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July 9, 2019 15:42
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выбрать игру для пользователя с наибольшим количеством часов
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create database tmp_db1; | |
\c tmp_db1; | |
CREATE TABLE users ( | |
id integer, | |
email varchar(255) | |
); | |
CREATE TABLE stats ( | |
id integer, | |
hours integer, | |
date date, | |
game_id integer, | |
user_id integer | |
); | |
CREATE TABLE games ( | |
id integer, | |
title varchar(255) | |
); | |
INSERT into users (email) values ('foo@bar.com'), ('foo2@bar.com'); | |
INSERT into games (title) values ('game1'), ('game2'); | |
INSERT into stats(hours, date, game_id, user_id) values (3, '2018-09-11', 1, 1); | |
INSERT into stats(hours, date, game_id, user_id) values (13, '2018-09-11', 2, 2); | |
INSERT into stats(hours, date, game_id, user_id) values (1, '2018-09-12', 1, 1); | |
INSERT into stats(hours, date, game_id, user_id) values (5, '2018-09-12', 2, 2); | |
INSERT into stats(hours, date, game_id, user_id) values (8, '2018-09-13', 1, 1); | |
INSERT into stats(hours, date, game_id, user_id) values (6, '2018-09-13', 2, 2); | |
drop database tmp_db1; |
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