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

What year did Ye Cao publish the most papers
SELECT DISTINCT COUNT(DISTINCT paper.paperid), paper.year FROM author, paper, writes WHERE author.authorname LIKE 'Ye Cao' AND writes.authorid = author.authorid AND writes.authorid = author.authorid AND writes.paperid = paper.paperid GROUP BY paper.year ORDER BY COUNT(DISTINCT paper.paperid) DESC
SELECT DISTINCT COUNT(DISTINCT "paper"."paperid"), "paper"."year" FROM "author" JOIN "writes" ON "author"."authorid" = "writes"."authorid" JOIN "paper" ON "paper"."paperid" = "writes"."paperid" WHERE "author"."authorname" LIKE 'Ye Cao' GROUP BY "paper"."year" ORDER BY COUNT(DISTINCT "paper"."paperid") DESC