Using another index and replace the missing values in the current index data.

[veerendra_modi]

I have a index say index1 having Air Details and ServerName of which some Air is missing for some serverNames.

I have another index say index2 in this index i am getting the Air details that are missing in index1.

Want to use index2 Air where i dont have values in index 1.

[richgalloway]

There needs to be a connection between index1 and index2 so Splunk knows which ServerName belongs to which Air Details.  Once you have that you can join the two indexes something like this

(index=index1 OR index=index2)
| stats values(*) as * by ServerName