Interested to Buy Any Domain ? << Click Here >> for more details...
Explain about the Physical Data Model?
- 1 Answers
- 4649 Views
- HCL, I also Faced
- E-Mail Answers
A physical data model (a.k.a. database design) is a
representation of a data design which takes into account the
facilities and constraints of a given database management
system. In the lifecycle of a project it is typically
derived from a logical data model, though it may be
reverse-engineered from a given database implementation. A
complete physical data model will include all the database
artifacts required to create relationships between tables or
achieve performance goals, such as indexes, constraint
definitions, linking tables, partitioned tables or clusters.
The physical data model can usually be used to calculate
storage estimates and may include specific storage
allocation details for a given database system.
The Physical Data Model (PDM) describes how the information
represented in the Logical Data Model is actually
implemented, how the information-exchange requirements are
implemented, and how the data entities and their
relationships are maintained.
There should be a mapping from a given Logical Data Model to
the Physical Data Model if both models are used. The form of
the Physical Data Model can vary greatly. For some purposes,
an additional entity-relationship style diagram will
suffice. The Data Definition Language (DDL) may also be
used. References to message format standards (which identify
message types and options to be used) may suffice for
message-oriented implementations. Descriptions of file
formats may be used when file passing is the mode used to
exchange information. Interoperating systems may use a
variety of techniques to exchange data, and thus have
several distinct partitions in their Physical Data Model
with each partition using a different form.
| Is This Answer Correct ? | 1 Yes | 0 No |
What is entitymanager in java?
Can we extract main method from another class?
Is java installed on windows 10?
What do you understand by casting in java language? What are the types of casting?
How the java is platform independent?
What is a driver in java?
Explain daemon thread.
there are 67 seats in train . there are only 5 seats in a row and in last row there are only 2 seats. One person can reseve only 5 seat at a time. If person reserving seat , the care is atken that he may get all in row. if seats are not available in row then the arrangement is so that person group get nearby seats. the following class is given public class seat { char name; int seat; boolean isSeatempty } 1.Draw require class digram and object diagram. 2.Write function seatallot(int noofperson) to allocate seat with seat nuber printed for the each name.
Is java a framework?
What is transactional in java?
What is the difference between a while statement and a do statement?
For each of the following program segments,give a big zero analysis for the running time 1.For (i=0;i<m;i++) { // } 2.For (j=0;j<i;j++)
0 Answers St. Pauls University,
Java J2EE 
