the fields
command can be used to set the order of the fields. Please have a look at the following sample
fetch logs
| fields timestamp, log.source, content
With the fields command you not only specify which fields should be displayed, but also its order. So you need to specify all fields which you want to be visible
For further info, please have a look at the documentation of the command:
https://www.dynatrace.com/support/help/shortlink/dql-commands#fields