CREATE TABLE keyword (keyword VARCHAR, kid INT)
CREATE TABLE domain (did INT, name VARCHAR)
CREATE TABLE domain_keyword (did INT, kid INT)
CREATE TABLE journal (homepage VARCHAR, jid INT, name VARCHAR)
CREATE TABLE cite (cited INT, citing INT)
CREATE TABLE domain_conference (cid INT, did INT)
CREATE TABLE author (aid INT, homepage VARCHAR, name VARCHAR, oid INT)
CREATE TABLE domain_journal (did INT, jid INT)
CREATE TABLE conference (cid INT, homepage VARCHAR, name VARCHAR)
CREATE TABLE publication (abstract VARCHAR, cid INT, citation_num INT, jid INT, pid INT, reference_num INT, title VARCHAR, year INT)
CREATE TABLE domain_author (aid INT, did INT)
CREATE TABLE organization (continent VARCHAR, homepage VARCHAR, name VARCHAR, oid INT)
CREATE TABLE publication_keyword (kid INT, pid INT)
CREATE TABLE writes (aid INT, pid INT)
CREATE TABLE domain_publication (did INT, pid INT)

return me the papers on VLDB conference after 2000 .
SELECT publication.title FROM conference, publication WHERE conference.name = 'VLDB' AND publication.cid = conference.cid AND publication.year > 2000
SELECT "publication"."title" FROM "conference" JOIN "publication" ON "conference"."cid" = "publication"."cid" AND "publication"."year" > 2000 WHERE "conference"."name" = 'VLDB'