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What is key ? Key - A single attribute or a combination of two or more attributes of an entity set which is used to recognize one or more instances (rows) of the set (table) is
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
why three level architecture had been developed/
What are the two types of serializability? The two types of serializability is a) Conflict serializability b) View serializability
what is 3nf
What are temporary tables? Temporary tables exist solely for a particular session or whose data persists for the duration of the transaction.
1. Determine the set of minimal functional dependencies for the following data. The local bakery, Happy Cakes, needs your help designing a database that will support a kiosk in
Define instance and schema? Instance: Collection of data stored in the data base at a certain moment is Schema: The overall design of the data base is known as the data base
Answer SQL Queries to extract data from data tables and questions on mapping conceptual data models into relational data model.
Economics: It is now usually accepted that it costs less to make a system of smaller computers with the equivalent power of a one large computer. It is more cost-effective to get s
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