Append Two Data sets with different fields

[TimD1]

Hi, 

I am sure there is a simple solution to this, but I am attempting to append two data sets with a mix of similar and different field headings. I simply want the 'different' fields to be added as per the example below. Is this possible at all?

Thanks in advance!!

Set A:

Set B:

The output I want - Set A+B:

[MichalM · Accepted solution]

@TimD1 

If you use the Union tool in its default setting - autoconfig by name - you will achieve what you need.

[echuong1 · Accepted solution]

You can use the union tool to achieve this. It will essentially combine all fields and all records. Let me know if that works!