Working with Arrays and Joins
$unwind - Deconstruct Arrays
$unwind creates a document for each array element.
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$unwind and $lookup
Learning Objectives
- •Use $unwind for arrays
- •Join collections with $lookup
- •Combine stages effectively
Lesson Outline
LearnStep 1/2
$unwind and $lookup
python
$unwind Options
python
$unwind Use Cases
python
$lookup - Join Collections
python
unwind
python
$lookup with Pipeline
python
Multiple Lookups
python