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What is horizontal fragmentation?
Horizontal fragmentation divides the relation by assuming every tuple of r to one or more fragments
First Normal Form and second normal form First Normal Form (1NF) A relation is said to be in 1NF if it having no non-atomic values and each row can give a unique combinat
Consider the following relations: S (S#, SNAME, STATUS, CITY) SP (S#, P#, QTY) P (P#, PNAME, COLOR, WEIGHT, CITY) Give an expression within SQL for each of queries b
Whst is logical schema ? Logical schema is the entire database.
what is the relationship between receipt and owner entities in computer sales and service company
Normal 0 false false false EN-US X-NONE X-NONE
Explain data abstraction? Data abstraction Data abstraction is a methodology in which enables us to isolate how a compound data object is utilized from the details of how it is
Explain controlled redundancy? Controlled redundancy : The replication of data within the data warehouse for the purposes of improved data access or understand ability.
Define Fifth Normal form is concerned with Ans : Fifth Normal form is concerned with Join dependency.
Write short notes on extension and intension? In any data model, it is significant to distinguish among the description of the database and the database itself the description
explain the level architectures of the database management system
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