MySQL 그룹 기능에서 지원되지 않는 참조

이 쿼리를 사용하는 데 문제가 있습니다. 쿼리 별 그룹에서 별칭을 참조로 사용할 수없는 것 같습니다.

SELECT v.V_VEHICLEID, v.V_LICENSENO,
ROUND((MAX(IF(DAY(WP_DATETIME) = 1, WP_ODOMETER, NULL)) - MIN(IF(DAY(WP_DATETIME) = 1, WP_ODOMETER, NULL))) / 1000) AS TRIP1,    
...,
ROUND((MAX(IF(DAY(WP_DATETIME) = 31, WP_ODOMETER, NULL)) - MIN(IF(DAY(WP_DATETIME) = 31, WP_ODOMETER, NULL))) / 1000) AS TRIP31,

ROUND(MAX(IF(DAY(WP_DATETIME) = 1, WP_FUELREAD, NULL)) - MIN(IF(DAY(WP_DATETIME) = 1, WP_FUELREAD, NULL)),2) AS FUEL1,
...,
ROUND(MAX(IF(DAY(WP_DATETIME) = 31, WP_FUELREAD, NULL)) - MIN(IF(DAY(WP_DATETIME) = 31, WP_FUELREAD, NULL)),2) AS FUEL31,

(SELECT TRIP1 / FUEL1) AS ECON1,
...,
(SELECT TRIP31 / FUEL31) AS ECON31
FROM VEHICLES v
JOIN WAYPOINTS wp on wp.WP_VEHICLEID = v.V_VEHICLEID
WHERE MONTH(wp.WP_DATETIME) = '6' AND v.V_USER = 'tc'
GROUP BY wp.WP_VEHICLEID

오류

참조 'TRIP1'이 지원되지 않음 (그룹 기능 참조)

어떤 해결책?

 

해결 방법

 

동일한 쿼리의 쿼리에서 정의한 열 별칭을 사용할 수 없습니다. 다음과 같이 시도하십시오.

SELECT   *,
         TRIP1 / FUEL1 AS ECON1,
         TRIP31 / FUEL31 AS ECON31,
         OTHER COLUMNS....
FROM
(
    SELECT    v.V_VEHICLEID, 
              v.V_LICENSENO,
              ROUND((MAX(IF(DAY(WP_DATETIME) = 1, WP_ODOMETER, NULL)) - MIN(IF(DAY(WP_DATETIME) =     1,     WP_ODOMETER, NULL))) / 1000) AS TRIP1,
              ROUND(MAX(IF(DAY(WP_DATETIME) = 1, WP_FUELREAD, NULL)) - MIN(IF(DAY(WP_DATETIME) = 1,     WP_FUELREAD, NULL)),2) AS FUEL1,
              ROUND((MAX(IF(DAY(WP_DATETIME) = 31, WP_ODOMETER, NULL)) - MIN(IF(DAY(WP_DATETIME) = 31, WP_ODOMETER, NULL))) / 1000) AS TRIP31,
              ROUND(MAX(IF(DAY(WP_DATETIME) = 31, WP_FUELREAD, NULL)) - MIN(IF(DAY(WP_DATETIME) = 31, WP_FUELREAD, NULL)),2) AS FUEL31,
              OTHER COLUMNS...
    FROM      VEHICLES v
    JOIN      WAYPOINTS wp
    ON        wp.WP_VEHICLEID = v.V_VEHICLEID
    WHERE     MONTH(wp.WP_DATETIME) = '6' 
    AND       v.V_USER = 'tc'
    GROUP BY  wp.WP_VEHICLEID
) t

 

참조 페이지 https://stackoverflow.com/questions/6532788