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Which database level is closest to the users?
External database level is closest to the users.
Question: (a) List four disadvantages of the File Processing System as compared to the Database Systems. (b) The integrity of a database is enforced by integrity rules. One
What are the two types of indices? The two types of indices are:- A) Dense index B) Sparse index
Example: Consider the following relations: ROLLNO NAME ADDRESS COURSE_ID 100 Ka
Explain I command in QBE ? I : It is the command in QBE that is used to insert tuple (s) into the database
The Maximum no of key fields that can be used in a header is?? 50
What is foreign key? Foreign Key - Let there are two relations in tables R and S. Any candidate key of the relation R that is referred in the relation S is known as the forei
Differentiate between various levels of data abstraction? Data Abstraction - Abstraction is the procedure to hide the irrelevant things from the users and represent the rele
The JOIN operation is applied on two relations. When we want to choose related tuples from two given relation join is used. The join operation need that both the joined relations m
The First Normal Form (1NF) Let us first describe 1NF: Definition: A relation (table) is in 1NF if 1. There are no duplicate tuples or rows in the relation. 2.
Whst is logical schema ? Logical schema is the entire database.
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