Data Engineer

Data Engineer

As a Data Engineer, I collect, extract and transform raw data in order to provide clean, reliable and usable data.

59 posts
PySpark - Replace Null Values in a DataFrame

PySpark - Replace Null Values in a DataFrame

Introduction In this tutorial, we want to replace null values in a PySpark DataFrame. In order to do this, we use the the fillna() method of PySpark. Import Libraries First, we import the following python modules: from pyspark.sql import SparkSession from pyspark.sql.functions import mean Create SparkSession Before...

PySpark - Remove Null Values from a DataFrame

PySpark - Remove Null Values from a DataFrame

Introduction In this tutorial, we want to drop rows with null values from a PySpark DataFrame. In order to do this, we use the the dropna() method of PySpark. Import Libraries First, we import the following python modules: from pyspark.sql import SparkSession Create SparkSession Before we can work with...

PySpark - Remove Duplicates from a DataFrame

PySpark - Remove Duplicates from a DataFrame

Introduction In this tutorial, we want to drop duplicates from a PySpark DataFrame. In order to do this, we use the the dropDuplicates() method of PySpark. Import Libraries First, we import the following python modules: from pyspark.sql import SparkSession Create SparkSession Before we can work with Pyspark, we need...

PySpark - Filter Rows from a DataFrame

PySpark - Filter Rows from a DataFrame

Introduction In this tutorial, we want to filter specific rows from a PySpark DataFrame based on specific conditions. In order to do this, we use the the filter() method of PySpark. Import Libraries First, we import the following python modules: from pyspark.sql import SparkSession Create SparkSession Before we can...

PySpark - Sort a DataFrame

PySpark - Sort a DataFrame

Introduction In this tutorial, we want to sort a PySpark DataFrame by specific columns. In order to do this, we use the the orderBy() method of PySpark. Import Libraries First, we import the following python modules: from pyspark.sql import SparkSession Create SparkSession Before we can work with Pyspark, we...

PySpark - Drop Columns from a DataFrame

PySpark - Drop Columns from a DataFrame

Introduction In this tutorial, we want to drop columns from a PySpark DataFrame. In order to do this, we use the the drop() method of PySpark. Import Libraries First, we import the following python modules: from pyspark.sql import SparkSession Create SparkSession Before we can work with Pyspark, we need...

PySpark - Add Columns to a DataFrame

PySpark - Add Columns to a DataFrame

Introduction In this tutorial, we want to add columns to a PySpark DataFrame. In order to do this, we use the the withColumn() method of PySpark. Import Libraries First, we import the following python modules: from pyspark.sql import SparkSession from pyspark.sql.functions import lit, col, sum, when from...

PySpark - Select Columns from a DataFrame

PySpark - Select Columns from a DataFrame

Introduction In this tutorial, we want to select specific columns from a PySpark DataFrame. In order to do this, we use the select() method of PySpark in different variants. Import Libraries First, we import the following python modules: from pyspark.sql import SparkSession from pyspark.sql.functions import col Create...

PySpark - Rename Columns of a DataFrame

PySpark - Rename Columns of a DataFrame

Introduction In this tutorial, we want to rename a PySpark DataFrame column. In order to do this, we use the the withColumnRenamed() method of PySpark. Import Libraries First, we import the following python modules: from pyspark.sql import SparkSession Create SparkSession Before we can work with Pyspark, we need to...

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