Welcome to Kontext!

Join our community for cloud, data and IT professionals.

account_circle

Account

Register an account to publish articles on Kontext and to enjoy the full features of Kontext.

person_add Register account_circle Log in
email

Subscription

Subscribe to Kontext newsletter to get updates about data analytics, programming and cloud related articles.

forum

Kontext forum

Do you have a question about data, programming and cloud? Ask it on our forums.

Go to forums
calendar booking feature

view_columnKontext Column

Want to publish data, programming and cloud related articles? Follow three steps to create your columns.

Learn more arrow_forward

descriptionArticles

Kontext Newsletter #10 (2021-10-21)
Kontext Newsletter #10 (2021-10-21)
more_vert
#kontext-newsletter
visibility 8
thumb_up 0
access_time 1d
open_in_new Kontext Information
Read Email from Microsoft 365 via Microsoft Graph API
Read Email from Microsoft 365 via Microsoft Graph API
more_vert
#python #Azure #micrsoft-graph
visibility 12
thumb_up 0
access_time 4d
open_in_new Python Programming
Spark SQL - PERCENT_RANK Window Function
more_vert
#spark-sql-function #spark-sql
visibility 9
thumb_up 0
access_time 4d
open_in_new Spark
Spark - Read and Write Data with MongoDB
Spark - Read and Write Data with MongoDB
more_vert
#spark #pyspark #mongodb
visibility 17
thumb_up 0
access_time 7d
open_in_new Spark
forumAzure Functions Error - 'System.OutOfMemoryException' was thrown
more_vert
#azure-functions #Azure #.NET
visibility 4
thumb_up 0
access_time 7d
open_in_new Cloud Computing Forum
forumAPPLICATIONINSIGHTS_CONNECTION_STRING or APPINSIGHTS_INSTRUMENTATIONKEY is defined but the Application Insights Extension is not installed
more_vert
#azure-functions #Azure #.NET
visibility 4
thumb_up 0
access_time 7d
open_in_new Cloud Computing Forum
Kontext Newsletter #9 (2021-10-14)
Kontext Newsletter #9 (2021-10-14)
more_vert
#kontext-newsletter
visibility 13
thumb_up 0
access_time 9d
open_in_new Kontext Information
Spark Dataset and DataFrame
more_vert
#spark #scala
visibility 15
thumb_up 0
access_time 9d
open_in_new Spark
Spark - Date Difference in Seconds, Minutes, Hours
more_vert
#spark-sql #spark-sql-function #pyspark
visibility 21
thumb_up 0
access_time 10d
open_in_new Spark
Install Hadoop 3.3.1 on Windows 10 Step by Step Guide
Install Hadoop 3.3.1 on Windows 10 Step by Step Guide
more_vert
#windows10 #hadoop #yarn #hdfs #big-data-on-windows-10
visibility 62
thumb_up 0
access_time 5d
open_in_new Hadoop
Kontext Newsletter #8 (2021-10-08)
Kontext Newsletter #8 (2021-10-08)
more_vert
#kontext-newsletter
visibility 12
thumb_up 0
access_time 14d
open_in_new Kontext Information
Kontext Newsletter #7 (2021-10-03) - Hadoop, Hive, JDBC, SQL Server, BigQuery, MySQL, .NET 5
Kontext Newsletter #7 (2021-10-03) - Hadoop, Hive, JDBC, SQL Server, BigQuery, MySQL, .NET 5
more_vert
#kontext-newsletter
visibility 12
thumb_up 0
access_time 19d
open_in_new Kontext Information
forumHow to fetch data from Teradata database?
more_vert
#teradata
visibility 29
thumb_up 1
access_time 23d
open_in_new Developer General Forum
Hadoop 3.3.1 winutils
more_vert
#hadoop #windows10
visibility 216
thumb_up 0
access_time 25d
open_in_new Hadoop
forumVMware - VMware Player does not support nested virtualization on this host.
more_vert
visibility 11
thumb_up 0
access_time 25d
open_in_new Developer General Forum
Install Hadoop 3.2.1 on Windows 10 Step by Step Guide
Install Hadoop 3.2.1 on Windows 10 Step by Step Guide
more_vert
#windows10 #hadoop #yarn #big-data-on-windows-10
visibility 60,222
thumb_up 30
access_time 11m
open_in_new Hadoop
Data Partitioning in Spark (PySpark) In-depth Walkthrough
more_vert
#python #spark #pyspark #spark-advanced
visibility 101,245
thumb_up 21
access_time 11m
open_in_new Spark
Spark - Save DataFrame to Hive Table
more_vert
#python #spark #pyspark #hive #spark-database-connect
visibility 50,963
thumb_up 7
access_time 11m
open_in_new Spark
Connect to SQL Server in Spark (PySpark)
more_vert
#SQL Server #python #spark #pyspark #spark-database-connect
visibility 44,611
thumb_up 5
access_time 10m
open_in_new Spark
Convert Python Dictionary List to PySpark DataFrame
more_vert
#pyspark #spark-2-x #spark #python #spark-dataframe
visibility 30,643
thumb_up 1
access_time 11m
open_in_new Spark
Install Open JDK on WSL
more_vert
#Java #WSL
visibility 8,357
thumb_up 3
access_time 9m
open_in_new Java Programming
PySpark: Convert Python Array/List to Spark Data Frame
more_vert
#python #spark #pyspark #spark-dataframe
visibility 59,014
thumb_up 1
access_time 2y
open_in_new Spark
Save DataFrame to SQL Databases via JDBC in PySpark
more_vert
#pyspark #spark-2-x #teradata #SQL Server #spark-database-connect
visibility 23,323
thumb_up 1
access_time 2y
open_in_new Spark
Pandas DataFrame Plot - Pie Chart
Pandas DataFrame Plot - Pie Chart
more_vert
#plot #pandas #jupyter-notebook #python #pandas-plot
visibility 30,752
thumb_up 7
access_time 10m
open_in_new Code Snippets & Tips
PySpark: Convert JSON String Column to Array of Object (StructType) in Data Frame
more_vert
#python #spark #spark-dataframe
visibility 54,252
thumb_up 3
access_time 10m
open_in_new Spark
Install Windows Subsystem for Linux on a Non-System Drive
more_vert
#linux #WSL #ubuntu #big-data-on-wsl
visibility 32,916
thumb_up 21
access_time 2y
open_in_new Tools
Save DataFrame as CSV File in Spark
more_vert
#pyspark #spark #spark-2-x #spark-file-operations
visibility 41,548
thumb_up 1
access_time 2y
open_in_new Spark
Convert TimeStamp to Date in Teradata
more_vert
#teradata #SQL
visibility 10,943
thumb_up 0
access_time 2y
open_in_new Teradata
Get IP Address in ASP.NET Core 5
more_vert
#asp.net core #C# #.NET
visibility 4,342
thumb_up 1
access_time 9m
open_in_new ASP.NET Core
Filter Spark DataFrame Columns with None or Null Values
more_vert
#spark #pyspark #how-to #tutorial #spark-dataframe
visibility 30,508
thumb_up 2
access_time 11m
open_in_new Spark


