What is the difference in months between two given timestamps, even if the day and time don't exactly match, as long as the calendar month has increased and the calendar day and time are equal to or greater than the start?
To find the difference in months between two given timestamps, you can use the `datediff(MONTH, start, end)` function. This function counts whole elapsed months based on UTC, considering one month as elapsed when the calendar month has increased and the calendar day and time are equal to or greater than the start.

Here's an example:

```sql
SELECT datediff(MONTH, TIMESTAMP'2021-02-28 12:00:00', TIMESTAMP'2021-03-28 11:59:59');
```

In this example, the result is `0` because even though the calendar month has increased, the day and time are not yet equal to or greater than the start. However, if we adjust the end timestamp to be `2021-03-28 12:00:00`, the result will be `1`, indicating that one month has passed.

Keep in mind that the `datediff` function counts whole elapsed units, so if the end timestamp is before the start timestamp, the result will be negative.