问题描述
|
目前，我有查询来输出一天的平均速度和最大速度作为我要优化的查询，像这样
SELECT V_VEHICLEID,V_LICENSENO,(SELECT ROUND(AVG(WP_SPEED),2) FROM WAYPOINTS WHERE DAY(WP_DATETIME) = 1 AND WP_VEHICLEID = V_VEHICLEID) AS AVG1,2) FROM WAYPOINTS WHERE DAY(WP_DATETIME) = 2 AND WP_VEHICLEID = V_VEHICLEID) AS AVG2,2) FROM WAYPOINTS WHERE DAY(WP_DATETIME) = 3 AND WP_VEHICLEID = V_VEHICLEID) AS AVG3,2) FROM WAYPOINTS WHERE DAY(WP_DATETIME) = 4 AND WP_VEHICLEID = V_VEHICLEID) AS AVG4,2) FROM WAYPOINTS WHERE DAY(WP_DATETIME) = 5 AND WP_VEHICLEID = V_VEHICLEID) AS AVG5,2) FROM WAYPOINTS WHERE DAY(WP_DATETIME) = 6 AND WP_VEHICLEID = V_VEHICLEID) AS AVG6,2) FROM WAYPOINTS WHERE DAY(WP_DATETIME) = 7 AND WP_VEHICLEID = V_VEHICLEID) AS AVG7,2) FROM WAYPOINTS WHERE DAY(WP_DATETIME) = 8 AND WP_VEHICLEID = V_VEHICLEID) AS AVG8,2) FROM WAYPOINTS WHERE DAY(WP_DATETIME) = 9 AND WP_VEHICLEID = V_VEHICLEID) AS AVG9,2) FROM WAYPOINTS WHERE DAY(WP_DATETIME) = 10 AND WP_VEHICLEID = V_VEHICLEID) AS AVG10,2) FROM WAYPOINTS WHERE DAY(WP_DATETIME) = 11 AND WP_VEHICLEID = V_VEHICLEID) AS AVG11,2) FROM WAYPOINTS WHERE DAY(WP_DATETIME) = 12 AND WP_VEHICLEID = V_VEHICLEID) AS AVG12,2) FROM WAYPOINTS WHERE DAY(WP_DATETIME) = 13 AND WP_VEHICLEID = V_VEHICLEID) AS AVG13,2) FROM WAYPOINTS WHERE DAY(WP_DATETIME) = 14 AND WP_VEHICLEID = V_VEHICLEID) AS AVG14,2) FROM WAYPOINTS WHERE DAY(WP_DATETIME) = 15 AND WP_VEHICLEID = V_VEHICLEID) AS AVG15,2) FROM WAYPOINTS WHERE DAY(WP_DATETIME) = 16 AND WP_VEHICLEID = V_VEHICLEID) AS AVG16,2) FROM WAYPOINTS WHERE DAY(WP_DATETIME) = 17 AND WP_VEHICLEID = V_VEHICLEID) AS AVG17,2) FROM WAYPOINTS WHERE DAY(WP_DATETIME) = 18 AND WP_VEHICLEID = V_VEHICLEID) AS AVG18,2) FROM WAYPOINTS WHERE DAY(WP_DATETIME) = 19 AND WP_VEHICLEID = V_VEHICLEID) AS AVG19,2) FROM WAYPOINTS WHERE DAY(WP_DATETIME) = 20 AND WP_VEHICLEID = V_VEHICLEID) AS AVG20,2) FROM WAYPOINTS WHERE DAY(WP_DATETIME) = 21 AND WP_VEHICLEID = V_VEHICLEID) AS AVG21,2) FROM WAYPOINTS WHERE DAY(WP_DATETIME) = 22 AND WP_VEHICLEID = V_VEHICLEID) AS AVG22,2) FROM WAYPOINTS WHERE DAY(WP_DATETIME) = 23 AND WP_VEHICLEID = V_VEHICLEID) AS AVG23,2) FROM WAYPOINTS WHERE DAY(WP_DATETIME) = 24 AND WP_VEHICLEID = V_VEHICLEID) AS AVG24,2) FROM WAYPOINTS WHERE DAY(WP_DATETIME) = 25 AND WP_VEHICLEID = V_VEHICLEID) AS