File organisation types. BCA( 5th semester).

 1). Sequence method:- In the sequence mathod are the record of the students and employs etc. It is share Data only sequence wise. Sequence method is a logical sequence of the primary key value which identifies a particular record. The processing of a sequence. File is a very simple and understood all the user. Which help to calculate and operate complete data base manage system.

2). Direct method:- in the Direct method a file store in different location but process with the help of different shortcut in the desktop windows. It is more flexible and suitable method for access direct file in the memory.

3). Index method:- In the index sequence method user of file name, address and position of file which store in any storage area. It describes the different index value. Which store in data file and define a data records. It provides random access value through the primary and secondary key.

Index table

Name.         Address

A.                    10

B.                     13

C.                     14

D.                    6

Data records:-

Name.         Address.              File record

A.                     10.                          Object

B.                      13.                          Record

C.                       14.                          Groups

D.                        6.                         File