CREATE TABLE test(i INTEGER, j INTEGER, t TIMESTAMP TIME INDEX);

Affected Rows: 0

INSERT INTO test VALUES (1, 1, 1), (NULL, 1, 2), (1, NULL, 3);

Affected Rows: 3

SELECT * FROM test ORDER BY i NULLS FIRST, j NULLS LAST;

+---+---+-------------------------+
| i | j | t                       |
+---+---+-------------------------+
|   | 1 | 1970-01-01T00:00:00.002 |
| 1 | 1 | 1970-01-01T00:00:00.001 |
| 1 |   | 1970-01-01T00:00:00.003 |
+---+---+-------------------------+

SELECT * FROM test ORDER BY i NULLS FIRST, j NULLS FIRST;

+---+---+-------------------------+
| i | j | t                       |
+---+---+-------------------------+
|   | 1 | 1970-01-01T00:00:00.002 |
| 1 |   | 1970-01-01T00:00:00.003 |
| 1 | 1 | 1970-01-01T00:00:00.001 |
+---+---+-------------------------+

SELECT * FROM test ORDER BY i NULLS LAST, j NULLS FIRST;

+---+---+-------------------------+
| i | j | t                       |
+---+---+-------------------------+
| 1 |   | 1970-01-01T00:00:00.003 |
| 1 | 1 | 1970-01-01T00:00:00.001 |
|   | 1 | 1970-01-01T00:00:00.002 |
+---+---+-------------------------+

SELECT i, j, row_number() OVER (PARTITION BY i ORDER BY j NULLS FIRST) FROM test ORDER BY i NULLS FIRST, j NULLS FIRST;

+---+---+------------------------------------------------------------------------------------------------------------------------+
| i | j | ROW_NUMBER() PARTITION BY [test.i] ORDER BY [test.j ASC NULLS FIRST] RANGE BETWEEN UNBOUNDED PRECEDING AND CURRENT ROW |
+---+---+------------------------------------------------------------------------------------------------------------------------+
|   | 1 | 1                                                                                                                      |
| 1 |   | 1                                                                                                                      |
| 1 | 1 | 2                                                                                                                      |
+---+---+------------------------------------------------------------------------------------------------------------------------+

SELECT i, j, row_number() OVER (PARTITION BY i ORDER BY j NULLS LAST) FROM test ORDER BY i NULLS FIRST, j NULLS FIRST;

+---+---+-----------------------------------------------------------------------------------------------------------------------+
| i | j | ROW_NUMBER() PARTITION BY [test.i] ORDER BY [test.j ASC NULLS LAST] RANGE BETWEEN UNBOUNDED PRECEDING AND CURRENT ROW |
+---+---+-----------------------------------------------------------------------------------------------------------------------+
|   | 1 | 1                                                                                                                     |
| 1 |   | 2                                                                                                                     |
| 1 | 1 | 1                                                                                                                     |
+---+---+-----------------------------------------------------------------------------------------------------------------------+

SELECT * FROM test ORDER BY i NULLS FIRST, j NULLS LAST LIMIT 2;

+---+---+-------------------------+
| i | j | t                       |
+---+---+-------------------------+
|   | 1 | 1970-01-01T00:00:00.002 |
| 1 | 1 | 1970-01-01T00:00:00.001 |
+---+---+-------------------------+

SELECT * FROM test ORDER BY i NULLS LAST, j NULLS LAST LIMIT 2;

+---+---+-------------------------+
| i | j | t                       |
+---+---+-------------------------+
| 1 | 1 | 1970-01-01T00:00:00.001 |
| 1 |   | 1970-01-01T00:00:00.003 |
+---+---+-------------------------+

SELECT * FROM test ORDER BY i;

+---+---+-------------------------+
| i | j | t                       |
+---+---+-------------------------+
| 1 | 1 | 1970-01-01T00:00:00.001 |
| 1 |   | 1970-01-01T00:00:00.003 |
|   | 1 | 1970-01-01T00:00:00.002 |
+---+---+-------------------------+

SELECT * FROM test ORDER BY i NULLS FIRST;

+---+---+-------------------------+
| i | j | t                       |
+---+---+-------------------------+
|   | 1 | 1970-01-01T00:00:00.002 |
| 1 | 1 | 1970-01-01T00:00:00.001 |
| 1 |   | 1970-01-01T00:00:00.003 |
+---+---+-------------------------+

SELECT * FROM test ORDER BY i NULLS LAST;

+---+---+-------------------------+
| i | j | t                       |
+---+---+-------------------------+
| 1 | 1 | 1970-01-01T00:00:00.001 |
| 1 |   | 1970-01-01T00:00:00.003 |
|   | 1 | 1970-01-01T00:00:00.002 |
+---+---+-------------------------+

DROP TABLE test;

Affected Rows: 0