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Define object-relational systems?
Systems that give object-oriented extensions to relational systems are known as object-relational systems.
What is a function group? A function group is a collection of logically related modules that share global data with every other. All the modules in the group are contained in
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
Write a short note on built in function in QBE? Built in function in QBE: QBE involves various built in functions like AVG, MAX,MIN,SUM and CNT. We must prefix these operator
This project will involve designing and creating a database for an organization. In the design of a database, there is no single "perfect" design. So your database design may not
please describe the data base management with the easy example &give the application?
How can we Classify the operations on classes This step fundamentally means all three models functional, object and dynamic (studied in last section) must be combined so that
Synonyms It allows short names or alternative names for objects. Example : CREATE SYNONYM D30 FOR EMPD30; Now if we give command:
Describe Database state in details? Database state: The actual data within the database at a particular moment in time is known as a database state.
What is Primary key? Primary Key - Primary key is one of the candidate keys which uniquely identifies each row in the relation.
Rules Of Data Normalisation Let us now summarise Normalisation with the help of various clean rules. The following are the necessary rules for the Normalisation process: 1.
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