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Join Multiple Tool

The Join Multiple tool combines two or more inputs based on a commonality between the input tables. By default, the tool outputs a full outer join. See Join Tool.

Configure the tool

1. Select how to perform the Join.

   • Join by Record Position: Select this option when the input tables to be joined have the same field structure, and the data is joined by its position within the two tables.
   • Join by Specific Field: Select this option when the input tables have one or more field in common (such as an ID) and the data is joined based on the shared field.
   • Select the join field to join on for each input using the related list. Designer automatically selects the join field for an input if the same field name was already selected for a different input.
   • If multiple join fields are desired, an additional row of join fields can be configured. Click on the drop down to choose additional join field per input.
   • To delete a join field, select the field to be removed and click the delete button on the right.

   • Choose the preferred behavior on how Cartesian Joins are handled. Cartesian joins occur when every row of one table is joined to every row of another table; they are computationally intensive and typically done by mistake.

     • Allow All multidimensional Joins: The multidimensional join will occur with no error or warning reported.
     • Warn on multidimensional joins of more than 16 Records: A warning will be reported in the Results window that a multidimensional join has occurred.
     • Error on multidimensional joins of more than 16 Records: An error will be reported in the Results window that a multidimensional join has occurred and downstream processing will stop.
2. Only Output Records that Join from All Inputs: Select this box to only allow records that meet all Join criteria to be passed. When unselected, all records are returned including NULL field values where records did not meet Join criteria.
3. Use the table to modify the incoming data stream. Each row in the table represents a column in the data.
Select, deselect, and reorder columns

To include a column in data, select the check box to the left of the column name. Deselect the check box to exclude the column.

To reorder the columns of data:

1. Click to highlight a row, or click and drag down to highlight multiple rows.
2. Click the or arrows, or right-click and drag, to move the rows to a new location.

The Unknown column is selected by default. It allows new columns in the data. Move the column to the location where you want a new column to be.

Modify data type and size

To change the supported length (characters for string and numeric fixed decimal types) or measurement (bytes for other numeric types) of data in a column, click Size and type a number. Size varies by data type and can be edited for fixed decimal numeric types and all string types. See Data Types.

Use the [data type]: Forced option to ensure a column always contains the expected data type; this is helpful when creating macros. See Macros.

Rename a column or add a description

To change the name of a column, click Rename and type the new name.

To add a description, click Description and type a description.

View more options
After selecting or highlighting rows (columns of data) in the table, click Options to view more configuration options:
• Save/Load: Save the column configuration as a .yxft file. The Alteryx Field Type File is a text file can be used in other workflows using the Load Field Names or Load File Names and Types options.
• Select: Select or deselect all or highlight columns. Options include Select All and Deselect All.
• Change Field Type of Highlighted Fields: Change the data type of all highlighted columns at once.
• Sort: Sort the column order in ascending or descending order. Options include Sort on Original Field Name, Sort on New Field Name, and Sort on Field Type, or Revert to Incoming Field Order.
• Move: Move highlighted columns to the top or bottom of the list.
• Add Prefix to Field Names: Add a prefix to the selected or highlighted column name.
• Add Suffix to Field Names: Add a suffix to the selected or highlighted column name.
• Remove Prefix or Suffix: Remove the prefix or suffix from the selected or highlighted column name.
• Clear All Renames: Remove the new name for all column.
• Clear Highlighted Renames: Remove the new name for all highlighted columns.
• Revert All to Original Type and Size: Undo all changes to type and size in all columns and use the original values.
• Revert Highlighted to Original Type and Size: Undo changes to type and size in the selected or highlighted columns and use the original values.
• Forget All Missing Fields: Remove all columns that are no longer included in the data.
• Forget Highlighted Missing Fields: Remove all highlighted columns that are no longer included in the data.
• Deselect Duplicate Fields: Deselect the second column when duplicate column names exist; this optional is only available with multiple inputs.

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