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diff --git a/doc/examples.md b/doc/examples.md index 26ce002..4937cc5 100644 --- a/doc/examples.md +++ b/doc/examples.md @@ -151,6 +151,25 @@ You can also use a file input pipe as follows: dmap 'from STATS select $hostname,max($goroutines),max($cgocalls),$loadavg,lifetimeConnections group by $hostname order by max($cgocalls)' ``` +### Aggregating CSV files + +In essence, this works exactly like aggregating logs. All files operated on must be valid CSV files and the first line of the CSV must be the header. E.g.: + +```shell +% cat example.csv +name,lastname,age,profession +Michael,Jordan,40,Basketball player +Michael,Jackson,100,Singer +Albert,Einstein,200,Physician +% dmap --query 'select lastname,name where age > 40 logformat csv outfile result.csv' example.csv +% cat result.csv +lastname,name +Jackson,Michael +Einstein,Albert +``` + +DMap can also be used to query and aggregate CSV files from remote servers. + ### Other serverless commands The serverless mode works transparently with all other DTail commands. Here are some examples: |