$mul

Reference type:Cheat sheetFormat:Syntax + example + use case

Reference group: Update operator families

What it does

Multiplies existing numeric fields by a factor.

Syntax

{$mul: { field: factor }}

Use case

Controlled scaling.

$mul: practical example
db.metrics.updateMany({}, { $mul: { score: 1.1 } })
💡 Explanation Multiplies existing numeric fields by a factor. When to use it Controlled scaling.
Key Takeaways
  • Multiplies existing numeric fields by a factor.
  • Typical use: Controlled scaling.