last_day(date)

Описание

Функция last_day() возвращает последний день месяца для указанной даты или временной метки.

Параметры

• date: Column - столбец с датами или временными метками

Возвращаемое значение

Date - дата последнего дня месяца

Пример использования

from pyspark.sql.functions import last_day
from pyspark.sql import SparkSession
from datetime import datetime

# Создаем SparkSession
spark = SparkSession.builder.appName("last_day_example").getOrCreate()

# Создаем DataFrame с датами
data = [
    (datetime(2023, 1, 15),),   # январь
    (datetime(2023, 2, 10),),   # февраль
    (datetime(2023, 12, 1),)    # декабрь
]
df = spark.createDataFrame(data, ["date"])

# Получаем последний день месяца для каждой даты
result = df.select(
    "date",
    last_day("date").alias("last_day_of_month")
).show(truncate=False)

# Результат:
# +-------------------+-----------------+
# |date               |last_day_of_month|
# +-------------------+-----------------+
# |2023-01-15 00:00:00|2023-01-31       |
# |2023-02-10 00:00:00|2023-02-28       |
# |2023-12-01 00:00:00|2023-12-31       |
# +-------------------+-----------------+

Примечания

• NULL значения возвращают NULL
• Функция учитывает количество дней в месяце, включая високосные годы
• Для работы с датами также используйте:
• year() для извлечения года
• month() для извлечения месяца
• day() для извлечения дня
• hour() для извлечения часа
• minute() для извлечения минут
• second() для извлечения секунд
• quarter() для извлечения квартала
• dayofweek() для извлечения дня недели
• dayofyear() для извлечения дня года

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sketch functions

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агрегатные функции

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битовые операции

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оконные функции

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операторы сравнения

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функции для работы с битовыми картами

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функции преобразования типов

• to_decimal(col, scale=0)

функции шифрования

• aes_decrypt(col, key)