Group Loop Start

Group loop start, each iteration processes another group of rows. The column(s) to group on need to be specified. The input data table is sorted based on the specified columns before looping starts, by default. Sorting can be switched off if input data table is already properly sorted based on the columns to group on. If sorting is switched off, but input table is not properly sorted execution will be canceled.

Options

Column selection

The columns used to identify the groups.

Input is already sorted by group column(s)

If checked, the input data table will not be sorted before looping starts. The table must already be sorted properly by the columns to group on. If sorting is switched off, but input table is not properly sorted execution will be canceled.

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Links

• KNIME E-Learning Course: Section 7.2. Re-executing Workflow Parts: Loops

  www.knime.com/knime-introductory-course/chapter7/section2
• Selecting the top 50 rows of a table by a control columnby armingrudd on 2019-11-05

  forum.knime.com/p/74011
• How to “chunk” based on field contentby izaychik63 on 2020-03-06

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• Moving Aggregation By Categoryby HansS on 2020-07-23

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• Replace missing values based on another columnby armingrudd on 2019-08-26

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