# Merging

{% content-ref url="merging/join-by-id" %}
[join-by-id](https://docs.kuwala.io/transformation-catalog/merging/join-by-id)
{% endcontent-ref %}

{% content-ref url="merging/union" %}
[union](https://docs.kuwala.io/transformation-catalog/merging/union)
{% endcontent-ref %}