Merge Lists
Combine multiple lists into a single unified list for streamlined processing.
Merge Lists takes multiple separate lists and combines them into one unified list. Essential for consolidating data from different sources, combining campaign results, or preparing merged datasets for processing.
When to Use It
- Combine campaign lists from different advertising platforms
- Merge client data from multiple spreadsheets
- Consolidate URL lists from various sources
- Unify keyword lists before processing
Inputs
| Field | Type | Required | Description |
|---|---|---|---|
| Lists to Merge | Multiple Lists | Yes | Add multiple lists that you want to combine into one |
Outputs
| Output | Description |
|---|---|
| Merged List | Single list containing all items from the input lists |
Credit Cost
Free to use - no credits required.
How It Works
Takes multiple lists and combines them in the order you provide them:
Example:
Items are added in sequence - first all items from List 1, then all from List 2, and so on.
Real-World Examples
Unified Cross-Platform Reporting:
Best Practices
Order Matters:
- Lists are merged in the order you add them
- First list items appear first in the merged result
- Consider priority when arranging your lists
Data Consistency:
- Ensure all lists contain similar types of data
- Mixed data types work but may complicate later processing
- Consider standardizing formats before merging
Post-Merge Processing:
- Often useful to use Remove Duplicates after merging
- Count List Items to verify expected total
- Consider splitting large merged lists for processing
FAQ
Does merging preserve the order of items?
Does merging preserve the order of items?
Yes, items maintain their order within each list, and lists are combined in the sequence you provide them. List 1 items come first, then List 2 items, etc.
What happens if I merge lists with duplicate items?
What happens if I merge lists with duplicate items?
Duplicates are preserved in the merged list. If List 1 has “Campaign A” and List 2 also has “Campaign A”, the merged list will contain both. Use Remove Duplicates afterward if needed.
Can I merge lists with different data types?
Can I merge lists with different data types?
Yes, you can merge lists containing different types of data (text, numbers, etc.). However, ensure your downstream processing can handle the mixed data types appropriately.
Is there a limit to how many lists I can merge?
Is there a limit to how many lists I can merge?
You can add multiple lists to merge. The practical limit depends on your system’s memory and the size of the individual lists being combined.
What if one of my lists is empty?
What if one of my lists is empty?
Empty lists are handled gracefully - they simply don’t contribute any items to the merged result. The merge will continue with the non-empty lists.
How is this different from using multiple nodes separately?
How is this different from using multiple nodes separately?
Merging creates a single list that can be processed as one unit in subsequent nodes like Loop Over List, whereas separate lists would require separate processing chains.
Should I remove duplicates before or after merging?
Should I remove duplicates before or after merging?
Usually after merging, as you want to see the full scope of duplicates across all your source lists. Removing duplicates before merging might miss cross-list duplicates.