public Promise<O> get(UUID uuid) {
        Objects.requireNonNull(uuid, "uuid");

        return Schedulers.async().call(() -> {
            try (Connection c = sql.getConnection()) {
                try (PreparedStatement ps = c.prepareStatement(SELECT.replace("{table}", table))) {
                    ps.setString(1, uuid.toString());

                    try (ResultSet rs = ps.executeQuery()) {
                        if (rs.next()) {
                            return getOptional(rs, "value");
                        } else {
                            return emptyOptional();
                        }
                    }
                }
            }
        });
    }
Gets the {@code amount}.

@param uuid the uuid
@return the amount
helper-sql/src/main/java/me/lucko/helper/sql/util/Uuid2PosNumberTable.java