I want a field to be unique while reporting so can you help on how to set via filter or JQL?

[Srikanth Doddapaneni]

I have Jira issue type with a field called CODE.

Example :

Field	Jira 1	Jira 2	Jira 3
CODE	SR01	SR01	SR01

I'm using Issue statistics gadget and getting the count as 3 but I want the count as 1. Is there any way to set the CODE value as unique? 

[Nic Brough -Adaptavist-]

Welcome to the Atlassian Community!

You would need to write a validator that can stop people putting non-unique data into the field.

But I would not do that, I would recommend looking at why you think you want unique data in the field.  It's usually pointless because the point of a field is to report on related things, and in the few cases where you do need it, it's usually better done in other ways (not using unique values in fields or automating something)