Spark - load CSV file as DataFrame? Loading CSV Files into Spark Data Frames A Simple Guide Spark is a powerful framework for large scale data processing and its ability to handle CSV files seamle 2 min read 07-10-2024 8
Spark write Parquet to S3 the last task takes forever Spark Write to S3 Why Your Last Parquet Task Stalls Writing large datasets to S3 using Sparks Parquet format can be efficient but sometimes you ll encounter a f 3 min read 07-10-2024 5
Spark SQL Row_number() PartitionBy Sort Desc Mastering Row Numbering in Spark SQL Partition By Sort and Descending Order Spark SQLs row number function is a powerful tool for assigning unique sequential nu 2 min read 07-10-2024 6
Filtering rows based on column values in Spark dataframe Scala Filtering Rows in Spark Data Frames A Comprehensive Guide Scala Spark Data Frames are incredibly powerful tools for data manipulation and analysis One common ta 2 min read 07-10-2024 7
An error occurred while calling z:org.apache.spark.api.python.PythonRDD.collectAndServe Unpacking the Error Occurred While Calling z org apache spark api python Python RDD collect And Serve Error in Apache Spark The error An error occurred while ca 3 min read 07-10-2024 5
Concatenate two PySpark dataframes Concatenating Py Spark Data Frames A Comprehensive Guide Py Spark the Python API for Apache Spark is a powerful tool for large scale data processing One common 2 min read 07-10-2024 8
What do columns ‘rawPrediction’ and ‘probability’ of DataFrame mean in Spark MLlib？ Demystifying Spark M Llibs raw Prediction and probability Columns Spark M Llib a powerful library for machine learning in Spark offers a range of algorithms for 2 min read 07-10-2024 5
PySpark: compute row maximum of the subset of columns and add to an exisiting dataframe Boosting Data Analysis with Py Spark Efficiently Calculating Row Maximums for Subsets of Columns In data analysis often we need to quickly compute statistics fo 2 min read 07-10-2024 6
Including null values in an Apache Spark Join Mastering Null Values in Apache Spark Joins A Comprehensive Guide Joins are a fundamental operation in data analysis allowing you to combine data from multiple 3 min read 07-10-2024 10
String encoding issue in Spark SQL/DataFrame Unraveling the Mystery of String Encoding in Spark SQL Data Frame Have you ever encountered unexpected characters or garbled text when working with strings in y 2 min read 07-10-2024 14
Unable to append "Quotes" in write for dataframe Conquering the Quotes Quandary Appending Strings to Pandas Data Frames The Problem You re trying to add strings containing quotes single or double to your Panda 2 min read 07-10-2024 11
calculating percentages on a pyspark dataframe Calculating Percentages in a Pyspark Data Frame A Comprehensive Guide Spark is a powerful framework for distributed data processing and Pyspark provides a Pytho 2 min read 07-10-2024 12
Meaning of Exchange in Spark Stage Unpacking the Exchange in Spark Stages Understanding Data Movement In the world of Apache Spark understanding the exchange operation within a Spark stage is cru 2 min read 06-10-2024 6
spark dataframe sum of column based on condition Summing Up How to Calculate Conditional Sums in Spark Data Frames Spark Data Frames provide a powerful and efficient way to work with large datasets But sometim 2 min read 06-10-2024 11
How to fix 22: error: not found: value SparkSession in Scala? Conquering the Error not found value Spark Session in Scala The Problem Have you ever encountered the frustrating error not found value Spark Session while work 2 min read 06-10-2024 8
Spark: get distinct in each partition Spark Getting Distinct Values in Each Partition When working with large datasets in Spark efficiently handling data within partitions is crucial Sometimes you n 2 min read 06-10-2024 10
How to connect Spark SQL to remote Hive metastore (via thrift protocol) with no hive-site.xml? How to Connect Spark SQL to Remote Hive Metastore via Thrift Protocol Without hive site xml In modern data engineering Apache Spark has emerged as a leading big 3 min read 06-10-2024 8
error in initSerDe : java.lang.ClassNotFoundException class org.apache.hive.hcatalog.data.JsonSerDe not found java lang Class Not Found Exception org apache hive hcatalog data Json Ser De not found Decoding the Hive JSON Ser De Error This error message often pops up whe 3 min read 06-10-2024 10
How to calculate the size of dataframe in bytes in Spark? Calculating the Size of Your Spark Data Frame in Bytes Understanding the size of your data is crucial for efficient data processing and resource management in S 2 min read 06-10-2024 9
Removing NULL items from PySpark arrays Cleaning Up Your Data Removing NULL Items from Py Spark Arrays Data cleaning is a crucial part of any data analysis workflow One common challenge is dealing wit 2 min read 06-10-2024 13
pyspark pivot without aggregation Pivoting Data in Py Spark Without Aggregation A Comprehensive Guide Pivoting data is a common task in data analysis transforming your data from a row oriented f 2 min read 06-10-2024 13
How to write data to Apache Iceberg tables using Spark SQL? Writing Data to Apache Iceberg Tables Using Spark SQL Apache Iceberg is a popular open source table format designed for efficient and scalable data management i 2 min read 06-10-2024 11
Spark 3.0 - Read data from an MQTT steam Spark 3 0 Consuming Data from MQTT Streams The world is awash in data and a significant portion of it flows through real time streams One popular protocol for s 3 min read 06-10-2024 11
Data frame casting not throwing overflow exception and produces null Understanding Data Frame Casting and Null Values Why Overflow Exceptions Dont Always Surface The Problem Imagine this scenario you have a data frame containing less than a minute read 05-10-2024 12
convert few fields of a nested json to a dictionary in Pyspark Extracting Nested JSON Fields into Dictionaries in Py Spark Problem You have a dataset stored in a Py Spark Data Frame with nested JSON structures You need to e 2 min read 05-10-2024 8