IBM Mainframe Forum

I have been given an flat file from which i have to read records on roll number match and update the same in KSDS file.Can anyone explain me the logic and give me the program for it?

No - we do not give programs unless you pay for them.

Now - where are you stuck?

well i am new to mainframe,well i can read the records from flat file based on roll no match but i dnt know the stuff of how to update the same in KSDS file.

Plus i have been given only 1 flat file so with what i need to match the roll numbers

Preumably the 'roll numbers' (whatever they are) are the keys into the VSAM file. As the VSAM file is in key sequence you should first sort your flat file into the key sequence. Then read the flat file a record at a time, use the key field from there to retrieve the record with that key from the VSAM file. If the record is found - do whatever, if not found then do something else. Does that sound logical to you?

yup