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What is recursive closure? Why is it not possible to describe this operation in relational algebra? Recursive closure is applied to recursive relationship. An instance of rec
What are the typical phases of query processing
What are the four main characteristics of the database approach? The four major characteristics of the database approach are: 1. Self-describing nature of a database system. 2.
Explain what is RDBMS ? RDBMS - RDBMS is a database management system (DBMS) which stores data within the form of relations. Relational databases are powerful since they need f
how to find entities
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differences between a classified catalog and a dictionary catalog
Explain Alternate key? Alternate Key - All the candidate keys except primary key are known as alternate keys.
Although, the essential features of E-R diagrams are enough to design many database situations. Though, with more difficult relations and advanced database applications, it is need
Differentiate between logical database design and physical database design. Show how this separation leads to data independence? Basis Logical Databas
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