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Differentiate between a subquery and a join
If we need to acquire information from one or more tables after that either subquery or join can be used. If the columns which are to appear in the result table are from different tables after that a join must be employed.
Strong entity set and weak entity set? Strong entity set and weak entity set: A strong entity set has a primary key. All tuples in the set are distinguishable through that key.
In E-R Diagram how relationship type is represented ? In E-R Diagram relationship type is represented as a Diamond.
Types of data independence Data independence can be classified into the following two types: Physical Data Independence: This means that for any change made in the physi
Can a filed occur in several field groups. Yes. But it leads to redundant data redundancy.
What is serialization? Where it is used and why? Serialization is a basic term used for mechanisms which enable objects and object structures to be converted into portable for
Define a job scheduling strategy that will meet business requirement of reporting availability by 6am CST for the following cubes? Show the job scheduling dependencies in a pictori
With the help of a suitable diagram gives module wise explanation of system architecture of DBMS.on..
Explain the Project-Join normal form A relation R is in PJNF along with respect to a set of functional dependencies D if for all join dependencies of the outline *(R 1 , R 2 ,
Aggregation : One limitation of the E-R diagram is that they do not permit representation of relationships between relationships. In such a case the relationship along with its ent
Regional Gardens has many nurseries, including Wagga Wagga, Bathurst, Albury, Orange, and Dubbo. Each nursery is known by its campus code, eg WW, B, A, O and D respectively. Additi
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