Use the AS operator. I know you mentioned it wasn't working, but I've yet to see a single actual bug with AS, so I suspect it was a syntax issue.
Try: SELECT first(mac) AS mac, first(crc_failures) AS crc_failures, first(snr_ncc) AS snr_ncc, first(snr_rt) AS snr_rt FROM rt_stats."default".snr_stat WHERE time > now() - 7m GROUP BY time(1m) As for strings, currently no functions operate on strings except for COUNT(). On Fri, Aug 12, 2016 at 3:10 AM, <[email protected]> wrote: > Thank you for your response. > > I might have been wrong on the terminology, what I mean is that the > *fields* in the measurements get renamed to first, first_1, first_2 etc. > Which is a problem since my queries relies on them and I want to use the > same/similar queries for downsampled data. > > This is an example of my data: > snr_stat > timecrc_failuresmacnamesnr_nccsnr_rt > 2016-05-19T06:56:58Z 1987 "40001" "Pivatn" 144 24 > 2016-05-19T06:56:58Z 1822 "40002" "Nowuxvatn" 155 250 > 2016-05-19T06:56:59Z 1987 "40001" "Pivatn" 145 24 > 2016-05-19T06:56:59Z 1822 "40002" "Nowuxvatn" 154 250My problem is that > "SELECT first(mac), first(crc_failures), first(snr_ncc), first(snr_rt) FROM > rt_stats."default".snr_stat WHERE time > now() - 7m GROUP BY time(1m)" > returns: > > snr_stat > timefirstfirst_1first_2first_3 > 2016-08-12T08:57:00Z > 4535 225 87 > 2016-08-12T08:58:00Z > 4538 230 93 > 2016-08-12T08:59:00Z > 4539 228 102and as you see, I've now lost the original fields names, > which are now replaced by "first", "first_1" etc. > > Another problem is that the "first()" operator does only work on numerals, > not strings... > > I really hope that there is a solution to this, any help would be highly > appreciated. > > > Kind regards, Peter > > > fredag 12. august 2016 00.08.58 UTC+2 skrev Sean Beckett følgende: >> >> Did you include a "GROUP BY *" clause in the CQ? That should preserve all >> tags. The AS keyword is used to rename items in the SELECT clause. There's >> no need to put the tags in the SELECT clause if you are using GROUP BY *. >> >> On Thu, Aug 11, 2016 at 1:32 AM, <[email protected]> wrote: >> >>> Quick question Sean. I made an CQ like the one you mention, but my >>> problem now is that the tags end up like: >>> first_1first_2first_3Ideally I would want the data, and tags to be just >>> like the source, just with lower resolution? Is that possible? (I did try >>> the "as" operator and the tag name, but that did not work.) >>> >>> Regards, >>> Peter >>> >>> tirsdag 2. august 2016 20.09.24 UTC+2 skrev Sean Beckett følgende: >>>> >>>> There are no query language operators or functions that select points >>>> based on ordinality. The best current solution to your need is to use a CQ, >>>> which won't introduce noticable additional storage or load, unless you are >>>> running on a very low power device. >>>> >>>> CREATE CQ... >>>> SELECT FIRST(value) AS "60th_point" INTO bar FROM foo GROUP BY >>>> time(1m), * >>>> END >>>> >>>> That will store the point from xx:xx:00 in the new "bar" measurement. >>>> >>>> On Tue, Aug 2, 2016 at 8:19 AM, <[email protected]> wrote: >>>> >>>>> Hi guys, >>>>> >>>>> I'm trying to figure out how to query every n-th value of a time >>>>> series measurement? Lets say that I store a point every second, and later >>>>> want to query every 60th point from time x to time y? >>>>> >>>>> I've seen there are CQs that can make the downsampled data, but for my >>>>> use case it does not make sense since it will only add to more load and >>>>> storage being used. Performance wise it shouldn't be any harder/slower >>>>> either to query 100 point that are not adjacent compared to 100 that are, >>>>> or am I wring here? >>>>> >>>>> Thanks, >>>>> Peter >>>>> >>>>> -- >>>>> Remember to include the InfluxDB version number with all issue reports >>>>> --- >>>>> You received this message because you are subscribed to the Google >>>>> Groups "InfluxDB" group. >>>>> To unsubscribe from this group and stop receiving emails from it, send >>>>> an email to [email protected]. >>>>> To post to this group, send email to [email protected]. >>>>> Visit this group at https://groups.google.com/group/influxdb. >>>>> To view this discussion on the web visit >>>>> https://groups.google.com/d/msgid/influxdb/aa778b27-3257-42f >>>>> 3-96a5-3b7c3158ad1f%40googlegroups.com >>>>> <https://groups.google.com/d/msgid/influxdb/aa778b27-3257-42f3-96a5-3b7c3158ad1f%40googlegroups.com?utm_medium=email&utm_source=footer> >>>>> . >>>>> For more options, visit https://groups.google.com/d/optout. >>>>> >>>> >>>> >>>> >>>> -- >>>> Sean Beckett >>>> Director of Support and Professional Services >>>> InfluxDB >>>> >>> -- >>> Remember to include the InfluxDB version number with all issue reports >>> --- >>> You received this message because you are subscribed to the Google >>> Groups "InfluxDB" group. >>> To unsubscribe from this group and stop receiving emails from it, send >>> an email to [email protected]. >>> To post to this group, send email to [email protected]. >>> Visit this group at https://groups.google.com/group/influxdb. >>> To view this discussion on the web visit https://groups.google.com/d/ms >>> gid/influxdb/d03b8f58-af24-4a3b-b240-0ad88bb27a74%40googlegroups.com >>> <https://groups.google.com/d/msgid/influxdb/d03b8f58-af24-4a3b-b240-0ad88bb27a74%40googlegroups.com?utm_medium=email&utm_source=footer> >>> . >>> >>> For more options, visit https://groups.google.com/d/optout. >>> >> >> >> >> -- >> Sean Beckett >> Director of Support and Professional Services >> InfluxDB >> > -- > Remember to include the InfluxDB version number with all issue reports > --- > You received this message because you are subscribed to the Google Groups > "InfluxDB" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > To post to this group, send email to [email protected]. > Visit this group at https://groups.google.com/group/influxdb. > To view this discussion on the web visit https://groups.google.com/d/ > msgid/influxdb/fa7a21ac-8330-4371-979e-10b03604c9c1%40googlegroups.com > <https://groups.google.com/d/msgid/influxdb/fa7a21ac-8330-4371-979e-10b03604c9c1%40googlegroups.com?utm_medium=email&utm_source=footer> > . > > For more options, visit https://groups.google.com/d/optout. > -- Sean Beckett Director of Support and Professional Services InfluxDB -- Remember to include the InfluxDB version number with all issue reports --- You received this message because you are subscribed to the Google Groups "InfluxDB" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at https://groups.google.com/group/influxdb. To view this discussion on the web visit https://groups.google.com/d/msgid/influxdb/CALGqCvM93twjJ%2Bx7TEABUfbQ5DnDbJXTNjNAGanR5Z-hJDN6BQ%40mail.gmail.com. For more options, visit https://groups.google.com/d/optout.
