AWS CloudWatch Log Insights Get Count of Unique Logs - gecko-8/devwiki GitHub Wiki

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You can use the "| dedup " filter.

For example, to get the unique message_ids in a list of logs with NullReferenceException in the @message field:

fields message_id, @message 
| filter @message LIKE /NullReferenceException/ 
| sort @timestamp asc 
| dedup message_id
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