"Waruna Geekiyanage" <waruna@xxxxxxxxxxx> writes: > does anyone here knows of a function that is similar to the sum function but > involves more than one column? for example, i have a table with columns id, > col1, col2 and col3. i want to get the max value from the three columns > gruped > by an id. > > what i came up with is something like this: > > max1=select max(one) from (select sum(col1) as one from table group by id); > max2=select max(two) from (select sum(col2) as two from table group by id); > max3=select max(three) from (select sum(col3) as three from table group by > id); select int4larger(int4larger(max(one),max(two)),max(three)) from table group by id; I'm a bit stumped why it seems I have to use "int4larger" and just "larger" doesn't work like with most functions. There must be a right way to do it without hard coding the datatype. -- greg
