“Kueri SQL Untuk bergabung dengan dua tabel berdasarkan cap waktu terdekat” Kode Jawaban

Kueri SQL Untuk bergabung dengan dua tabel berdasarkan cap waktu terdekat

SELECT case.id, case.resolution, case.timestamp, class.value
  FROM closed_cases AS case
  LEFT JOIN (select c.*, 
                    (select min(timestamp)
                     from classifications c1
                      where c1.timestamp > c.timestamp) timeend
             from classifications c) AS class 
  ON case.timestamp >= class.timestamp and 
     (case.timestamp < class.timeend or class.timeend IS NULL)
  WHERE case.timestamp BETWEEN $1 AND $2;