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create table film_screenings ( id serial primary key, screening_time tstzrange, -- дата и время начала сеанса constraint no_screening_time_overlap exclude using gist ( screening_time WITH && -- check for overlapping ranges ) ); insert into film_screenings (screening_time) values ('["2023-01-01 19:00:00", "2023-01-01 20:45:00"]');

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