如何在 PySpark 数据框中找到特定列的和
原文:https://www . geesforgeks . org/如何找到 pyspark-dataframe 中特定列的总和/
在本文中,我们将在 Python 中找到 PySpark 数据框列的总和。我们将使用 agg()函数找到列中的和。
让我们创建一个示例数据帧。
Python 3
# importing module
import pyspark
# importing sparksession from pyspark.sql module
from pyspark.sql import SparkSession
# creating sparksession and giving an app name
spark = SparkSession.builder.appName('sparkdf').getOrCreate()
# list of students data
data = [["1", "sravan", "vignan", 67, 89],
["2", "ojaswi", "vvit", 78, 89],
["3", "rohith", "vvit", 100, 80],
["4", "sridevi", "vignan", 78, 80],
["1", "sravan", "vignan", 89, 98],
["5", "gnanesh", "iit", 94, 98]]
# specify column names
columns = ['student ID', 'student NAME', 'college',
'subject 1', 'subject 2']
# creating a dataframe from the lists of data
dataframe = spark.createDataFrame(data, columns)
# display dataframe
dataframe.show()
版权属于:月萌API www.moonapi.com,转载请注明出处