$unionWith
Reference group: Pipeline stages
What it does
Combines pipeline results from another collection.
Syntax
{$unionWith: { coll, pipeline? }}
Use case
Query current and archived records together.
$unionWith: practical example
{ $unionWith: { coll: "archivedOrders", pipeline: [{ $match: { status: "paid" } }] } }💡 Explanation
Combines pipeline results from another collection.
When to use it
Query current and archived records together.
Key Takeaways
- Combines pipeline results from another collection.
- Typical use: Query current and archived records together.