List all singer names in concerts in year 2014.
CREATE TABLE singer_in_concert (singer_id VARCHAR, concert_id VARCHAR); CREATE TABLE concert (concert_id VARCHAR, year VARCHAR); CREATE TABLE singer (name VARCHAR, singer_id VARCHAR)
[SQL] SELECT T2.name FROM singer_in_concert AS T1 JOIN singer AS T2 ON T1.singer_id = T2.singer_id JOIN concert AS T3 ON T1.concert_id = T3.concert_id WHERE T3.year = 2014 [/SQL]