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Describe the candidate key functions ?
Candidate Key and Alternate Key: In some instances, an entity will have more than one attribute which can serve as a primary key. Any key or minimum set of keys which could be a primary key is known as a candidate key. Ones candidate keys are identified, one of them is chosen as primary key. The choice of Primary key is based on guaranteed uniqueness and minimalism. Candidate keys that are not chosen as the primary key are known as alternate keys.
what are the purposes of dbms in details
Draw an Entity-Relationship model for the relational schema given in the Appendix. Show all the entities, relationships, relationship names, and attributes and also underline the
explain normalization,and give the examples 1NF,2NF,3NF,BCNF.AND FUNCTIONAL DEPANDENACY AND DECOMPOSITION TECHNIQUES.
Define the concept of aggregation. Give two examples where this concept is useful. Ans: Aggregation transforms a relationship among the objects into a higher-level object. A
Should I select imaging software that allows changes? An imaging system should not give features to edit or alter images. Images generally are formed as safe and secure records
Security And Integrity After Reading the concepts of database recovery in the last section, let us now deal with a vital concept that helps in minimizing consistency errors in
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Describe relational model? Structure of relational data base Basic structure Database schema Keys Schema diagram Query languages
Why do so various organizations use MySQL? Advantages: Open source Highly efficient Offers a high scalability in terms of size and connectivity. Highly prote
Which sorting technique is used to sort databases, whose sizes are very big? Give one such algorithm. Why do sorting techniques like quicksort, insertion sort, etc. not applied
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