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28 lines
965 B
SQL
28 lines
965 B
SQL
create table users(
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id uuid primary key,
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name varchar(32) not null unique,
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password varchar(128)
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);
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create table accounts(
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id uuid primary key,
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"user" uuid not null references users(id),
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name varchar(32) not null,
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balance bigint not null default 0 constraint positive_balance check (balance >= 0),
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unique ("user", name)
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);
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create table transactions(
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id uuid primary key,
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"from" uuid not null references accounts(id),
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"to" uuid not null references accounts(id),
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amount bigint not null constraint positive_amount check (amount > 0),
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timestamp timestamp without time zone not null default now(),
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message text
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);
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create index transactions_from on transactions ("from");
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create index transactions_to on transactions ("to");
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create view transactions_with_user as select t.*, (select user from accounts where id = t.from) as from_user, (select user from accounts where id = t.to) as to_user from transactions t;
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