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A super key is an attribute or set of attributes used to recognize the records uniquely in a relation.
For instance, in the Relation PERSON defines earlier PERSON_ID is a super key since PERSON_ID is unique for every person. Likewise (PERSON_ID, AGE) and (PERSON_ID, NAME) are also super keys of the relation PERSON as their combination is also unique for each record.
Database Administrator One of the main perpose for having the database management system is to have control of both data or programs accessing that data. The person having li
Consider a systems development project with the following data Activity Duration (weeks) Precedence Relationship 1. Software design
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
1.Why we need data mining? Give an example to illustrate your answer. 2. Why data mining is considered as "misleading name"? 3. Distinguish the difference between database an
complete assignment on the above title.
entity relationship diagram about finance
What do you mean through integrity constraints? Integrity Constraints -An integrity constraint is a condition specified on a database schema and restricts the data in which
let us consider a table having 2200 records and the fixed size of the table to be considered as 25.then how many numbers of table is requredto perform horizontal fragmentation
How many levels can be viewed in Architecture of the database ? Architecture of the database can be viewed as three levels.
Define Fifth Normal form is concerned with Ans : Fifth Normal form is concerned with Join dependency.
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