AVG25,2) FROM WAYPOINTS WHERE DAY(WP_DATETIME) = 26 AND WP_VEHICLEID = V_VEHICLEID) AS AVG26,2) FROM WAYPOINTS WHERE DAY(WP_DATETIME) = 27 AND WP_VEHICLEID = V_VEHICLEID) AS AVG27,2) FROM WAYPOINTS WHERE DAY(WP_DATETIME) = 28 AND WP_VEHICLEID = V_VEHICLEID) AS AVG28,2) FROM WAYPOINTS WHERE DAY(WP_DATETIME) = 29 AND WP_VEHICLEID = V_VEHICLEID) AS AVG29,2) FROM WAYPOINTS WHERE DAY(WP_DATETIME) = 30 AND WP_VEHICLEID = V_VEHICLEID) AS AVG30,2) FROM WAYPOINTS WHERE DAY(WP_DATETIME) = 31 AND WP_VEHICLEID = V_VEHICLEID) AS AVG31,(SELECT ROUND(MAX(WP_SPEED),2) FROM WAYPOINTS WHERE DAY(WP_DATETIME) = 1 AND WP_VEHICLEID = V_VEHICLEID) AS MAX1,2) FROM WAYPOINTS WHERE DAY(WP_DATETIME) = 2 AND WP_VEHICLEID = V_VEHICLEID) AS MAX2,2) FROM WAYPOINTS WHERE DAY(WP_DATETIME) = 3 AND WP_VEHICLEID = V_VEHICLEID) AS MAX3,2) FROM WAYPOINTS WHERE DAY(WP_DATETIME) = 4 AND WP_VEHICLEID = V_VEHICLEID) AS MAX4,2) FROM WAYPOINTS WHERE DAY(WP_DATETIME) = 5 AND WP_VEHICLEID = V_VEHICLEID) AS MAX5,2) FROM WAYPOINTS WHERE DAY(WP_DATETIME) = 6 AND WP_VEHICLEID = V_VEHICLEID) AS MAX6,2) FROM WAYPOINTS WHERE DAY(WP_DATETIME) = 7 AND WP_VEHICLEID = V_VEHICLEID) AS MAX7,2) FROM WAYPOINTS WHERE DAY(WP_DATETIME) = 8 AND WP_VEHICLEID = V_VEHICLEID) AS MAX8,2) FROM WAYPOINTS WHERE DAY(WP_DATETIME) = 9 AND WP_VEHICLEID = V_VEHICLEID) AS MAX9,2) FROM WAYPOINTS WHERE DAY(WP_DATETIME) = 10 AND WP_VEHICLEID = V_VEHICLEID) AS MAX10,2) FROM WAYPOINTS WHERE DAY(WP_DATETIME) = 11 AND WP_VEHICLEID = V_VEHICLEID) AS MAX11,2) FROM WAYPOINTS WHERE DAY(WP_DATETIME) = 12 AND WP_VEHICLEID = V_VEHICLEID) AS MAX12,2) FROM WAYPOINTS WHERE DAY(WP_DATETIME) = 13 AND WP_VEHICLEID = V_VEHICLEID) AS MAX13,2) FROM WAYPOINTS WHERE DAY(WP_DATETIME) = 14 AND WP_VEHICLEID = V_VEHICLEID) AS MAX14,2) FROM WAYPOINTS WHERE DAY(WP_DATETIME) = 15 AND WP_VEHICLEID = V_VEHICLEID) AS MAX15,2) FROM WAYPOINTS WHERE DAY(WP_DATETIME) = 16 AND WP_VEHICLEID = V_VEHICLEID) AS MAX16,2) FROM WAYPOINTS WHERE DAY(WP_DATETIME) = 17 AND WP_VEHICLEID = V_VEHICLEID) AS MAX17,2) FROM WAYPOINTS WHERE DAY(WP_DATETIME) = 18 AND WP_VEHICLEID = V_VEHICLEID) AS MAX18,2) FROM WAYPOINTS WHERE DAY(WP_DATETIME) = 19 AND WP_VEHICLEID = V_VEHICLEID) AS MAX19,2) FROM WAYPOINTS WHERE DAY(WP_DATETIME) = 20 AND