ofcourseman

 Profile Answers by ofcourseman Questions by ofcourseman

• Oct 18th, 2006

 

It's is a simplest model for master process.creat was implement by insert employee record(write statement for VSAM and insert for DB2), update as the name(rewrite for VSAM and update for DB2) and list was done by inquire the file/database(read for VSAM and select for DB2). If you use VSAM or other file system, you should code file declaration in file section.

Priyakk

 Profile Answers by Priyakk 

• Mar 14th, 2007

 

To start with, lets consider sequential files to be simple. In the IO Section of the Environment Division, assign a sequential file which is the master file and in the Data Division include all the field names given in the quesion under the FD entry. Do the same for a sequential file from which the data must be written to the master file. 
   CREATION: OPEN the input file and WRITE the records into the master file.
   UPDATION: For any file to be updated, it m,ust be opened in the IO mode and use  REWRITE to update the records whicch are already present int he master file. to add new records to the master file it must be opened in the EXTEND mode.
  LISTING: To display all the records from the master file, DISPLAY can be used to get the records on to the VDU.or to have the records in a new file, it can be written to an another file using WRITE.

NOTE:

Everytime a file is opened in a mode, to open it in an another mode...the file must be closed and then opened in the other mode.