CREATE TABLE albums (aid NUMBER, title CLOB, year NUMBER, label CLOB, type CLOB)
CREATE TABLE songs (songid NUMBER, title CLOB)
CREATE TABLE vocals (songid NUMBER, bandmate NUMBER, type CLOB)
CREATE TABLE tracklists (albumid NUMBER, position NUMBER, songid NUMBER)
CREATE TABLE performance (songid NUMBER, bandmate NUMBER, stageposition CLOB)
CREATE TABLE band (id NUMBER, firstname CLOB, lastname CLOB)
CREATE TABLE instruments (songid NUMBER, bandmateid NUMBER, instrument CLOB)

Which song has the most vocals?
SELECT title FROM vocals AS T1 JOIN songs AS T2 ON T1.songid = T2.songid GROUP BY T1.songid ORDER BY COUNT(*) DESC LIMIT 1
SELECT "title" FROM "vocals" "T1" JOIN "songs" "T2" ON "T1"."songid" = "T2"."songid" GROUP BY "T1"."songid" ORDER BY COUNT(*) DESC FETCH FIRST 1 ROWS ONLY