Introduction of data cables Data cable is an important part of computer network model . From smartphone to supercomputer connections and wide range network uses and network models. It helps in network model in different types of topology models also. But we discuss what exactly called a data cable? How it is working with network model? Why these data cables are so important? In this guide, I will provide some information about the definitions, types, uses of data cables on network model with easy explanation of data cable covered topics. What is data cable? [Definition] A data cable is a wire that can transfer the data from one to another computer system. It connects to the ports available on the computer system. The user can transfer the data from one computer to another data cable connection. If two computers are connected then:- In according to data cable male port:- Port 1:- the male port of data cable is used to receive the data from the sender computer. Port 2:- th...
What are the steps of attribute of software model designing?
First of all we considered the software model as
according to the database then we consider the steps of attribute of the
software model.
What is the software model in according to the database?
Software model is to understand by the skeleton structures of
the software called schema. The Schema is define basically the two main
structures are logical structure and Physical structure. Schema is define that
the relation of their entity, attribute, processing structure, function,
logical structure and Physical structure.
1. A typical model of software has their entity, attribute,
conditions, functions, connection of the database etc.
2. A software has Input and output structure and their
interface design.
3. A software has their database structure or database
connectivity.
4. The Admin and the End user interfaces design of the
software model have its security access to protect the data or any RDBMS
information.
5. The security of the software protects their company data.
6. Accessing of networking must need for the software.
7. A Module is to design for the software to solve basically
the original problem of the specific tasks.
8. Here the database of the software is managed by the Key
attributes which is given below the typical steps.
Steps of attribute in typical model of software
1. Step 1
Use Primary Key
First you can use the primary key to identify uniquely the
database which is in the form of table.
Suppose you can use to see the record of LHS (Left Hand Side)
table and RHS (Right Hand Side) table by using the basic condition.
For example:
SELECT id no.,
Employee_name, Address;
From * Table; \\ both side of the table
Where ( id = 1);
This condition is use to retrieve the data from both the
table and the result is
( 1, abhishek Avasthi , Uttarakhand, India)
Here is code from MS SQL server 2008. It is used as database
for software developing.
Here in the figure above Id no., employee name, address fields
are the three column and their records which is represents in the rows of
table. Column is to understand the attribute of the recorded data.
In the table Id number is must be needed for the every data
base of the tabular form because the sequential data is very easily to retrieve
the data from the table’s record.
2. Step 2
Use Candidate key
If you have problem in tabular database such as all employees are admins and their admin_id number than you can use candidate key because admins numbers may be are look like Id number of their employees.
By using the ‘select’ command as given above in the step 1.
3. Step 3
Use Super key
If you have a problem in the tabular data in the employees
name and their address field’s values are the same as a part of the primary key
then you can use Super key.
In the above Figure to show the Super key detects their
Employees name and addresses are same or not.
4. Step 4
In another way you can use Composite Key
In other way when Primary key is not identify uniquely the
database in the table record then you can add new field or column or attribute
of the record to identify uniquely by the use of Composite Key.
In the above figure Composite Key attribute to composite or
merge two databases and new database created which is used to help the uniquely
identify the record of the database from the new created table.
5. Step 5
For instant data you can use Secondary Key
a) Secondary key is use to classifies the data in table
database.
b) It classifies the instances of employee entity set such as
their department name which is the attribute of employees in a field or column.
Secondary key is use to identify by the department in the
above table. Secondary is used as the strong attribute which is show in the
figure above.
6. Step 6
Use Foreign Key
a) Foreign Key is use widely because according to employees
departments in any company employees record the most of employees have their
one department but some employees have their two departments with different
works.
b) In the above figure “Foreign Key” may be the primary key from another department because their data have corresponds to.
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MCQ questions related to the steps of software attributes....
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Which basic key attributes are used to find the record from the relational database model in the application software?
- A) Foreign key
- B) Composite key
- C) Super key
- D) Primary key
Answer is D) "Primary key"
The primary key basically used first to uniquely identify the record and most powerful key in the relational database model.
The find record using the select command is used to find the record from the database file.
When the user applies the select command in the relational database model then the user needs to mention the "user id number" which is known as the primary key mentioned in the relational database model. For example:- "Select user_id_num = 089;" .
Then the select command works on the database file and provides the record which has the user id number is 089.
Can a primary key be a unique identifier in database records?
Yes, the primary key or attribute used to define the record in the database file is unique from every record stored in the database file.
The relational database model file stores so many types of records and their attributes that categorised the data based on object or subject stores in a text information in the table format or matrix format.
The table included row as a record and column as an attribute to store the property of the record such as:- a user has a name which is categorised by the first, middle and last name on the table format of database file which is also known as relational database model.
For example:- Ana de Rodrigues included the first name Ana then middle name is De and last name is Rodrigues stored in three columns in one record or row in the table format of database file or relational database model file.
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