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List the drawbacks of relational database system
A) Repetition of data
B) Inability to s certain information.
education.
What is association? Give an example of association Association is used for establishing relationships among classes. Association describe links among/between classes. For exa
The users who use easy-to-use menu are called ? The users who use easy to use menu are called as Naïve users.
What are the Objectives of object design After going through this unit, you could be able to: explain steps of object design; discuss algorithms that reduce costs;
What do you mean by atomicity and aggregation? Atomicity : Either all actions are carried out or none are. Users should not have to worry about the effect of incomplete trans
What is a data dictionary? A data dictionary is a data structure which keeps Meta data about the structure of the database i.e. the schema of the database.
Explain entity integrity and referential integrity rules within relational model. Show how these are realized in SQL? Entity Integrity Rule - No primary key value could be nu
Attributes that are directly kept in the data base. For example, 'Birth date' attribute of a person. Derived Attributes that are not stored directly but can be derived
Give two profit of Reuse of Code. Reusing the implementation . Place existing class directly inside a new class. The new class can be made up of any number and type of the oth
how many types of data model in DBMS? explain data abstraction with its different level
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