What is a key field in an IMS database?
Answers were Sorted based on User's Feedback
Answer / deepak
Key field - used to uniquely identify the records in the
segment
| Is This Answer Correct ? | 15 Yes | 4 No |
Answer / bharathi
A Key field in IMS DB of a segment is a field or group of fields which assist in sorting the segment occurrences in ascending order.
This key field is not necessarily to be unique.
| Is This Answer Correct ? | 6 Yes | 3 No |
Answer / nagesh
DL/I to maintain segment in Ascending order other than key sequence.
| Is This Answer Correct ? | 1 Yes | 0 No |
Answer / s
Key field and sequence field are synonymous. It is used to
access a specific root segment and hence a specific
database record.
| Is This Answer Correct ? | 1 Yes | 8 No |
I found some good questions/answers regarding IMS here:
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What are the disadvantages of a hierarchical database?
How many root segments do we have per database record?
Define ims (db/dc)?
What is the return code you get after a successful IMS call?
What is the maximum of key fields and search fields allowed in a segment?
Static & Dynamic PSB
What are the command codes and their purposes?
An application programmer comes to you and says your DB is no good, they got an II status code on an insert call from IMS, is this a DB problem?
What are the retrieval sequences in ims db?
How can we distinguish between an online and batch program in IMS environment?