Hi,
how to get the timestamp of e.g. first record in the day?
My measurement nmap consists of records of IP addresses responding to nmap command.
I can easily get number or records group by day:
SELECT count("state_num")/4 as cnt_records, min(time) as min_time FROM nmap WHERE (ipv4_addr = '192.168.32.83') GROUP BY time(1d)
name: nmap
time cnt_records min_time
---- ----------- --------
2020-05-12T00:00:00Z 7.75
2020-05-13T00:00:00Z 5.25
2020-05-14T00:00:00Z 0
2020-05-15T00:00:00Z 0
2020-05-16T00:00:00Z 0
2020-05-17T00:00:00Z 0
2020-05-18T00:00:00Z 5.25
2020-05-19T00:00:00Z 7
2020-05-20T00:00:00Z 9.5
2020-05-21T00:00:00Z 4.25
2020-05-22T00:00:00Z 7
2020-05-23T00:00:00Z 0
2020-05-24T00:00:00Z 0.5
2020-05-25T00:00:00Z 4
2020-05-26T00:00:00Z 3.25
2020-05-27T00:00:00Z 11.5
2020-05-28T00:00:00Z 0.5
but min(time) as min_time returns null values.
How to get expected results – timestamps of the first record in the day?
