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Showing posts with the label Apache Spark Sql

How To Read Csv File With Additional Comma In Quotes Using Pyspark?

I am having some troubles reading the following CSV data in UTF-16: FullName, FullLabel, Type TEST.… Read more How To Read Csv File With Additional Comma In Quotes Using Pyspark?

How To Use Scala Udf In Pyspark?

I want to be able to use a Scala function as a UDF in PySpark package com.test object ScalaPySpark… Read more How To Use Scala Udf In Pyspark?

Read A File In Pyspark With Custom Column And Record Delmiter

Is there any way to use custom record delimiters while reading a csv file in pyspark. In my file re… Read more Read A File In Pyspark With Custom Column And Record Delmiter

Efficient Column Processing In Pyspark

I have a dataframe with a very large number of columns (>30000). I'm filling it with 1 and 0… Read more Efficient Column Processing In Pyspark

Selecting Empty Array Values From A Spark Dataframe

Given a DataFrame with the following rows: rows = [ Row(col1='abc', col2=[8], col3=[18]… Read more Selecting Empty Array Values From A Spark Dataframe

How To Serialize Pyspark Groupeddata Object?

I am running a groupBy() on a dataset having several millions of records and want to save the resul… Read more How To Serialize Pyspark Groupeddata Object?

Read Json File As Pyspark Dataframe Using Pyspark?

How can I read the following JSON structure to spark dataframe using PySpark? My JSON structure {&#… Read more Read Json File As Pyspark Dataframe Using Pyspark?

Get 20th To 80th Percentile Of Each Group - Pyspark

I have three columns in a pyspark data frame ( sample data given below ) I wanted to get the remov… Read more Get 20th To 80th Percentile Of Each Group - Pyspark

Joining Dataframes With Same Coumn Name In Pyspark

I have two dataframe which has been readed from two csv files. +---+----------+-----------------+ |… Read more Joining Dataframes With Same Coumn Name In Pyspark

Removing Duplicate Columns After A Df Join In Spark

When you join two DFs with similar column names: df = df1.join(df2, df1['id'] == df2['i… Read more Removing Duplicate Columns After A Df Join In Spark

Implementing A Recursive Algorithm In Pyspark To Find Pairings Within A Dataframe

I have a spark dataframe (prof_student_df) that lists student/professor pair for a timestamp. There… Read more Implementing A Recursive Algorithm In Pyspark To Find Pairings Within A Dataframe

Spark: How To Parse Json String Of Nested Lists To Spark Data Frame?

How to parse JSON string of nested lists to spark data frame in pyspark ? Input data frame: +------… Read more Spark: How To Parse Json String Of Nested Lists To Spark Data Frame?

How To Read Parquet Files Under A Directory Using Pyspark?

I have searched online and the solutions provided online didn't resolve my issue. I am trying t… Read more How To Read Parquet Files Under A Directory Using Pyspark?

Spark - Set Null When Column Not Exist In Dataframe

I'm loading many versions of JSON files to spark DataFrame. some of the files holds columns A,B… Read more Spark - Set Null When Column Not Exist In Dataframe

How To Create A Z-score In Spark Sql For Each Group

I have a dataframe which looks like this dSc TranAmount 1: 100021 79.64 2: 1000… Read more How To Create A Z-score In Spark Sql For Each Group

Issue With Df.show() In Pyspark

I have the following code: import pyspark import pandas as pd from pyspark.sql import SQLContext f… Read more Issue With Df.show() In Pyspark

Pyspark, Compare Two Rows In Dataframe

I'm attempting to compare one row in a dataframe with the next to see the difference in timesta… Read more Pyspark, Compare Two Rows In Dataframe

Mode Of Row As A New Column In Pyspark Dataframe

Is it possible to add a new column based on the maximum of previous columns where the previous colu… Read more Mode Of Row As A New Column In Pyspark Dataframe

How To Get 1000 Records From Dataframe And Write Into A File Using Pyspark?

I am having 100,000+ of records in dataframe. I want to create a file dynamically and push 1000 rec… Read more How To Get 1000 Records From Dataframe And Write Into A File Using Pyspark?

Pyspark Dataframes - Filtering Using Comparisons Between Columns Of Different Types

Suppose you have a dataframe with columns of various types (string, double...) and a special value … Read more Pyspark Dataframes - Filtering Using Comparisons Between Columns Of Different Types