问题
Let's say I have a table with the columns country, continent and population.
How can I use the QUERY function in Google Spreadsheets to select, for each continent, only the country with the highest population?
In regular SQL I think I'd use HAVING, but this doesn't seem to be an option here.
回答1:
=SORTN(SORT(G:J,4,0),2^99,2,3,0)
- SORT by population in descending order,if not done already
- Remove Duplicates with SORTN
回答2:
I suggest a helper column, say K with:
=if(maxifs(J:J,I:I,I2)=J2,"#","")
in K2 and copied down to suit, then:
=query(G:K,"select I,H,J where K is not NULL")
回答3:
A couple of suggestions (both a bit long) where I've got Rank, Country and Continent in columns A, B and C (sorry it would have taken me too long to type in the populations)
To get a list in descending order of rank:
=ArrayFormula({unique(filter(C:C,C:C<>"")),
vlookup(Query(A:C,"select min(A) where A is not null group by C order by min(A) label min(A) 'Rank'"),A:C,2,false)})
To get a list in alphabetical order of continent:
=ArrayFormula({Query(A:C,"select C,min(A) where A is not null group by C label min(A) 'Rank'"),
vlookup(Query(A:C,"select min(A) where A is not null group by C label min(A) 'Rank'"),A:C,2,false)})
Although the list (I imagine) would go all the way down to Vatican City (pop about 1,000) most countries have at least several thousand inhabitants so I guess ties are pretty unlikely :-)
UPDATE - with population data
回答4:
In QUERY method Select Continent, maximum of the population and need to group by Continent:
=QUERY(Countries,"select I, max(J) GROUP BY I",1)
This will return the below results from the table:
Continent max Population
Africa 173615345
Asia 1385566537
Australia 23342553
Europe 82726626
North America 320050716
South America 200361925
来源：https://stackoverflow.com/questions/51124612/google-spreadsheets-how-to-query-countries-with-max-population-by-continent