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Question: One of the tasks a database management system must perform is to ensure that the data is still intact in the face of software and hardware failure. This task is known
Briefly describe concurrency execution? Lock - based protocols Locks There are several modes in which a data item may be locked in this section we restrict our attention
Benefits and limitations
explain three types of internet risks to the consummers whent he business system is data dependent. how can we minimise these risks
Benefits: It limits data access. It makes difficult queries look easy. It permits data independence. It presents dissimilar views of the similar data.
A model in database system mostly defines the organisation of data or structure and a set of operations on that data. Relational model is a easy model in which database is represen
give me a diagram about physical or internal level
Synonyms and Indexes Some of the essential properties of indexes are: An Index is a schema Object Indexes can be formed explicitly or automatically Indexes are m
external view of DBMS in healthcare department?
When It is better to use files than a DBMS? It is better to use files than a DBMS when Multiple users wish to access the data.
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