#Computer database management system pdf manual#

Consider an example of accounts department of an organization. To find a person having a name starting with ‘H’ you will have to search it in two different places, which is quite cumbersome procedure.Ģ. The first option is obviously very tiring and time consuming and thinks of the second option. The second option is to use some blanks pages at the end of address book for storing remaining address of the persons whose names starts with “H”. What will you do when the page allotted for names beginning with “H” is finished? One option is to buy a new O1J.eof larger size and to transfer the previous ones onto the new one, start with the next address to be stored. Consider an example of address dictionary.

#Computer database management system pdf manual#

Let us take the most simple and basic examples to explain the problems with manual databases.ġ. Manual database is the record keeping systems in which human being manage the whole database without the support of computers.

Sort Operation: Arranging the information in a desired ascending or descending order etc.

For example, you have to find the address of one of your old friend “Ajay”. Retrieval Operation: To view or retrieve the stored information. So his mobile number would have to be removed from list. For example, your friend has purchased a new mobile connection and uses it for some time. To removes or deletes the unwanted information. Think of your own address directory where you keep the addresses and phone numbers of your near and dear ones and it is also a database.Ĭonsider a university management system having student data and teacher data can be maintained in the database by organizing the records of student in Student data file and records of teachers in Teacher data file as shown.ĭeletion. Similarly everybody can make a database of his/her own to keep the information in an organized manner. If this ordering would not have done, how could you find one word out of say 10,000 words. So that it becomes easier to search any word whose meaning is required. In dictionary, the words are arranged in alphabetic order along with their meanings. In each of these the data is stored in some particular order i.e. There are so many examples of organized information, more precisely and the most common are, the dictionary, the telephone directory, student record register, your own address book and many more. The organization of data/information is necessary because unorganized information has no meaning. In simple words, an organized collection of related information is known as database. The related information when placed is an organized form makes a database.