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

Which vocal type is the most frequently appearring type?
SELECT type FROM vocals GROUP BY type ORDER BY COUNT(*) DESC LIMIT 1
SELECT "type" FROM "vocals" GROUP BY "type" ORDER BY COUNT(*) DESC FETCH FIRST 1 ROWS ONLY