i want to display the time intearval today and last 30 days i want to display the difference between these to days how we can wright query

[mahendra559]

| mstats c(System.System_Up_Time) as Uptime prestats=t WHERE index="em_metrics" AND host="*" by host,metric_name span=1m
| where Uptime < (now() - 2160000)
| eval diff=tostring(now() - Uptime,"duration")
| fields host Uptime diff
| sort – Uptime

getting no result
i have 2 hosts one host is coming metric log(System.System_Up_Time) other host is not coming so i want to display it as down

[to4kawa]

please try line by line.
getting no result
where?

| mstats c(System.System_Up_Time) as Uptime prestats=t WHERE index="em_metrics" AND host="*" by host,metric_name span=1m
| inputlookup append=t hostname.csv
| fillnull Uptime
| where Uptime < (now() - 2160000)
| eval diff=tostring(now() - Uptime,"duration")
| fields host Uptime diff
| sort – Uptime

hostname.csv

host
HostA
HostB

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