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snowflake.snowpark.functions.last_day

snowflake.snowpark.functions.last_day(expr: Union[Column, str], part: Optional[Union[Column, str]] = None) → Column[source] (https://github.com/snowflakedb/snowpark-python/blob/v1.23.0/src/snowflake/snowpark/functions.py#L3407-L3435)

Returns the last day of the specified date part for a date or timestamp. Commonly used to return the last day of the month for a date or timestamp.

Parameters:

  • expr – The array column

  • part – The date part used to compute the last day of the given array column, default is “MONTH”. Valid values are “YEAR”, “MONTH”, “QUARTER”, “WEEK” or any of their supported variations.

Example:

>>> import datetime
>>> df = session.create_dataframe([
...     datetime.datetime.strptime("2020-05-01 13:11:20.000", "%Y-%m-%d %H:%M:%S.%f"),
...     datetime.datetime.strptime("2020-08-21 01:30:05.000", "%Y-%m-%d %H:%M:%S.%f")
... ], schema=["a"])
>>> df.select(last_day("a")).collect()
[Row(LAST_DAY("A")=datetime.date(2020, 5, 31)), Row(LAST_DAY("A")=datetime.date(2020, 8, 31))]
>>> df.select(last_day("a", "YEAR")).collect()
[Row(LAST_DAY("A", "YEAR")=datetime.date(2020, 12, 31)), Row(LAST_DAY("A", "YEAR")=datetime.date(2020, 12, 31))]
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