Update row with select on same table

Question

I\'m trying to update row with same table query. Context:

ID        |  LANG       |  TEXT
----------------------------------
1         |  EN         |  Hello         


        

Answer 1

UPDATE TABLE
    SET
        TEXT = (SELECT TOP 1 text WHERE id = table.id AND LANG ='EN' AND TEXT IS NOT NULL) 
WHERE
    TEXT IS NULL;