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Determine object representation
As a designer, we must choose properly that when to use primitive types in representing objects and when to combine groups of related objects, what is exact representation of object attributes.
Define Outer join Outer join - If there are any type of values in the one table that do not have corresponding value(s) in the other, in an equi-join which will not be selected
ER diagram on cosmetics
A relationship set is a set of relationships of the similar type. For example, let consider the relationship among two entities sets course and student. Collection of all the in
In problems 1 - 4, you are given the columns of a table, and a set of functional dependencies. Determine the normal form of this table. Remember that the normal form is the HIGHE
Atomicity: It describes a transaction to be a one unit of processing. We can also say either a transaction will be finished completely or not at all. In the transaction example 1
Order by clause By using this rows can be sorted It is used in the last portion of select statement By default it gets ascending order DESC: is used
In E-R Diagram how relationship type is represented ? In E-R Diagram relationship type is represented as a Diamond.
For the relations R and S given below: R S A B C 1 4 7 2 5 8 3 6 9
let us consider a table having 2200 records and the fixed size of the table to be considered as 25.then how many numbers of table is requredto perform horizontal fragmentation
What subschema expresses ? A subschema expresses the external view. (External schemas are called also called as subschemas)
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