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Explain Growing Phase of locking
Growing Phase: In this phase the transaction can only obtain locks, but cannot release any lock. The transaction enters the growing phase as soon as it obtains the first lock it wants. From now on it has no option but to keep acquiring all the locks it would require. Ultimately the transaction reaches a point where all the lock it may require has been acquired. This point is known as Lock Point.
Question 1 Explain the concept of database recovery management. Explain the different levels of backup used for recovering data Question 2 What are the different types of par
What does the extract statement do in extract datasets? The data is written to virtual memory by extract commands.
Objectives differentiate DDBMS and conventional DBMS; Describe Network topology for DDBMS; Describe the concepts of horizontal and vertical fragmentation; Descr
a need some real life examples of database management systems three level of ANSI SPARC architecture life teacher and student ,company and employee or for NGO etc.
#floating point representation is used to store
Define instance and schema? Instance: Collection of data kept in the data base at a particular moment is known as an Instance of the database. Schema: The o
explain participation constraints with examples
Explain the Management of Data Store Every system irrespective of its nature of application requires storing permanent data for consequent use in problem solving. Some objects
Define weak and strong entity sets? Weak entity set: entity set that do not have key attribute of their own are known as weak entity sets. Strong entity set
Define cardinality and participation constraints on a relationship type, completeness constraint on generalization. Ans: Cardinality defines the number of entities to wh
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