Hi,
In QGIS 2.16 (and also in 2.14), there's a Statistic panel (View menu -->
Panels) that offers some stats on any fields (note that only numeric fields
are available in QGIS 2.14).

In 2.16, there are also aggregate functions
<http://qgis.org/en/site/forusers/visualchangelog216/index.html#feature-aggregate-support-for-expressions>
(min, max, mean....) you can use in any expression widget, including Field
calculator. So unless I misunderstood your need, yes, it's possible to
retrieve the greatest value of a field.

HTH,
Harrissou

2016-08-30 17:53 GMT+02:00 Bernd Vogelgesang <bernd.vogelges...@gmx.de>:

> Hi,
> I asked a simliar question 4 years ago on stackexchange
> http://gis.stackexchange.com/q/30708/8202
>
> But it all depends on the use case and data.
>
> Cheers
> Bernd
>
>
> Am 30.08.2016, 14:21 Uhr, schrieb Bia <bia.fs2...@gmail.com>:
>
> 2 questions:
> 1) in the field calculator as I can, for example, find the greatest value
> of a column?
>
> 2) Can I compare different tables (different shapfiles) to for example
> obtain a value of contamination concentration in tables with different
> concentrations and dates?
>
> Tanks!
>
> 2016-08-30 9:20 GMT-03:00 Bia <bia.fs2...@gmail.com>:
>
>> 2 questions:
>> 1) in the field calculator as I can, for example, find the greatest value
>> of a column?
>>
>> 2) Can I compare different tables (different shapfiles) to for example
>> obtain a value of contamination concentration in tables with different
>> concentrations and dates?
>>
>> Tanks!
>>
>> 2016-08-30 8:55 GMT-03:00 Tyler Veinot <tylerkvei...@gmail.com>:
>>
>>> Bia;
>>> Compare in what way? You can export the sheets to CSV or DBF and add
>>> them to your project, from there you can join common data types, use the
>>> field calculator to manipulate the data, display XY coordinates.
>>>
>>> On Tue, Aug 30, 2016 at 7:19 AM, Bia <bia.fs2...@gmail.com> wrote:
>>>
>>>> Good morning!
>>>> Is there a way to compare different spreadsheets data in qgis?
>>>>
>>>> Tk u
>>>>
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>>>
>>>
>>
>>
>> --
>> Bea
>>
>
>
>
> --
> Bea
>
>
>
>
> --
> Bernd Vogelgesang
> Siedlerstra├če 2
> 91083 Baiersdorf/Igelsdorf
> Tel: 09133-825374
>
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