WP_VEHICLEID = V_VEHICLEID) AS MAX20,2) FROM WAYPOINTS WHERE DAY(WP_DATETIME) = 21 AND WP_VEHICLEID = V_VEHICLEID) AS MAX21,2) FROM WAYPOINTS WHERE DAY(WP_DATETIME) = 22 AND WP_VEHICLEID = V_VEHICLEID) AS MAX22,2) FROM WAYPOINTS WHERE DAY(WP_DATETIME) = 23 AND WP_VEHICLEID = V_VEHICLEID) AS MAX23,2) FROM WAYPOINTS WHERE DAY(WP_DATETIME) = 24 AND WP_VEHICLEID = V_VEHICLEID) AS MAX24,2) FROM WAYPOINTS WHERE DAY(WP_DATETIME) = 25 AND WP_VEHICLEID = V_VEHICLEID) AS MAX25,2) FROM WAYPOINTS WHERE DAY(WP_DATETIME) = 26 AND WP_VEHICLEID = V_VEHICLEID) AS MAX26,2) FROM WAYPOINTS WHERE DAY(WP_DATETIME) = 27 AND WP_VEHICLEID = V_VEHICLEID) AS MAX27,2) FROM WAYPOINTS WHERE DAY(WP_DATETIME) = 28 AND WP_VEHICLEID = V_VEHICLEID) AS MAX28,2) FROM WAYPOINTS WHERE DAY(WP_DATETIME) = 29 AND WP_VEHICLEID = V_VEHICLEID) AS MAX29,2) FROM WAYPOINTS WHERE DAY(WP_DATETIME) = 30 AND WP_VEHICLEID = V_VEHICLEID) AS MAX30,2) FROM WAYPOINTS WHERE DAY(WP_DATETIME) = 31 AND WP_VEHICLEID = V_VEHICLEID) AS MAX31
FROM VEHICLES
WHERE V_USER = \'tc\'
SELECT WP_VEHICLEID AS VEHICLE,V_LICENSENO AS REGNO,DATE(WP_DATETIME) AS SUM_DATE,ROUND(AVG(WP_SPEED),2) AS AVG_SPEED,ROUND(MAX(WP_SPEED),2) AS MAX_SPEED
FROM WAYPOINTS,VEHICLES
WHERE MONTH(WP_DATETIME) = 6
AND WP_odoMETER 0
AND V_VEHICLEID = WP_VEHICLEID
AND V_USER = \'tc\'
GROUP BY WP_VEHICLEID,DATE(WP_DATETIME)
ORDER BY WP_VEHICLEID,WP_DATETIME
========================================================
VEHICLE| 1 | 2 | 3 | 4 |
-------------------------------------------------
| AVG | MAX | AVG | MAX | AVG | MAX | AVG | MAX |
========================================================
CAR A | 10 | 30 | 90 | 160 | .......................
CAR B | 50 | 90 | 0 | 0 | .......................
CAR C | 15 | 20 | 10 | 10 | .......................
========================================================
解决方法
试试这样的事情-
SELECT
v.V_VEHICLEID,ROUND(AVG(IF(DAY(WP_DATETIME) = 1,wp.WP_SPEED,NULL)),2) AS AVG1,ROUND(AVG(IF(DAY(WP_DATETIME) = 2,2) AS AVG2,ROUND(AVG(IF(DAY(WP_DATETIME) = 3,2) AS AVG3,...
ROUND(MAX(IF(DAY(WP_DATETIME) = 1,2) AS MAX1,ROUND(MAX(IF(DAY(WP_DATETIME) = 2,2) AS MAX2,ROUND(MAX(IF(DAY(WP_DATETIME) = 3,2) AS MAX3,...
FROM VEHICLES v
JOIN WAYPOINTS wp ON wp.WP_VEHICLEID = v.V_VEHICLEID
GROUP BY
wp.WP_VEHICLEID