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SQL Three Consecutive Temperature Spikes
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SQL Three Consecutive Temperature Spikes

MediumSQL · PostgreSQL

Problem

Write a SQL query to identify all engines that experienced a temperature spike above a certain threshold for three consecutive flights at Rolls-Royce. Treat temperatures above 900 C as spikes, and determine consecutiveness from each engine's flight sequence.

Output

  1. One row per engine with a qualifying streak.
  2. Return engine_id, engine_name, first_streak_start_date, last_streak_end_date, and qualifying_streak_count.
  3. Sort by engine_id ascending.

Schema

engines
ColumnTypeDescription
engine_idPKVARCHAR(20)Unique engine identifier
engine_nameVARCHAR(100)Engine model name
flights
ColumnTypeDescription
flight_idPKINTUnique flight identifier
engine_idVARCHAR(20)Engine assigned to the flight
flight_dateDATEDate of the flight
flight_sequenceINTChronological sequence number for the engine
engine_flight_temperature
ColumnTypeDescription
reading_idPKINTUnique temperature reading identifier
flight_idINTFlight associated with the reading
engine_idVARCHAR(20)Engine that produced the reading
max_temperature_cDECIMAL(6,2)Maximum recorded temperature in Celsius
Tablesenginesflightsengine_flight_temperature
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