I have a rather big SQL statement that I am working with in MS Access 2010. Here it goes:
SELECT
W.ID AS wid,
W.wpt_ty AS ty,
W.wpt_num AS num,
W.wpt_nxt AS nxt,
W.latdeg AS lat,
W.londeg AS lon,
W.alt AS alt,
W.mission_id AS mid,
W.ctg1 AS ctg1,
W.ctg2 AS ctg2,
W.ctg3 AS ctg3,
W.ctg4 AS ctg4,
W.wpt_index AS indx,
W.vel AS vel,
W.tu AS tu,
R.route_num AS rnum,
R.AC_num AS ac,
R.route_type AS rtype,
R.LastUpdatedOn AS d8,
R.LastUpdatedBy AS auth,
R.flight_wpt_count AS wfcount,
M.mission_name AS msnName,
V.Description AS vstatus,
R.disallowed_reason_id AS did,
CW.wpt_num AS c1num,
CR.matching_route_id AS c1mrid,
CW.wpt_index AS c1indx,
CRU.runway_name AS c1rnwy,
CR.route_num AS c1rnum
FROM Validation AS V
(RIGHT JOIN Runways AS CRU
INNER JOIN (Routes CR
INNER JOIN Waypoints CW ON CR.ID = CW.route_id)
ON Runways.ID = Routes.runway_id
INNER JOIN ((Missions as M
INNER JOIN Routes AS R ON M.ID = R.mission_id)
INNER JOIN Waypoints AS W ON (R.ID = W.route_id)
AND (M.ID = W.mission_id)) ON
V.ID = R.validated
WHERE (((R.matching_route_id)=307543) AND ((R.validated) <> 0 ))
AND (((CW.mission_id)=mid) AND ((CW.wpt_num) = (ctg1))))
If you look at the bottom, you can see am I referencing the values ctg1 and mid on a Right Join while the Inner Joins reference other literal values. Eventually I will want to do the same for ctg2, ctg3, and ctg4
Right now I am running these as 2 separate queries but finding it to be way too slow. If I can join combine the queries (sort of like how I am showing here) it could speed things up greatly. But I am at a loss for how to:
- Using select values earlier in said query from the Inner/Left join and push them into values needed on the Right join.
- I may be using joins incorrectly, but I thought they had to do with combining data from possible the same tables, just on different pivot points.
- How to use the MS Access GUI to help write a query like this.
- I know this is for MS Access but I am tagging for MySQL just in case there are similar queries there which can be ported to MS Access?
