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This blog post is an introduction of how to use KNIME on Databricks. It's written as a guide, showing you how to connect to a Databricks cluster within KNIME Analytics Platform, as well as looking at several ways to access data from Databricks and upload them back to Databricks.A Guide in 5 SectionsThis "how-to" is divided into the following sections:How to connect to Databricks from KNIMEHow to connect to a Databricks Cluster from KNIMEHow to connect to a Databricks File System from KNIMEReading and Writing Data in DatabricksDatabricks DeltaWhat is Databricks?Databricks is a cloud-based data analytics tool for big data management and large-scale data processing. Developed by the same group behind Apache Spark, the cloud platform is built around Spark, allowing a wide variety of tasks from processing massive amounts of data, building data pipelines across storage file systems, to building machine learning models on a distributed system, all under a unified analytics platform. One advantage of Databricks is the ability to automatically split workload across various machines with on-demand autoscaling.The KNIME Databricks IntegrationKNIME Analytics Platform includes a set of nodes to support Databricks, which is available from version 4.1. This set of nodes is called the KNIME Databricks Integration and enables you to connect to your Databricks cluster running on Microsoft Azure or Amazon AWS cluster. You can access and download the KNIME Databricks Integration from the KNIME Hub.Note: This guide is explained using the paid version of Databricks. The good news is: Databricks also offers a free community edition of Databricks for testing and education purposes, with access to 6 GB clusters, a cluster manager, a notebook environment, and other limited services. If you are using the community edition, you can still follow this guide without any problem.Connect to DatabricksAdd the Databricks JDBC driver to KNIMETo connect to Databricks in KNIME Analytics Platform, first you have to add the Databricks JDBC driver to KNIME with the following steps.1. Download the latest version of the Databricks Simba JDBC driver at the official website. You have to register to be able to download any Databricks drivers. After registering, you will be redirected to the download page with several download links, mostly for ODBC drivers. Download the JDBC Drivers link located at the bottom of the page.Note: If you’re using a Chrome-based web browser and the registration somehow doesn’t work, try to use another web browser, such as Firefox.2. Unzip the compressed file and save it to a folder on your hard disk. Inside the folder, there is another compressed file, unzip this one as well. Inside, you will find a .jar file which is your JDBC driver file.Note: Sometimes you will find several zip files inside the first folder, each file refers to the version of JDBC that is supported by the JDBC driver. KNIME currently supports JDBC drivers that are JDBC 4.1 or JDBC 4.2 compliant.3. Add the new driver to the list of database drivers:In KNIME Analytics Platform, go to File > Preferences > KNIME > Databases and

IntroductionKNIME Analytics Platform is open source software for creating data scienceapplications and services. Intuitive, open, and continuously integrating newdevelopments, KNIME makes understanding data and designing data scienceworkflows and reusable components accessible to everyone.With KNIME Analytics Platform, you can create visual workflows with anintuitive, drag and drop style graphical interface, without the need forcoding.In this quickstart guide we’ll take you through the KNIME Workbench and show youhow you can build your first workflow. Most of your questions will probablyarise as soon as you start with a real project. In this situation, you’ll find alot of answers in the KNIME Workbench Guide,and in the E-Learning Course on our website.But don’t get stuck in the guides. Feel free to contact us and the widecommunity of KNIME Analytics Platform users, too, at theKNIME Forum. Another way of getting answersto your data science questions is to explore the nodes and workflows available on theKNIME Hub. We are happy to help you there!Start KNIME Analytics PlatformIf you haven’t yet installed KNIME Analytics Platform, you can do that on thisdownload page. For a step by step introduction,follow thisInstallation Guide.Start KNIME Analytics Platform and when the KNIME Analytics Platform Launcherwindow appears, define the KNIME workspace here as shown in Figure 1.Figure 1. KNIME Analytics Platform LauncherThe KNIME workspace is a folder on your local computer to store your KNIMEworkflows, node settings, and data produced by the workflow. The workflows anddata stored in your workspace are available through the KNIME Explorer in theupper left corner of the KNIME Workbench.After selecting a folder as the KNIME workspace for your project, clickLaunch. When in use, the KNIME Analytics Platform user interface - the KNIMEWorkbench - looks like the screenshot shown in Figure 2.Figure 2. KNIME WorkbenchThe KNIME Workbench is made up of the following components:KNIME Explorer: Overview of the available workflows and workflow groups inthe active KNIME workspaces, i.e. your local workspace, KNIME Servers, and yourpersonal KNIME Hub space.Workflow Coach: Lists node recommendations based on the workflows built bythe wide community of KNIME users. It is inactive if you don’t allow KNIME tocollect your usage statistics.Node Repository: All nodes available in core KNIME Analytics Platform and inthe extensions you have installed are listed here. The nodes are organized bycategories but you can also use the search box on the top of the node repositoryto find nodes.Workflow Editor: Canvas for editing the currently active workflow.Description: Description of the currently active workflow, or

KNIME Hub page to the KNIME Workbench.Accessing example workflows from within KNIME Analytics Platform:Expand the EXAMPLES mountpoint in the KNIME ExplorerNext, double click to see the example workflows ordered by categories, asshown in Figure 19. No credentials are necessary.Figure 19. Logging in to the EXAMPLES mountpointInside these categories, some workflow groups are named after single operations, e.g. filteringOther workflow groups have names that refer to broader topics, e.g. time seriesanalysisThe "50_Applications" workflow group contains workflows that cover entire usecases like churn prediction or fraud detectionTo download an example workflow:Drag and dropOr, copy and pastethe workflow into your LOCAL workspace. Double click the downloaded copy of the example workflow to open and edit it like any other workflow.Extensions and IntegrationsIf you want to add capabilities to KNIME Analytics Platform, you can installextensions and integrations. The available extensions range from free opensource extensions and integrations provided by KNIME to free extensionscontributed by the community and commercial extensions including noveltechnology nodes provided by our partners.The KNIME extensions and integrations developed and maintained by KNIME containdeep learning algorithms provided by Keras, high performance machine learningprovided by H2O, big data processing provided by Apache Spark, and scriptingprovided by Python and R, just to mention a few.Install extensions by:Clicking File on the menu bar and then Install KNIME Extensions…​. The dialog shown in Figure 20 opens.Selecting the extensions you want to installClicking Next and following the instructionsRestarting KNIME Analytics PlatformFigure 20. Installing Extensions and IntegrationsThe KNIME extensions and trusted community extensions are available perdefault via an URL to their update sites. Other extensions can be installed by first adding their update sites.To add an update site:Navigate to File → Preferences → Install/Update → Available Software SitesClick Add…​And either add a new update site by providing a URL via the Location fieldOr, by providing a file path to a zip filethat contains a local update site, via Archive…​Finally, give the update site some meaningful name and click OKAfter this is done, the extensions can be installed as described further above.Update to the latest KNIME version by:Clicking File and then Update KNIME…​ to make sure that you use thelatest version of the KNIME Software and the installed extensionsIn the window that opens, select the updates, accept the terms and conditions,wait until the update is finished, and restart KNIME Analytics PlatformTips & TricksGet Help and Discuss at the KNIME ForumLog in to our KNIME Community Forum, and join thediscussions