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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 schema.
List the string operations supported by SQL? 1) Pattern matching Operation 2) Concatenation 3) Extracting character strings 4) Converting among uppercase and lower cas
Advantages of Database management system Let us summarize the advantages. Reduction of Redundancy: This is perhaps the most important advantage of using DBMS. Redundancy i
Why is need for the multiple access paths?
What is meant by heuristic optimisation?Discuss the major heuristics that are applied during query optimisation.
Explain briefly concurrent task by taking an example. Concurrent Task- The concurrent occurrence of more than one event is called concurrent task. Operating systems can handl
can you please explain with the help of suitable example the difference between conflict equivalence and conflict serializability?
In this practical assignment, we will run through a complete database application development cycle, starting with the schema design, from an initial data import to database applic
Failures and Recovery In practice various things might occur to prevent a transaction from completing. Recovery methods are used to bring database, which does not satisfy consi
In case of entity integrity, the primary key may be declared? In a case of entity integrity primary key may be not Null.
project on dbms
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