MySQL CASE…WHERE…THEN statements

Question

I have a MySQL UPDATE statement that uses a CASE clause

UPDATE partsList SET quantity =  
CASE
  WHEN partFK = 1 THEN 4
  WHEN partFK = 2 THEN 8
END
WHERE bu         


        

Answer 1

Add ELSE NULL or something before the END of the case. See http://dev.mysql.com/doc/refman/5.0/en/case-statement.html for more info.