view_columnFeatured columns

Raymond Raymond
account_circle Profile

Spark

more_vert
rss_feed Subscribe RSS

Apache Spark installation guides, performance tuning tips, general tutorials, etc.

*Spark logo is a registered trademark of Apache Spark.

Raymond Raymond
account_circle Profile

Code Snippets & Tips

more_vert
rss_feed Subscribe RSS

Code snippets and tips for various programming languages/frameworks. All code examples are under MIT or Apache 2.0 license unless specified. 

Raymond Raymond
account_circle Profile

Hadoop

more_vert
rss_feed Subscribe RSS

Articles about Apache Hadoop installation, performance tuning and general tutorials.

*The yellow elephant logo is a registered trademark of Apache Hadoop.

Raymond Raymond
account_circle Profile

Teradata

more_vert
rss_feed Subscribe RSS

Tutorials and information about Teradata.

Raymond Raymond
account_circle Profile

ASP.NET Core

more_vert
rss_feed Subscribe RSS

Articles about ASP.NET Core 1.x, 2.x, 3.x and 5.0.

Raymond Raymond
account_circle Profile

GCP

more_vert
rss_feed Subscribe RSS

Data analytics with Google Cloud Platform. For BigQuery SQL mentioned in the articles, they are all using standard SQL dialect unless specified differently. 

Raymond Raymond
account_circle Profile

Java Programming

more_vert
rss_feed Subscribe RSS

Java Programming related.

Raymond Raymond
account_circle Profile

.NET

more_vert
rss_feed Subscribe RSS

Everything about .NET framework, .NET Core, .NET Standard, .NET 5 and .NET 6. 

Raymond Raymond
account_circle Profile

Tools

more_vert
rss_feed Subscribe RSS

Tools, Frameworks installation guide and usage tutorials. 

Raymond Raymond
account_circle Profile

Azure

more_vert
rss_feed Subscribe RSS

Data analytics, application development with Microsoft Azure cloud platform.

local_offerSeries

See all
Plotting with Pandas DataFrame

Plotting with Pandas DataFrame

Plotting chats with Pandas DataFrame. You can easily plot these charts: Pie Chart, Line Chart, Bar Chart, Area Chart, Scatter Chart, Hexbin Chart, etc.

arrow_forward
Read and Write Files via Python

Read and Write Files via Python

This series provides examples and tutorials about reading and writing files via Python.

arrow_forward
Querying Teradata using SQL

Querying Teradata using SQL

This series collects commonly used SQL queries to retrieve data from Teradata database. It also shows you how to do some basic filters and transformation using SQL statements. 

arrow_forward
Teradata Functions

Teradata Functions

Explore frequently used Teradata SQL functions.

arrow_forward
Install Big Data Tools on Linux

Install Big Data Tools on Linux

This series provides detailed tutorials about installing big data tools such as Hadoop, Spark, Sqoop, Zeppelin, Hive, Sqoop, etc. on UNIX-alike systems such as Linux or MacOS.  

* Logos used in the picture are registered trademarks of Apache or Linux foundations. 

arrow_forward
Big Data Tools on Windows 10

Big Data Tools on Windows 10

This series provides detailed tutorials about installing big data tools such as Hadoop, Spark, Sqoop, Zeppelin, Hive, Sqoop, etc. on Windows 10 using Java and Windows native libraries.  

* Logos used in the picture are registered trademarks of Apache or Microsoft. 


arrow_forward
Connecting to Databases via Python

Connecting to Databases via Python

There are quite a few different packages available that can be used in Python to connect to databases. This series provides examples about using Python to connect to SQL Server, Teradata, SQLite, Oracle, MySQL, etc. 

arrow_forward
Teradata Utilities - BTEQ, FastLoad, FastExport, TPT

Teradata Utilities - BTEQ, FastLoad, FastExport, TPT

Tutorials about Teradata utilities incl. BTEQ, FastLoad, FastExport, TPT, etc.

Examples are provided about loading XML, JSON and CSV files into Teradata and also about exporting data from Teradata database. 

arrow_forward