Hi Harsh,

It might be worth mentioning this KB which makes some observations specific to ServiceNow

ServiceNow KB: Table API FAQs (KB0534905)

11.

What is the difference between PUT and PATCH?

In the REST world, PUT and PATCH have different semantics. PUT means replace the entire resource with given data (so null out fields if they are not provided in the request), while PATCH means replace only specified fields.   For the Table API, however, PUT and PATCH mean the same thing.   PUT and PATCH modify only the fields specified in the request.

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