Finishing

Stop the upstream after at most n records or values at this point in the pipeline.

• n a whole number from 1 to 4294967295

collection("patients") | sort(.admitted; desc) | limit(2)

Order the whole upstream by a field before the quoted jq stage.

• field a top-level field with a leading dot
• direction optional desc after a semicolon

collection("patients") | sort(.admitted; desc)

Order the sort field from greatest to least instead of ascending order.

Keep records by their revision append version, never by a time inside the record.

• from an included unsigned version or quoted RFC 3339 instant
• to an excluded bound of the same form, or $now

collection("patients") | window("1970-01-01T00:00:00Z"; $now)
collection("patients") | window(120; 240)

Consume the whole upstream and answer its size as the last stage.

patients(ward: "4B") | count

Drain records before jq into key, count and values groups in jq value order; missing fields group under null and no continuation is available.

• field a top-level field with a leading dot

collection("patients") | group_by(.ward)

Drain records before jq into one nearest-rank JSON number; empty numeric input gives null, zero selects the minimum, non-numbers are counted as skipped, and no continuation is available.

• field a top-level numeric field with a leading dot
• percentile a number from 0 to 100 inclusive

collection("patients") | percentile(.admitted; 95)