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What are the disadvantages of relational data ? Disadvantages • Performance - If the number of tables among that relationships to be established are large and the tables t
What is schema
Preliminary entities and attributes of human resourse management database management system
QUESTION (a) Consider a car database consisting of car model, car make, car origin, Engine capacity, color, cost.
Define the Division Operation of Relational Algebra Let R be a relation comprising attributes (A1,...Ap,Ap+1,...An) and S comprising attributes (Ap+1,...An) DEF: Division
Lock Based Protocol A lock is nothing but a mechanism that tells the DBMS whether a particular data item is being used by any transaction for read/write purpose. As there are t
What is a relationship called when it is maintained between two entities? A relationship is called Binary relationship when it is maintained between two entities.
Example: Consider the following relations: ROLLNO NAME ADDRESS COURSE_ID 100 Ka
Domain Constraint It shows that each attribute in a relation has to contain an atomic value only from the corresponding domains. The data types associated with commercial RDBMS
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
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