MySQL Creat View with all data where date is max - mysql

Question

I want to create a view which combines the data with the maximal date from the tables shown in the picture. These should be grouped by the profileID.
Database ERM
The profileIDs are linked to profile.userID.
I tried different approches in my code. The fort one slects the data where date is max, but the join doesn't work. Every profileID will be joined with the same data.
CREATE
ALGORITHM = UNDEFINED
DEFINER = `b91788dd8d05b5`#`%`
SQL SECURITY DEFINER
VIEW fitchallengersql1.profileview AS
Select p.userID,
(SELECT
`bf`.`bodyFat`
FROM
(`fitchallengersql1`.`bodyfatprofile` `bf`
JOIN `fitchallengersql1`.`profile` `p`)
WHERE
((`bf`.`profileID` = `p`.`userID`)
AND (`bf`.`date` = (SELECT
MAX(`fitchallengersql1`.`bodyfatprofile`.`date`)
FROM
`fitchallengersql1`.`bodyfatprofile`)))) AS `bodyFat`,
(SELECT
`bw`.`bodyweight`
FROM
(`fitchallengersql1`.`bodyweightprofile` `bw`
JOIN `fitchallengersql1`.`profile` `p`)
WHERE
((`bw`.`profileID` = `p`.`userID`)
AND (`bw`.`date` = (SELECT
MAX(`fitchallengersql1`.`bodyweightprofile`.`date`)
FROM
`fitchallengersql1`.`bodyweightprofile`)))) AS `bodyWeight`,
(SELECT
`bmi`.`bmi`
FROM
(`fitchallengersql1`.`bmiprofile` `bmi`
JOIN `fitchallengersql1`.`profile` `p`)
WHERE
((`bmi`.`profileID` = `p`.`userID`)
AND (`bmi`.`date` = (SELECT
MAX(`fitchallengersql1`.`bmiprofile`.`date`)
FROM
`fitchallengersql1`.`bmiprofile`)))) AS `bmi`
From profile
In the second one the join works how it should, but I can't figure out a way to select just the data where date is max.
CREATE
ALGORITHM = UNDEFINED
DEFINER = `b91788dd8d05b5`#`%`
SQL SECURITY DEFINER
VIEW `fitchallengersql1`.`profileview` AS
SELECT
`p`.`userID` AS `userID`,
`p`.`privacy` AS `privacy`,
`bs`.`size` AS `bodysize`,
`bw`.`bodyweight` AS `bodyweight`,
`bf`.`bodyFat` AS `bodyfat`,
`bmi`.`bmi` AS `bmi`
FROM
((((`fitchallengersql1`.`profile` `p`
JOIN `fitchallengersql1`.`bodysizeprofile` `bs`)
JOIN `fitchallengersql1`.`bodyweightprofile` `bw`)
JOIN `fitchallengersql1`.`bmiprofile` `bmi`)
JOIN `fitchallengersql1`.`bodyfatprofile` `bf`)
WHERE
((`p`.`userID` = `bs`.`profileID`)
AND (`p`.`userID` = `bw`.`profileID`)
AND (`p`.`userID` = `bmi`.`profileID`)
AND (`p`.`userID` = `bf`.`profileID`))
Hope someone could help me.
Thank you!
fleewe

Answer 1

Hope following query gives what you need. Please follow the pattern and join the rest of the tables. Please note that when the table grows these will definitely have performance issues as this require huge processing.
-- Select the columns that you need
select p.*, lbp.*
from profile p
inner join (
-- get the latest bmiprofile per user profile
select bp1.*
from bmiprofile bp1
inner join (select profileID, max(date) as date from bmiprofile group by profileID) as bp2 on bp1.prfileId = bp2.profileId and bp1.date = bp2.date
) as lbp on lbp.ProfileId = p.userId
-- Join the other tables in similar way

Answer 2

this is only a comment, but I needed formating capability:
Don't place the joining predicates into the where clause if using ANSI join syntax, instead use ON followed by the relevant predicates. e.g.
FROM `fitchallengersql1`.`profile` `p`
JOIN `fitchallengersql1`.`bodysizeprofile` `bs` ON `p`.`userID` = `bs`.`profileID`
JOIN `fitchallengersql1`.`bodyweightprofile` `bw` ON `p`.`userID` = `bw`.`profileID`
JOIN `fitchallengersql1`.`bmiprofile` `bmi` ON `p`.`userID` = `bmi`.`profileID`
JOIN `fitchallengersql1`.`bodyfatprofile` `bf` ON `p`.`userID` = `bf`.`profileID`