Top "Groupwise-maximum" questions

SQL select only rows with max value on a column

I have this table for documents (simplified version here): +------+-------+--------------------------------------+ | id | rev | content | +------+-------+--------------------------------------+ | 1 | 1 | ... | | 2 | 1 | ... | | 1 | 2 | ... | | 1 | 3 | ... | +------+-------+…

mysql sql aggregate-functions greatest-n-per-group groupwise-maximum

LEFT JOIN only first row

I read many threads about getting only the first row of a left join, but, for some reason, this does …

mysql join left-join groupwise-maximum

select rows with largest value of variable within a group in r

a.2<-sample(1:10,100,replace=T) b.2<-sample(1:100,100,replace=T) a.3<-data.frame(a.2,b.2) r<-sapply(split(…

r groupwise-maximum