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In case of entity integrity, the primary key may be declared? In a case of entity integrity primary key may be not Null.
Explain the Functional Mode with help of an example. Functional Model The functional model shows a computation and functional derivation of data values in it without ind
How Relational Calculus is different from Relational Algebra? What do understand by TRC queries and DRC queries? Ans: Relational calculus contain two calculi, the tuple relati
case study
Draw the precedence graph of the following schedule and determine whether the schedule is serializable. (Note that all instructions, except lock and unlock, are omitted. We assume
explain in detail about time stamp orderting/
What is a function group? A function group is a collection of logically related modules that share global data with every other. All the modules in the group are contained in
Database systems have many opposite efforts ?
how to write tables and drow E-R diagrams for hosiptal management system and how to normalize and cardinalities?
Describe file organisation? A file is organized logically as a sequence of records. These records are mapped onto disk blocks. A) Fixed-Length Records Type deposit=record
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