mySQL, three tables: UPDATE multiple rows (each with a different value)

Question

I have three tables in mySQL:

TABLE:CollectionAttributeValues
cID
akID
avID

TABLE: atDefault
avID
value

TABLE: CollectionVersions
cID
cvName

Looks Like

CollectionVersions
cID  cvName
1    Billete
5    Tony

atDefault
avID value
1    B.B
3    T.T

CollectionAttributeValues
cID akID avID
1   29   1
5   29   3

I need to take all the values (the column named values) in atDefault" and put it into cvName in CollectionVersions WHERE akID = 29 in CollectionAttributeValues

Basically, take "Billette" and change it to "BB". AND also take "Tony" and change it to "TT".

So far I came up with this

SELECT value
FROM `atDefault` AS d
LEFT JOIN `CollectionAttributeValues` AS v ON d.avID = v.avID
WHERE v.akID =29

But I don't know how to insert the resulting values into the "cvName" column in CollectionVersions...

Answer 1

To UPDATE all the columns of the table CollectionVersions with the data that you get form the query. Try the below query -

UPDATE CollectionVersions cv 
SET cvName = 
(SELECT value
 FROM `atDefault` AS d
 LEFT JOIN `CollectionAttributeValues` AS v ON d.avID = v.avID
 WHERE v.akID =29
 AND cv.cID = v.cID)