15 · data

Aggregate

Combine many items into one — lists, counts, or merged fields.

When to use it

You need a single item summarizing many. Code can do the same — Aggregate is clearer for standard ops.

Writeup

How Aggregate works

Combine many items into one — lists, counts, or merged fields. You need a single item summarizing many. Code can do the same — Aggregate is clearer for standard ops.

Step by step — how to wire it

01
Start from many items
After Filter / HTTP that returned an array of items.
02
Add Aggregate
Choose all item data (or specific fields) into one output item.
03
Format for humans
Aggregate → Code/Set to craft Slack text, or Sheets one summary row.
04
Notify once
Single Slack message beats N pings.

How it functions

Aggregate modes

All item data into one list, or individual fields — depends on node version/options.

One item out

Downstream sees a summary object instead of N items.

Used for

Used for 1

Building a digest array for Slack

Used for 2

Counting successes after Split In Batches

Used for 3

Collapsing related rows before Respond

Tips

For custom math, Code may be simpler than fighting Aggregate options.

Don’t Aggregate before you still need per-item HTTP calls.

← Split In Batches Slack →