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

what author is most cited ?
SELECT DISTINCT author.authorname, COUNT(cite.citingpaperid) FROM author, cite, writes WHERE writes.authorid = author.authorid AND writes.paperid = cite.citedpaperid GROUP BY author.authorname ORDER BY COUNT(cite.citingpaperid) DESC
SELECT DISTINCT "author"."authorname", COUNT("cite"."citingpaperid") FROM "author" JOIN "writes" ON "author"."authorid" = "writes"."authorid" JOIN "cite" ON "cite"."citedpaperid" = "writes"."paperid" GROUP BY "author"."authorname" ORDER BY COUNT("cite"."citingpaperid") DESC