CREATE TABLE paperfield (fieldid NUMBER, paperid NUMBER)
CREATE TABLE paperkeyphrase (paperid NUMBER, keyphraseid NUMBER)
CREATE TABLE journal (journalid NUMBER, journalname VARCHAR2)
CREATE TABLE author (authorid NUMBER, authorname VARCHAR2)
CREATE TABLE field (fieldid NUMBER)
CREATE TABLE keyphrase (keyphraseid NUMBER, keyphrasename VARCHAR2)
CREATE TABLE paperdataset (paperid NUMBER, datasetid NUMBER)
CREATE TABLE venue (venueid NUMBER, venuename VARCHAR2)
CREATE TABLE dataset (datasetid NUMBER, datasetname VARCHAR2)
CREATE TABLE cite (citingpaperid NUMBER, citedpaperid NUMBER)
CREATE TABLE writes (paperid NUMBER, authorid NUMBER)
CREATE TABLE paper (paperid NUMBER, title VARCHAR2, venueid NUMBER, year NUMBER, numciting NUMBER, numcitedby NUMBER, journalid NUMBER)

what keyphrases get most citations ?
SELECT DISTINCT COUNT(cite.citingpaperid), keyphrase.keyphrasename FROM cite, keyphrase, paperkeyphrase WHERE paperkeyphrase.keyphraseid = keyphrase.keyphraseid AND paperkeyphrase.paperid = cite.citedpaperid GROUP BY keyphrase.keyphrasename ORDER BY COUNT(cite.citingpaperid) DESC
SELECT DISTINCT COUNT("cite"."citingpaperid"), "keyphrase"."keyphrasename" FROM "cite" JOIN "paperkeyphrase" ON "cite"."citedpaperid" = "paperkeyphrase"."paperid" JOIN "keyphrase" ON "keyphrase"."keyphraseid" = "paperkeyphrase"."keyphraseid" GROUP BY "keyphrase"."keyphrasename" ORDER BY COUNT("cite"."citingpaperid") DESC