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Showing posts with the label Apache Spark Sql
Removing Duplicate Columns After A Df Join In Spark

Removing Duplicate Columns After A Df Join In Spark

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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
Improve Parallelism In Spark Sql

Improve Parallelism In Spark Sql

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I have the below code. I am using pyspark 1.2.1 with python 2.7 (cpython) for colname in shuffle_co… Read more Improve Parallelism In Spark Sql
Selecting Empty Array Values From A Spark Dataframe

Selecting Empty Array Values From A Spark Dataframe

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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
Spark: How To Transpose And Explode Columns With Nested Arrays

Spark: How To Transpose And Explode Columns With Nested Arrays

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I applied an algorithm from the question below(in NOTE) to transpose and explode nested spark dataf… Read more Spark: How To Transpose And Explode Columns With Nested Arrays
Pyspark - Append Previous And Next Row To Current Row

Pyspark - Append Previous And Next Row To Current Row

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Let's say I have a PySpark data frame like so: 1 0 1 0 0 0 1 1 0 1 0 1 How can I append the la… Read more Pyspark - Append Previous And Next Row To Current Row
Implementing A Recursive Algorithm In Pyspark To Find Pairings Within A Dataframe

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

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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