Limit
Limits the number of records passed to the next stage in the pipeline.
Limit takes a positive integer that specifies the maximum number of records to pass along.
10 // return the top 10 records (see warning about ordering)
Warning about ordering
Records aren't guaranteed to return in any particular or consistent ordering unless:
- a Sort stage exists earlier in the pipeline.
- That sort stage sorts on a field or fields with unique values.