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Define NULL value
NULL value NULL means something is unknown. It does NOT mean null (the digit 0). Null is as well employed as attribute value for a particular entity in which attribute is not applicable for example name of child for unmarried.
I have a small project that contains 3 deliverable s. I have done the first one and I would like you to help me with second one
Introductory course and so does not require any fancy coding. I will provide a guidance document to help you in producing the solutions.
If one requires to access data using Logical Database , the use of events is unavoidable. Yes, if someone wants to access data using Logical database then the use of events
explain participation constraints with examples
What is E-R model? This data model is based on real world that having of basic objects called entities and of relationship between these objects. Entities are explained in a da
Define functional and multivalued dependencies. Ans: A functional dependency is a assets of the semantics of the attributes in a relation. The semantics point out how at
Problem 1 Why are the operational system keys not recommended for forming data warehouse primary keys? Give any two examples 2 Explain the following performance tuning techn
Develop a database broker framework to implement a persistence mechanism for the domain objects involved in the use case dealt with in Question 2. a. Specify the attribute type
For the relations R and S given below: R S A B C 1 4 7 2 5 8 3 6 9
Define object-relational systems? Systems that give object-oriented extensions to relational systems are known as object-relational systems.
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