The Union tool appends two or more datasets with similar structures and gives a file with all the information of both datasets together.
For the scenarios, where we need to combine two different inputs, UNION tool comes in handy. With huge datasets sometimes its a requirement to show two datasets as a combined data for analysis purposes.
As shown in the below example, We have taken two data sets, shown as input 1 and input 2.
Input 1 Input 2
Combined output (append Input 1+ Input 2)
When the Union tool is applied, both the data sets will get combined automatically.
Configuration properties provide 3 options:
– This option will arrange fields by field name
– This option will arrange fields by their field order
– This option allows manually reorder of columns by clicking left and right arrow 
Output order option – this option allows to select Set a Specific Output Order and then click the arrows to arrange the input numbers.
