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Suppose that we have a ternary relationship R between entity sets A, B, and C such that A has a key constraint and total participation and B has a key constraint; these are the only constraints. A has attributes a1 and a2, with a1 being the key; B and C are similar. R has no descriptive attributes. Write SQL statements that create tables corresponding to this information so as to capture as many of the constraints as possible. If you cannot capture some constraint, explain why.
What is the most common database query language? What is the name for a column that uniquely identifies a record
Using an explicit cursor, retrieve each row from the i_car table. Create a local variable that inherits the structure of the i_car table (using %ROWTYPE attribute). Place each row returned into this variable
Compute a canonical cover for the above set of functional dependencies (show each step of your derivation with an explanation).
describe the challenges that an organization will face when changing business processes and how information systems
Construct an er diagram for a hospital with a set of patients and a set of medical doctors. associate with each patient a log of various test and examination conducted.convert er diagram into tables
Write a two-page executive summary for your boss explaining how a relational data solution can be applied to a current business problem or area for improvement. Assume that your boss knows nothing about relational database theory.
Prepare an ER diagram for the database described below(using crows foot notation). Be sure to identify all required entities, attributes, and relationships (including cardinalities). State any assumptions you make, and indicate a primary key for e..
There is a growing requirement to meet or exceed expectations of end users and applications communicating over a packet-switched network. In order to fulfil this requirement, different techniques are used to improve the QoS.
Compute the predetermined overhead rate under the current method, and determine the unit product cost of each product for the current year.
Develop and demonstrate SQL skills
Express the information about Fred and Ann in unary facts. Draw a conceptual schema diagram based on this choice
Context Diagram and Diagram 0 DFD/ Structured Analysis, Please also discuss the importance of structured analysis
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