sqlite 3.4 updating table with data from different table - changed with 3.3 - newbie question All of the other questions on this seem to be before 3.3 when sqlite added an update join feature? Newbie here, so I may even be getting the terminology wrong. I am trying to update the issbn field in table GULLfromLG (currently empty), with data from the issbn field in BIBinfo (field can be empty in a given record).
I am using SQLiteStudio. From looking through the documentation, sqlitetutorial, w3resource, and general web searches I believe the following should work. But it doesn't. The processing happens, is declared successful, but all the fields in GULLfromLG are empty. What am I missing?
    UPDATE GULLfromLG
   SET issbn = (
   select issbn
  FROM BIBinfo
 WHERE bibno = bibno)

I have also tried naming the fields with variations of
GULLfromLG.issbn GULLfromLG.bibno BIBinfo.issbn BIBinfo.bibno
Any help would be greatly appreciated!
You need to gove sqllite the chance to know which column from which table you mean
UPDATE GULLfromLG
   SET issbn = (
   SELECT issbn
  FROM BIBinfo
 WHERE bibno = GULLfromLG.bibno)
[Example](http://sqlfiddle.com/#!5/c6687/1)