我不确定解释这一点的最佳方式,但我有一个机场列表。我希望能够获取该机场列表并使用该信息将这些信息放入往返这些机场的定期航班列表中。这是我到目前为止所拥有的:
DROP FUNCTION IF EXISTS GreaterCircleNm;
DELIMITER go
CREATE FUNCTION GreaterCircleNm( lat1 FLOAT, lon1 FLOAT, lat2 FLOAT, lon2 FLOAT ) RETURNS float
BEGIN
DECLARE pi, q1, dist FLOAT;
SET pi = PI();
SET lat1 = lat1 * pi / 180;
SET lon1 = lon1 * pi / 180;
SET lat2 = lat2 * pi / 180;
SET lon2 = lon2 * pi / 180;
SET q1 = ACOS(sin(lat1)*sin(lat2)+COS(lat1)*COS(lat2)*COS(lon1-lon2));
SET dist = q1*180*60/pi;
RETURN dist;
END;
go
DELIMITER ;
INSERT INTO phpvms_schedules (depicao, arricao, distance)
SELECT
depart.icao,
arrive.icao,
ROUND(GreaterCircleNm(depart.lat,depart.lng,arrive.lat,arrive.lng),2) as Nm
FROM phpvms_airports AS depart
INNER JOIN phpvms_airports AS arrive ON depart.icao <> arrive.icao
我不知道下一步该去哪里。当我尝试运行代码时,我也遇到了这个错误:
1452 - 无法添加或更新子行:外键约束失败 (
virtu259_phpvms
.phpvms_schedules
, CONSTRAINTphpvms_schedules_ibfk_1
FOREIGN KEY (code
) REFERENCESphpvms_airlines
(code
) ON UPDATE CASCADE)