> For the complete documentation index, see [llms.txt](https://doc.duaer.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://doc.duaer.com/build/merge.md).

# Configure the Merge node in Duaer

In Duaer, Merge defaults to Mode Append, which lines up items from each input one after another. To join by fields, set Mode to Combine.
## Append items from two inputs

1. Search for Merge. Connect each branch to its own input.
2. Leave Mode on Append.
3. Select Execute step. The output is one list with items from each input in order.

Mode can also be Combine, SQL Query, or Choose Branch.

For Combine, Combine By defaults to Matching Fields. Set Fields to Match (Input 1 Field / Input 2 Field). Output Type defaults to Keep Matches.

Refer to [Merge branches in Duaer](/flow-logic/merging.md). To diff two sides, refer to [Compare two inputs with Compare Datasets in Duaer](/build/compare-datasets.md).
## Questions

### Does Merge in Duaer wait for every connected input?

Yes. Each Mode waits until the inputs that take part in the merge have data before continuing.