Append tables by header name
Appending is a vertical stack. Header matching prevents a different column order from moving values into the wrong fields.
Check the schema before appending
Both tables must have the same unique header names. A missing field or an extra field stops the operation; blank-filling or dropping it would need a policy decision that the tool cannot make.
Align order explicitly
The first table defines output order. The second table is rearranged to that order by exact header names. Names are not normalized for case or surrounding spaces, so a mismatch remains visible.
Expect repeated rows to remain
Append retains every record and does not deduplicate. After stacking, run the duplicate tool with a suitable key if repetition is a concern; inspect its removed output before discarding anything.
Try this workflow: Append tables. It loads a labelled fictional example that you can edit.