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Give a sample of the Dynamic Model.
The sample of dynamic model is given below:
Dynamic model for the car:
Brake and Accelerator Brake or Applies Accelerator
Accelerator Applies an Accelerator
Brake Applies the Brake
off Put off car
on Put on car
press acc is a function
rel accl
press brak
rel brak
It defines that no primary key value can be null. This is as the primary key is used to recognize individual tuple in the relation. So we will not be able to recognize the records
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 the conventions (relationships) for displaying an ER schema as an ER diagram.
Define an operator that a Relational Algebra does not have Ans: Relational Algebra does not have Aggregation operators.
An instance of relational schema R (A, B, C) has distinct values of A including NULL values. then A is a candidate key or not? If relational schema R (A, B, C) has distinct val
Why is database design important?
Deadlock Prevention One of the easiest approaches for avoiding a deadlock would be to obtain all the locks at the begin of the transaction. Though, this approach restricts conc
It can be easily defined as: The database must not have any unmatched foreign key values. The term "unmatched foreign key value" means a foreign key value for which there doe
Hello.I have database access assignment which consist of creation Form, Subform, Calculation, Macros
Increased overheads on update : On the drawbacks side, it will need the system to ensure that all replicas of a relation are consistent. This shows that all the replicas of the rel
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