included
Active Tutors
Asked Questions
Answered Questions
discuss the various types of inner join operations why is theta join
how are the outer join operations different from the inner join operations how is the outer union operation different
in a tuple relational calculus query with n tuple variables what would be the typical minimum number of join conditions
rewrite the domain relational calculus queries that followed q0 in section 67 in the style of the abbreviated notation
specify and execute the following queries in relational algebra ra using the ra interpreter on the company database
specify and execute the following queries for the database in exercise 316 using the ra interpretera retrieve the names
when we think of relationships as attributes what are the value sets of these attributes what class of data models is
what is meant by a recursive relationship type give some examples of recursive relationship
consider an entity type section in a university database which describes the section offerings of courses the
consider a conferencereview database in which researchers submit their research papers for consideration reviews by
consider a mailorder database in which employees take orders for parts from customers the data requirements are
design an er schema for keeping track of information about votes taken in the us house of representatives during the
in chapters 1 and 2 we discussed the database environment and database users we can consider many entity types to
composite and multivalued attributes can be nested to any number of levels suppose we want to design an attribute for a
given the er schema for the movies database in figure 724 draw an instance diagram using three movies that have been
consider a movie database in which data is recorded about the movie industry the data requirements are summarized as
consider the er diagram in figure 722 assume that an employee may work in up to two departments or may not be assigned
consider the er diagram shown in figure 721 for part of a bank database each bank can have multiple branches and each
draw a uml diagram for storing a played game of chess in a database you may look at httpwwwchessgamescom for an
draw an eer diagram for a game of chess as described in exercise 824 focus on persistent storage aspects of the system
what is the difference between specialization and generalization why do we not display this difference in schema
how does a category differ from a regular shared subclass what is a category used for illustrate your answer with
what aggregation feature is missing from the eer model how can the eer model be further enhanced to support
if co at constant pressure was burned to completion with excess air and the measured temperature of the exit gases was