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what is the need of a log in dbms
Lost Updates : Suppose the two transactions T3 and T4 run simultaneously and they happen to be interleaved in the following way (suppose the initial value of X as 10000):
What is nested relational model? The nested relational model is an extension of relational model in which domains might be either atomic or relation valued.
Define the Boyce-Codd Normal Form with instance and also Compare BCNF and 3NF. Ans: BCNF: For each functional dependency X->Y in a set F of functional dependencies over relati
Q. With the help of a suitable diagram gives module wise explanation of system architecture of DBMS. Sol. A Database management is a collection of interrelated data and col
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
System Design: An Object Oriented Approach Any software systems always try to change and evolve as technology and business rules evolve. The development of information systems
how to write tables and drow E-R diagrams for hosiptal management system and how to normalize and cardinalities?
Define blocks? The database system resides eternally on non-volatile storage, and is into fixed-length storage units known as blocks.
What are audit trails? An audit trail is a log of all alters to the database along with information like which user performed the change and when the alter was performed.
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