Re: [sqlite] What average is avg()?
On 30 Jul 2014, at 8:51am, Clemens Ladisch wrote: > Jonathan Moules wrote: >> Which type of average does avg() calculate? >> >> I guess it's the mean, but it could be median or mode, so worth asking. > > The SQL standard says it's the mean. Might be worth noting that avg() treats null values the same way that sum() treats nulls: it ignores them and does not include them in the divisor, unless all the values are null, in which case it returns null. This may not be what you are expecting. Simon. ___ sqlite-users mailing list sqlite-users@sqlite.org http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-users
Re: [sqlite] What average is avg()?
The convention, as far as I am aware, is "Average" always refers to the "Mean Average" unless explicitly stated otherwise. Modes and Medians are usually specific to certain arms of the calculati. Having said that, probably a good idea to add the note to the docs regardless. On 2014/07/30 09:38, Jonathan Moules wrote: Hi List, A question and possible suggestion. Which type of average does avg() calculate? The documentation doesn't say - https://www.sqlite.org/lang_aggfunc.html I guess it's the mean, but it could be median or mode, so worth asking. My suggestion would be to include an explicit statement in the docs saying which it is to make it clearer for users. Cheers, Jonathan ___ sqlite-users mailing list sqlite-users@sqlite.org http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-users
Re: [sqlite] What average is avg()?
Jonathan Moules wrote: > Which type of average does avg() calculate? > > I guess it's the mean, but it could be median or mode, so worth asking. The SQL standard says it's the mean. Regards, Clemens ___ sqlite-users mailing list sqlite-users@sqlite.org http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-users
[sqlite] What average is avg()?
Hi List, A question and possible suggestion. Which type of average does avg() calculate? The documentation doesn't say - https://www.sqlite.org/lang_aggfunc.html I guess it's the mean, but it could be median or mode, so worth asking. My suggestion would be to include an explicit statement in the docs saying which it is to make it clearer for users. Cheers, Jonathan -- This transmission is intended for the named addressee(s) only and may contain confidential, sensitive or personal information and should be handled accordingly. Unless you are the named addressee (or authorised to receive it for the addressee) you may not copy or use it, or disclose it to anyone else. If you have received this transmission in error please notify the sender immediately. All email traffic sent to or from us, including without limitation all GCSX traffic, may be subject to recording and/or monitoring in accordance with relevant legislation. ___ sqlite-users mailing list sqlite-users@sqlite.org http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-users
