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1. Log into your Jira as Admin.
2. Go to ensure the type of the custom field is Autocomplete on the field configuration page.
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3. Go to an issue in Jira and try to edit it first. The database custom fields will appear like any other custom field. When trying to edit an issue, the sql is executed and the results will be available through autocomplete.
   
   
   
   
4. Type the first letter of a possible value and a list of options will appear. From these options you can select one for the current field. When you select a value for the main database custom field, the value for the child database custom field is filled in automatically, see an example in the picture below.
   
   
   
   
5. Now that the fields are filled in, you can update the issue with the provided values.
   
   
   
   
6. After you update the issue, the values are displayed as details of that issue.

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