MySQL Join協助

Question

大家好，我正在努力創建一個查詢，以提供給定日期的飛行員時間表。 到目前為止，我已經

SELECT f.flight_date, l.lesson_date FROM Flight f JOIN lesson l ON f.pilot_idpilot = l.pilot_idpilot WHERE f.flight_date = CURDATE() OR l.lesson_date = CURDATE() AND pilot_idpilot = 7236;

我得到的結果是

Lesson_id | lesson_date | pilot_idpilot | idFlight | flight_date | pilot_id_pilot

有沒有一種方法可以指定飛行員參與的活動類型，例如

Activity | Date |

任何幫助都是極好的！ 謝謝男孩/女孩

Answer 1

這個怎么樣：

SELECT 'Lesson' as Activity, lesson_date as Date
FROM Flight f JOIN lesson l ON f.pilot_idpilot = l.pilot_idpilot 
WHERE l.lesson_date = CURDATE() AND pilot_idpilot = 7236
UNION
SELECT 'Flight' as Activity, flight_date as Date
FROM Flight 
WHERE f.flight_date = CURDATE() AND pilot_idpilot = 7236;