CREATE TABLE venue (venueid INT, venuename VARCHAR)
CREATE TABLE writes (paperid INT, authorid INT)
CREATE TABLE author (authorid INT, authorname VARCHAR)
CREATE TABLE paperfield (fieldid INT, paperid INT)
CREATE TABLE field (fieldid INT)
CREATE TABLE paperdataset (paperid INT, datasetid INT)
CREATE TABLE keyphrase (keyphraseid INT, keyphrasename VARCHAR)
CREATE TABLE journal (journalid INT, journalname VARCHAR)
CREATE TABLE paperkeyphrase (paperid INT, keyphraseid INT)
CREATE TABLE paper (paperid INT, title VARCHAR, venueid INT, year INT, numciting INT, numcitedby INT, journalid INT)
CREATE TABLE cite (citingpaperid INT, citedpaperid INT)
CREATE TABLE dataset (datasetid INT, datasetname VARCHAR)

when were most NIPS papers published ?
SELECT DISTINCT COUNT(paper.paperid), paper.year FROM paper, venue WHERE venue.venueid = paper.venueid AND venue.venuename = 'NIPS' GROUP BY paper.year ORDER BY COUNT(paper.paperid) DESC
SELECT DISTINCT COUNT("paper"."paperid"), "paper"."year" FROM "paper" JOIN "venue" ON "paper"."venueid" = "venue"."venueid" AND "venue"."venuename" = 'NIPS' GROUP BY "paper"."year" ORDER BY COUNT("paper"."paperid") DESC NULLS LAST