激起许多事情值得尝试优化一个MySQL查询连接7台时?MySQL查询优化
select trips.tripid as tripid
, stops.stopdescrption as "perron"
, DATE_FORMAT(segments.segmentstart, "%H:%i") as "time"
, DATE_FORMAT(trips.tripend, "%H:%i") as "arrival"
, UPPER(routes.routepublicidentifier) as "lijn"
, plcend.placedescrption as "destination"
from calendar
join trips on calendar.vsid=trips.vsid
join routes on routes.routeid=trips.routeid
join places plcstart on plcstart.placeid=trips.placeidstart
join places plcend on plcend.placeid=trips.placeidend
join segments on segments.tripid = trips.tripid
join stops on segments.stopid = stops.stopid
where (stops.stopid = :perrons0
OR stops.stopid = :perrons1 OR stops.stopid = :perrons2
OR stops.stopid = :perrons3 OR stops.stopid = :perrons4
OR stops.stopid = :perrons5 OR stops.stopid = :perrons6
OR stops.stopid = :perrons7 OR stops.stopid = :perrons8
OR stops.stopid = :perrons9 OR stops.stopid = :perrons10
OR stops.stopid = :perrons11 OR stops.stopid = :perrons12
OR stops.stopid = :perrons13 OR stops.stopid = :perrons14
)
AND calendar.vscdate = DATE(DATE_ADD(now(), INTERVAL "07:00" HOUR_MINUTE))
AND segments.segmentstart >= TIME(DATE_ADD(now(), INTERVAL "07:00" HOUR_MINUTE))
AND routes.routeservicetype = 0
AND segments.segmentstart > "00:00:00"
ORDER BY segments.segmentstart
有查询,我似乎无法想到的任何事情去改变那将优化这...这超时....
任何提示的欢迎!
你有什么指标? –
'EXPLAIN'计划展示了什么? –