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Question 1 Explain the concept of Foreign Key. How a foreign key differs from a Primary Key? Can the Foreign Key accept nulls?
Question 2 With a necessary example explain (i) Basic Constructs of E-R Modeling (ii) E-R Notations
Question 3 Explain the first 3 Normal Forms taking the help of an un-normalized relation and reducing it to 3 NF
Question 4 Explain the concept of Data Mining? How it is related with data warehouse
Question 5 Write the SQL queries using Data Manipulation Language (DML) statements
Question 6 Create the payroll database considering table employee
Write short notes on transaction state? A transaction may not always complete its implementation successfully such a transaction is termed aborted A transaction must be in o
Define database management system? Database management system (DBMS) is a set of interrelated data and a combination of programs to access those data.
Define Database layer? The database layer defines the data formats used in the database.
What is D command work in the respect of QBE? D: It is the command inside QBE to delete tuple(s) from the relation.
Failure Controlling Methods: Failures can be handled using different recovery methods that are talk about later in the unit. But the first question is doing we really require recov
Explain Strict Two-Phase locking A transaction T does not release any type of its exclusive (X) locks until that transaction commits or aborts. In this method no other transact
how to write tables and drow E-R diagrams for hosiptal management system and how to normalize and cardinalities?
Explain the Project-Join normal form A relation R is in PJNF along with respect to a set of functional dependencies D if for all join dependencies of the outline *(R 1 , R 2 ,
Project: Microsoft Access You have been asked by the ABC Tanning Salon to create a database that can be used to track the salon's customers. You are to create a table in Access
Consider a research paper submission process. The process starts when an author submits a draft research paper (the paper may have up to 3 authors) to the chair of the organizing c
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