$sortByCount
Reference group: Pipeline stages
What it does
Groups by expression, counts, then sorts descending by count.
Syntax
{$sortByCount: expression}
Use case
Find popular categories.
$sortByCount: practical example
{ $sortByCount: "$category" }💡 Explanation
Groups by expression, counts, then sorts descending by count.
When to use it
Find popular categories.
Key Takeaways
- Groups by expression, counts, then sorts descending by count.
- Typical use: Find popular categories.