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Question 1 Explain ER model
Question 2 What are the characteristics of a computer provided information?
Question 3 What are facts and guidelines to be considered when selecting a character set?
Question 4 Explain
Question 5 Write an SQL query to create the student table with the necessary columns and check whether that column allows null values.
Question 6 Create a student table with the following attributes Student name, student roll no, 5 different subjects. Write SQL query for the following conditions
Difference between Operating System and Database Security Security within the operating system can be executed at various levels ranging from passwords for access to system, t
E-R Model This data model is based on real world that consists of basic objects named entities and of relationship among these objects. Entities are illustrated in a database
What is trigger? Triggers are statements that are executed automatically by the system as the side effect of a modification to the database.
Give detail description on Transactions. - Using transactions we can group all SQL commands into a single unit. - Transaction begins with some task and finishes only when a
Question: Consider the following database relations for a textbook ordering system used by a college bookshop: Book (b-copy#, bname, ISBN#, author, price, subject) Order (s#
what is natural join?
Compute the closure (F+) for the following set of the functional dependencies defined on R(a,b,c,d), where F - {c→ a, ab → d, a → b, d → c}, i.e. what are all of the FDs implied b
For the relations R and S given below: R S A B C 1 4 7 2 5 8 3 6 9
Which component is not included in database environment ? A users component is not included in database environment.
In E-R diagram how generalization is represented? in E-R diagram generalization is represented by Triangle shape.
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