Weird result using group by












0















I help run a small radio station and we log stats in to a MySQL database.
I have started seeing weird results when using the following code to grab peaks for each entry logged in the stats table.



I have tried a few things in the code but not seen any change in results so far.



SELECT *

FROM

(

SELECT

stat_utc,

stat_master_count,

stat_master_track

FROM

stats_all_master

ORDER BY

stat_master_count DESC,

stat_utc DESC

) AS my_table_tmp

GROUP BY

stat_master_track

ORDER BY

stat_master_count DESC,

stat_utc DESC

LIMIT 5;



If I remove the GROUP BY stat_master_track I see results with higher stat_count.



With GROUP BY:



41 LIVE SHOW ~ Erebuss - Mixset Showcase Mix 2018 (29/12/18)

41 Mixset ~ Inna Rhythm Recordings - Mix 01 (2015)

39 LIVE SHOW ~ DJ Ransome - Mixset Showcase 2017

38 LIVE SHOW ~ Parts Unknown - PartsUnknown #007

37 LIVE SHOW ~ MrKrotos - Mixset Showcase 2018 Part 2 (2018-12-29)



Without GROUP BY I see records with higher count like:



51 LIVE SHOW ~ DnB_Bo - Mixset Showcase Mix 2018 Part 1 (29/12/18)

47 LIVE SHOW ~ Erebuss - Renegade sessions #0006 (UK)

46 LIVE SHOW ~ DnB_Bo - Mixset Showcase Mix 2018 Part 1 (29/12/18)






sorting group-by







share|improve this question

























  • Could you give us a snapshot of your data? It's hard to tell what each of these columns refer to.

    – redreddington
    Dec 31 '18 at 16:58











  • Hi there, I have a shot of the table @ dropbox.com/s/lw4qh61mo36w8w9/table.png?dl=0

    – Andy
    Dec 31 '18 at 17:02











  • Hi, thanks for posting the structure, I was more after a couple of individual rows of data - for example what is actually contained within the stat_master_track column?

    – redreddington
    Dec 31 '18 at 17:16











  • Test data dump @ dropbox.com/s/pyp9wqdy3txvfu7/test%20data.sql?dl=0

    – Andy
    Dec 31 '18 at 17:17











  • Sorry just seen your comment, I have a test data dump above I just uploaded, took a few minutes to get that data together

    – Andy
    Dec 31 '18 at 17:18
















0















I help run a small radio station and we log stats in to a MySQL database.
I have started seeing weird results when using the following code to grab peaks for each entry logged in the stats table.



I have tried a few things in the code but not seen any change in results so far.



SELECT *

FROM

(

SELECT

stat_utc,

stat_master_count,

stat_master_track

FROM

stats_all_master

ORDER BY

stat_master_count DESC,

stat_utc DESC

) AS my_table_tmp

GROUP BY

stat_master_track

ORDER BY

stat_master_count DESC,

stat_utc DESC

LIMIT 5;



If I remove the GROUP BY stat_master_track I see results with higher stat_count.



With GROUP BY:



41 LIVE SHOW ~ Erebuss - Mixset Showcase Mix 2018 (29/12/18)

41 Mixset ~ Inna Rhythm Recordings - Mix 01 (2015)

39 LIVE SHOW ~ DJ Ransome - Mixset Showcase 2017

38 LIVE SHOW ~ Parts Unknown - PartsUnknown #007

37 LIVE SHOW ~ MrKrotos - Mixset Showcase 2018 Part 2 (2018-12-29)



Without GROUP BY I see records with higher count like:



51 LIVE SHOW ~ DnB_Bo - Mixset Showcase Mix 2018 Part 1 (29/12/18)

47 LIVE SHOW ~ Erebuss - Renegade sessions #0006 (UK)

46 LIVE SHOW ~ DnB_Bo - Mixset Showcase Mix 2018 Part 1 (29/12/18)






sorting group-by







share|improve this question

























  • Could you give us a snapshot of your data? It's hard to tell what each of these columns refer to.

    – redreddington
    Dec 31 '18 at 16:58











  • Hi there, I have a shot of the table @ dropbox.com/s/lw4qh61mo36w8w9/table.png?dl=0

    – Andy
    Dec 31 '18 at 17:02











  • Hi, thanks for posting the structure, I was more after a couple of individual rows of data - for example what is actually contained within the stat_master_track column?

    – redreddington
    Dec 31 '18 at 17:16











  • Test data dump @ dropbox.com/s/pyp9wqdy3txvfu7/test%20data.sql?dl=0

    – Andy
    Dec 31 '18 at 17:17











  • Sorry just seen your comment, I have a test data dump above I just uploaded, took a few minutes to get that data together

    – Andy
    Dec 31 '18 at 17:18














0












0








0








I help run a small radio station and we log stats in to a MySQL database.
I have started seeing weird results when using the following code to grab peaks for each entry logged in the stats table.



I have tried a few things in the code but not seen any change in results so far.



SELECT *

FROM

(

SELECT

stat_utc,

stat_master_count,

stat_master_track

FROM

stats_all_master

ORDER BY

stat_master_count DESC,

stat_utc DESC

) AS my_table_tmp

GROUP BY

stat_master_track

ORDER BY

stat_master_count DESC,

stat_utc DESC

LIMIT 5;



If I remove the GROUP BY stat_master_track I see results with higher stat_count.



