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Showing posts with the label Apache Spark Sql

Add Column To Pyspark Dataframe Based On A Condition

My data.csv file has three columns like given below. I have converted this file to python spark dat… Read more Add Column To Pyspark Dataframe Based On A Condition

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

Pyspark - Append Previous And Next Row To Current Row

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

How To Make An Integer Index Row?

I have a DataFrame: +-----+--------+---------+ | usn|log_type|item_code| +-----+--------+--------… Read more How To Make An Integer Index Row?

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

In Pyspark Is There Any Way To Dynamically Register Udf Using Functions Of Python Class Given At Run Time?

I am new to Python, so apologizing if there is any mistake in my approach I have a scenario where c… Read more In Pyspark Is There Any Way To Dynamically Register Udf Using Functions Of Python Class Given At Run Time?

Can I Change The Nullability Of A Column In My Spark Dataframe?

I have a StructField in a dataframe that is not nullable. Simple example: import pyspark.sql.functi… Read more Can I Change The Nullability Of A Column In My Spark Dataframe?

Probnorm Function Equivalent In Pyspark

PROBNORM : explanation The PROBNORM function in SAS returns the probability that an observation fro… Read more Probnorm Function Equivalent In Pyspark

Convert Pyspark Dataframe Column From List To String

I have this PySpark dataframe +-----------+--------------------+ |uuid | test_123 |… Read more Convert Pyspark Dataframe Column From List To String

Pyspark: Select Part Of The String(file Path) Column Values

Pyspark: Split and select part of the string column values How can I select the characters or file … Read more Pyspark: Select Part Of The String(file Path) Column Values

Choosing Random Items From A Spark Groupeddata Object

I'm new to using Spark in Python and have been unable to solve this problem: After running grou… Read more Choosing Random Items From A Spark Groupeddata Object

Pyspark Crossjoin Between 2 Dataframes With Millions Of Records

I have 2 dataframes A(35 Million records) and B(30000 records) A |Text | ------- | pqr | ------- |… Read more Pyspark Crossjoin Between 2 Dataframes With Millions Of Records

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

How To Convert Date To The First Day Of Month In A Pyspark Dataframe Column?

I have the following DataFrame: +----------+ | date| +----------+ |2017-01-25| |2017-01-21| |… Read more How To Convert Date To The First Day Of Month In A Pyspark Dataframe Column?

Pyspark Hive Context -- Read Table With UTF-8 Encoding

I have a table in hive, And I am reading that table in pyspark df_sprk_df from pyspark import Spark… Read more Pyspark Hive Context -- Read Table With UTF-8 Encoding