In this video we will solve a SQL interview question asked in Tredence Analytics . We will solve it using 3 methods.

High quality in depth Analytics courses : https://www.namastesql.com/

script:
CREATE TABLE cinema (
seat_id INT PRIMARY KEY,
free int
);
delete from cinema;
INSERT INTO cinema (seat_id, free) VALUES (1, 1);
INSERT INTO cinema (seat_id, free) VALUES (2, 0);
INSERT INTO cinema (seat_id, free) VALUES (3, 1);
INSERT INTO cinema (seat_id, free) VALUES (4, 1);
INSERT INTO cinema (seat_id, free) VALUES (5, 1);
INSERT INTO cinema (seat_id, free) VALUES (6, 0);
INSERT INTO cinema (seat_id, free) VALUES (7, 1);
INSERT INTO cinema (seat_id, free) VALUES (8, 1);
INSERT INTO cinema (seat_id, free) VALUES (9, 0);
INSERT INTO cinema (seat_id, free) VALUES (10, 1);
INSERT INTO cinema (seat_id, free) VALUES (11, 0);
INSERT INTO cinema (seat_id, free) VALUES (12, 1);
INSERT INTO cinema (seat_id, free) VALUES (13, 0);
INSERT INTO cinema (seat_id, free) VALUES (14, 1);
INSERT INTO cinema (seat_id, free) VALUES (15, 1);
INSERT INTO cinema (seat_id, free) VALUES (16, 0);
INSERT INTO cinema (seat_id, free) VALUES (17, 1);
INSERT INTO cinema (seat_id, free) VALUES (18, 1);
INSERT INTO cinema (seat_id, free) VALUES (19, 1);
INSERT INTO cinema (seat_id, free) VALUES (20, 1);


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