With GROUP BY:



41 LIVE SHOW ~ Erebuss - Mixset Showcase Mix 2018 (29/12/18)

41 Mixset ~ Inna Rhythm Recordings - Mix 01 (2015)

39 LIVE SHOW ~ DJ Ransome - Mixset Showcase 2017

38 LIVE SHOW ~ Parts Unknown - PartsUnknown #007

37 LIVE SHOW ~ MrKrotos - Mixset Showcase 2018 Part 2 (2018-12-29)



Without GROUP BY I see records with higher count like:



51 LIVE SHOW ~ DnB_Bo - Mixset Showcase Mix 2018 Part 1 (29/12/18)

47 LIVE SHOW ~ Erebuss - Renegade sessions #0006 (UK)

46 LIVE SHOW ~ DnB_Bo - Mixset Showcase Mix 2018 Part 1 (29/12/18)






sorting group-by







share|improve this question
















I help run a small radio station and we log stats in to a MySQL database.
I have started seeing weird results when using the following code to grab peaks for each entry logged in the stats table.



I have tried a few things in the code but not seen any change in results so far.



SELECT *

FROM

(

SELECT

stat_utc,

stat_master_count,

stat_master_track

FROM

stats_all_master

ORDER BY

stat_master_count DESC,

stat_utc DESC

) AS my_table_tmp

GROUP BY

stat_master_track

ORDER BY

stat_master_count DESC,

stat_utc DESC

LIMIT 5;



If I remove the GROUP BY stat_master_track I see results with higher stat_count.



With GROUP BY:



41 LIVE SHOW ~ Erebuss - Mixset Showcase Mix 2018 (29/12/18)

41 Mixset ~ Inna Rhythm Recordings - Mix 01 (2015)

39 LIVE SHOW ~ DJ Ransome - Mixset Showcase 2017

38 LIVE SHOW ~ Parts Unknown - PartsUnknown #007

37 LIVE SHOW ~ MrKrotos - Mixset Showcase 2018 Part 2 (2018-12-29)



Without GROUP BY I see records with higher count like:



51 LIVE SHOW ~ DnB_Bo - Mixset Showcase Mix 2018 Part 1 (29/12/18)

47 LIVE SHOW ~ Erebuss - Renegade sessions #0006 (UK)

46 LIVE SHOW ~ DnB_Bo - Mixset Showcase Mix 2018 Part 1 (29/12/18)






sorting group-by




sorting group-by






share|improve this question















share|improve this question













share|improve this question




share|improve this question








edited Dec 31 '18 at 16:59







Andy

















asked Dec 31 '18 at 16:53









AndyAndy

257




257













  • Could you give us a snapshot of your data? It's hard to tell what each of these columns refer to.

    – redreddington
    Dec 31 '18 at 16:58











  • Hi there, I have a shot of the table @ dropbox.com/s/lw4qh61mo36w8w9/table.png?dl=0

    – Andy
    Dec 31 '18 at 17:02











  • Hi, thanks for posting the structure, I was more after a couple of individual rows of data - for example what is actually contained within the stat_master_track column?

    – redreddington
    Dec 31 '18 at 17:16











  • Test data dump @ dropbox.com/s/pyp9wqdy3txvfu7/test%20data.sql?dl=0

    – Andy
    Dec 31 '18 at 17:17











  • Sorry just seen your comment, I have a test data dump above I just uploaded, took a few minutes to get that data together

    – Andy
    Dec 31 '18 at 17:18



















  • Could you give us a snapshot of your data? It's hard to tell what each of these columns refer to.

    – redreddington
    Dec 31 '18 at 16:58











  • Hi there, I have a shot of the table @ dropbox.com/s/lw4qh61mo36w8w9/table.png?dl=0

    – Andy
    Dec 31 '18 at 17:02











  • Hi, thanks for posting the structure, I was more after a couple of individual rows of data - for example what is actually contained within the stat_master_track column?

    – redreddington
    Dec 31 '18 at 17:16











  • Test data dump @ dropbox.com/s/pyp9wqdy3txvfu7/test%20data.sql?dl=0

    – Andy
    Dec 31 '18 at 17:17











  • Sorry just seen your comment, I have a test data dump above I just uploaded, took a few minutes to get that data together

    – Andy
    Dec 31 '18 at 17:18

















Could you give us a snapshot of your data? It's hard to tell what each of these columns refer to.

– redreddington
Dec 31 '18 at 16:58





Could you give us a snapshot of your data? It's hard to tell what each of these columns refer to.

– redreddington
Dec 31 '18 at 16:58













Hi there, I have a shot of the table @ dropbox.com/s/lw4qh61mo36w8w9/table.png?dl=0

– Andy
Dec 31 '18 at 17:02





Hi there, I have a shot of the table @ dropbox.com/s/lw4qh61mo36w8w9/table.png?dl=0

– Andy
Dec 31 '18 at 17:02













Hi, thanks for posting the structure, I was more after a couple of individual rows of data - for example what is actually contained within the stat_master_track column?

– redreddington
Dec 31 '18 at 17:16





Hi, thanks for posting the structure, I was more after a couple of individual rows of data - for example what is actually contained within the stat_master_track column?

– redreddington
Dec 31 '18 at 17:16













Test data dump @ dropbox.com/s/pyp9wqdy3txvfu7/test%20data.sql?dl=0

– Andy
Dec 31 '18 at 17:17





Test data dump @ dropbox.com/s/pyp9wqdy3txvfu7/test%20data.sql?dl=0

– Andy
Dec 31 '18 at 17:17













Sorry just seen your comment, I have a test data dump above I just uploaded, took a few minutes to get that data together

– Andy
Dec 31 '18 at 17:18





Sorry just seen your comment, I have a test data dump above I just uploaded, took a few minutes to get that data together

– Andy
Dec 31 '18 at 17:18












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