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How external/conceptual mapping and conceptual /internal mapping is performed
Fourth Normal Form (4NF) When attributes in a relation have multi-valued dependency, further Normalization to 4NF and 5NF are needed. Let us first find out what multi-valued d
WHY SHOULD NULL IN A RELATION BE AVOID AS possible?
Describe entity referential integrity and integrity. Give an example of each. Entity Integrity Rule - If there is a attribute A of relation R is a prime attribute of R then A
tell me the functionality,advantages and disadvantages of student database
Write a short note on QBE? Stands for "Query By Example." QBE is a feature involved along with various database applications which gives user-friendly techniques of running da
Implementing software control To implement software control designer must redesign strategy of state event model which is present in dynamic model. There are three basic ap
Consider an information system designed for an online company which provides IT products and services. These include desktops, laptops, networking products, IT books, parts, and te
Attributes and its types explain?
Explain the difference between using functions along with and without grouping attributes in relational algebra. Give examples. Ans: Group functions are used to group data of
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