MYSQL : How to retrieve a certain Value of a variable value?

Question

我有一个关于复杂查询的问题。所以任务如下:

With which connections can or could one fly from Düsseldorf (ICAO_Code : EDDF)  
to Rome (ICAO_Code: LIRA), whereby a travel time of 24 hours should not be 
exceeded,
you are allowed to change trains for a maximum of 1 hour and have a minimum 
transfer time of 1 hour?

表格如下所示:

**flightexecution** (FlightNo, DepartureDateAndTimeUTC, ICAO_Origin, 
ICAO_Destination, PlaneID, FlightDurationInMinutes)

和

**airport** (ICAO_Code, AirportName, Address,ID)

我当前的代码如下所示:

SELECT fe.ICAO_Code_Origin, 
    CASE
    WHEN fe.ICAO_Code_Origin = 'EDDF' AND fe.ICAO_Code_Destination = 'LIRA' 
    THEN 'DIREKTFLUG' 
    ELSE fe.ICAO_Code_Destination 
    AS via,
    CASE
    WHEN fe.ICAO_Code_Origin = 'EDDF' AND fe.ICAO_Code_Destination = 'LIRA'
    THEN 0
    ELSE DATEDIFF(min, , SELEC....

最后一条语句是有问题的。我想说:“(中间站的DepartureDateAndTime)-(DepartureDateAndTime + FlightDurationInMinutes)之间的时间差。

但是我如何告诉 MYSQL 我想要这个特定的 ICAO_Origin？

Answer 1

查找 SELECT syntax

SELECT FlightNo,...
FROM flightexecution fe
WHERE fe.ICAO_Code_Origin = 'EDDF'
  AND fe.ICAO_Code_Destination = 'LIRA'
  AND FlightDurationInMinutes < 24*60;

没有提供足够的火车信息来回答该替代问题。