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Differentiate between a subquery and a join
If we need to acquire information from one or more tables after that either subquery or join can be used. If the columns which are to appear in the result table are from different tables after that a join must be employed.
construct a B+ tree for the following set of key value (2,3,5,7,11,19,23,29,31) in ascending order where the pointers that will fit in one node is as follows:A. four B. six C. eigh
What are the reasons for having variable length records? What are the various ways to store variable length records? Variable-length records arise in a database in various wa
Objectives After Reading this part, you should be able to: Explain the term CONCURRENCY; Describe the term transaction and concurrent transactions; Talk about co
Give the Introduction of OBJECT DESIGN Strategies which are selected during system design are carried out in object-oriented design. In this procedure, objects which are identi
What is a candidate key? Minimal super keys are known as candidate keys.
Define lock? Lock is the most common used to execute the requirement is to permit a transaction to access a data item only if it is currently holding a lock on that item.
What are composite attributes? Composite attributes can be separated in to sub parts.
Process-oriented decompositions Process-oriented decompositions divide complex process, task or function into simpler sub processes until they get simple enough to be deal
Describe the various types of Online Analytical Processing (OLAP) tools and briefly discuss how the support common analytical operations.
Differentiate between logical database design and physical database design. Show how this separation leads to data independence? Basis Logical Databas
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