A meta collection about Loops, Switches, Paths and Flow Variables in KNIME (and some ZIP files) Start with KNIME's Flow Control Guide https://docs.knime.com/latest/analytics_platform_flow_control_guide/ KNIME course about loops https://www.knime.com/self-paced-course/l2-dw-knime-analytics-platform-for-data-wranglers-advanced/lesson4 @armingrudd articles about loops and flow variables https://forum.knime.com/t/how-to-include-file-csv-writer-in-a-loop/18346/2?u=mlauber71 Nodeguide to loop examples https://www.knime.com/nodeguide/control-structures/loops Special loop example involving data bases https://forum.knime.com/t/joiner-node-in-loop/11343/5?u=mlauber71 Recursive Loop https://forum.knime.com/t/recursive-row-loop-for-sales-forecasting/12955/10?u=mlauber71 fun with URI, URL and File Paths https://hub.knime.com/mlauber71/spaces/Public/latest/kn_example_uri_url_path_fun_with?u=mlauber71 more fun with URI, URL and File Paths - work with the new Path variable format to list and move/copy files https://hub.knime.com/mlauber71/spaces/Public/latest/kn_example_uri_url_path_more_fun_with?u=mlauber71 A collection of methods to ZIP and UNZIP files with KNIME (and R) https://hub.knime.com/mlauber71/spaces/Public/latest/kn_example_r_zip_archiv/?u=mlauber71 [switch] Check if column is present and use if-switch accordingly https://hub.knime.com/mlauber71/spaces/Public/latest/kn_example_if_switch?u=mlauber71 [switch] Use Java Snippet to check if Column is there, fill a FlowVariable and then activate if switch https://hub.knime.com/mlauber71/spaces/Public/latest/kn_example_java_if_column_exists_switch?u=mlauber71 [switch] Hive - how to handle missing tables in Hive? (or any database) https://hub.knime.com/mlauber71/spaces/Public/latest/kn_example_hive_missing_table_switch?u=mlauber71 [switch] Two ways to handle combination of Flow variables from Python and If switches https://hub.knime.com/mlauber71/spaces/Public/latest/kn_example_python_flow_variable_if_switch?u=mlauber71 use loop and the Wait node to execute a database query at fixed times https://forum.knime.com/t/start-a-workflow-e-g-a-database-query-after-a-certain-time/30287/36?u=mlauber71