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Describe sequential file organization. Explain the rules for (i) Inserting a new record. (ii) Deleting an existing record. Ans:A sequential f
Explain Superkey Ans: A superkey is described in the relational model of database organization like a set of attributes of a relation variable for which it holds that in all re
Why did SAP introduce the extended star schema? Explain why it is reported to be better than the traditional schema model?
Preliminary entities and attributes of human resourse management database management system
The need for three level architecture The aim of the three level architecture is to divide each user's view of the database from the way the database is physically shown.
What is Hierarchical DBMS In HDBMS, data is structured in a tree like manner. There is a parent-child relationship between data items and the data model is very suitable for re
The advantages of a database management system (DBMS) include :- Data integrity and elimination of duplication.
how draw er diagram
Primary index A primary index is a file that has a sorted series of records having two columns: a block address for that key field in the data file; and the ordering key field.
why are older data models are being replaced by new data models
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