Buffers

SELECT
    number AS num,
    number * number AS num_square
FROM numbers(10)
INTO OUTFILE 'squares.buffers'
FORMAT Buffers;

SELECT
    *
FROM file(
    'squares.buffers',
    'Buffers',
    'col_1 UInt64, col_2 UInt64'
);

  ┌─col_1─┬─col_2─┐
  │     0 │     0 │
  │     1 │     1 │
  │     2 │     4 │
  │     3 │     9 │
  │     4 │    16 │
  │     5 │    25 │
  │     6 │    36 │
  │     7 │    49 │
  │     8 │    64 │
  │     9 │    81 │
  └───────┴───────┘

CREATE TABLE number_squares
(
    a UInt64,
    b UInt64
) ENGINE = Memory;

INSERT INTO number_squares
FROM INFILE 'squares.buffers'
FORMAT Buffers;

SELECT * FROM number_squares;

  ┌─a─┬──b─┐
  │ 0 │  0 │
  │ 1 │  1 │
  │ 2 │  4 │
  │ 3 │  9 │
  │ 4 │ 16 │
  │ 5 │ 25 │
  │ 6 │ 36 │
  │ 7 │ 49 │
  │ 8 │ 64 │
  │ 9 │ 81 │
  └───┴────┘