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@@ -296,12 +296,86 @@ create table book_json(
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)
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);
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+-- -----------------------------------------------------------------
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+-- 11.33 Изменение структуры таблиц
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+
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+-- Добавить ограничение на таблицу
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+alter table book_json add check (
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+ data->>'name' is not null and
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+ data->>'pages' is not null and
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+ (data->>'pages')::int > 0
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+);
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+
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+-- Добавить колонку к таблице
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+alter table book_json
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+add column created_at timestamp not null default current_timestamp;
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+
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+alter table book_json
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+add column created_at timestamp not null default now();
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+
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+-- -----------------------------------------------------------------
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+-- 11.38 INNER JOIN
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+
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+table species;
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+table genus;
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+
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+select species_name as вид, genus_name as род from species
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+join genus using(genus_id)
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+order by species_name;
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+
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+-- Другие условия
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+select species_name вид, genus_name род
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+from species s join genus g on s.genus = g.genus_id
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+order by species_name;
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+--
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+drop table if exists client, payment cascade;
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+
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+create temp table client (
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+ client_id bigint generated always as identity primary key,
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+ email varchar(360) not null
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+);
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+create temp table payment (
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+ payment_id bigint generated always as identity primary key,
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+ payment_time timestamp not null default current_timestamp,
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+ amount int not null check (amount > 0),
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+ client_id bigint not null references client(client_id)
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+);
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+
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+insert into client (email) values
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+ ('client1@mail.ru'),
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+ ('client2@mail.ru'),
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+ ('client3@mail.ru');
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+insert into payment (payment_time, amount, client_id) values
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+ ((now() - '1 month'::interval), 10, 1),
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+ ((now() - '2 month'::interval), 11, 2),
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+ ((now() - '3 month'::interval), 12, 3);
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+table client;
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+table payment;
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+select email from client
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+join payment using(client_id)
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+where payment_time::date + interval '1 month' = current_date
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+order by email
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+-- -----------------------------------------------------------------
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+-- 11.39 LEFT И RIGHT OUTER JOIN
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+
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+table species;
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+table genus;
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+
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+select species_name вид, genus_name род
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+from species s left join genus g using(genus_id)
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+order by species_name;
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+
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+-- -----------------------------------------------------------------
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+-- 11.40 FULL OUTER JOIN
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+select species_name вид, genus_name род
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+from species s full join genus g using(genus_id)
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+order by species_name;
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unknown