SELECT -- Incorrect table reservations
  Left.reservation,
  datetime (Left.reservation, Left.time_reserve) AS reserved_until,
  Right.reservation
from
  Bookings AS Left
  LEFT JOIN Bookings AS Right ON Left.id != Right.id
  AND Left.id_tables = Right.id_tables
WHERE
  datetime (Right.reservation) BETWEEN datetime (Left.reservation) AND datetime  (Left.reservation, Left.time_reserve)