John, What is R?
-----Original Message----- From: ext John Meagher [mailto:john.meag...@gmail.com] Sent: Wednesday, August 08, 2012 4:34 PM To: user@hive.apache.org Subject: Re: Converting rows into dynamic colums in Hive I don't think having dynamic columns is possible in Hive. I've always output from Hive a structure like your query output and used R to convert it into a dynamic column structure. On Wed, Aug 8, 2012 at 3:56 PM, <richin.j...@nokia.com> wrote: > Thanks Ashish, that gives an idea. > > But I am not sure about the outer select loop, I have to know all the > values in Beta column beforehand to do a max on each value. > > Is there a better way? > > > > Richin > > > > From: ext Ashish Thusoo [mailto:athu...@qubole.com] > Sent: Tuesday, August 07, 2012 5:05 PM > To: user@hive.apache.org > Subject: Re: Converting rows into dynamic colums in Hive > > > > you should be able to do this in hive using a group by on alpha and > then using a combination of the max and if statement... something on > the following lines > > select alpha, max(abc), max(pqr), ... > ( > select alpha, if (beta == 'abc', Gamma, NULL) as abc, if (beta == > 'pqr', Gamma, NUL) as pqr, .... > from table > ) > group by alpha > > something on those lines... > > Ashish > > On Tue, Aug 7, 2012 at 1:57 PM, <richin.j...@nokia.com> wrote: > > Hi All, > > > > One of my Query output looks like- > > > > Alpha Beta Gamma > > 123 xyz 1.0 > > 123 abc 0.5 > > 123 pqr 1.3 > > 123 def 2.1 > > 456 xyz 0.1 > > 456 abc 0.6 > > 456 pqr 1.9 > > 456 def 3.2 > > 456 lmn 1.1 > > 456 sdf 1.2 > > > > I want the output for the data visualization purpose to look like > (basically taking rows from one table and making it column in another > table) > > > > Alpha xyz abc pqr def lmn > sdf > > 123 1.0 0.5 1.3 2.1 > > 456 0.1 0.6 1.9 3.2 > 1.1 1.2 > > > > Question - Can it be done in Hive? If not, any suggestions. > > > > Thanks, > > Richin > > > > > >
