SELECT T1.title FROM movies AS T1 JOIN movietheaters AS T2 ON T1.code  =  T2.movie GROUP BY T1.title ORDER BY count(*) DESC LIMIT 1
Find the name of the movie that is played in the most number of theaters.
CREATE TABLE Movies (
  Code INTEGER PRIMARY KEY,
  Title VARCHAR(255) NOT NULL,
  Rating VARCHAR(255) 
);
CREATE TABLE MovieTheaters (
  Code INTEGER PRIMARY KEY,
  Name VARCHAR(255) NOT NULL,
  Movie INTEGER,  
    FOREIGN KEY (Movie) REFERENCES Movies(Code)
) ;
INSERT INTO Movies(Code,Title,Rating) VALUES(1,'Citizen Kane','PG') 
INSERT INTO MovieTheaters(Code,Name,Movie) VALUES(1,'Odeon',5)