DBMS packages-3

Note that with this command will have only specified the structure of the record for a file which is to contain customer data. Therefore we should have some way of loading the customer records in the CUSTLIST file. For this purpose we will have to type the following command:

 

..APPEND

With this command we get a screen which provides a blank customer record. As the name implies, this command will append a record to our CUSTLIST file. Thus, it can be used whenever we want to add one more customer to customer list. With the customer we can add product fulfillment types. Product given to customer gives them product fulfillment or order fulfillment. We can add any criteria for that.

 

In the screen provided with above command, we now type the necessary details of a customer. The names of the fields are displayed on the screen to facilitate entry of data for a customer for which we wish to create a record in CUSTLIST file. After we type in all the required details about the customer and type e get another blank record in which we can enter data about next customer and so on. When we type right at the beginning of blank record we get back to dot prompt where we can issue a new dBASE III command.

HARDWARE-1

With the proliferation of micro-computers, the concept of distributed computing has emerged. In distributed computing, a number of computers are dispersed in different parts of an organization and inter-connected using special cables, telephone lines or other telecommunication media. This allows data and programmers to be shared and also provides for some new types of application such as electronic mail. Electronic Mail moves messages through inter-linked computers/terminals.

 

To support such networking special electronic devices such as modems an network inter-face cards are often fitted into micro-computers. For example, a blinds company who are selling vertical blinds and roman shades online, they are having inter-linked computers by which they are sending their marketing emails. Another example is a company who are providing term life insurance rates online, they are using lead management tools by which their online leads are transfer to their insurance software and from that insurance software they are distributing their leads.

 

As with large computers, micro-computers have operating systems to enable the user to easily interact with the machine. These operating systems are similar to those on large machines except that they are much simpler. This is because the majority of micro-computers are not multi-terminal machines – only one user has access to the machine at any time. In this situation the machine is the personal computer of the user. Personal computers are used for a variety of tasks. The most common applications are:

 

1. Word Processing
2. Financial Analysis
3. Data Base Access
4. Graphics
5. Accounting