Question

Suppose I have a table as follows: (on DB2 9.7.2)

       COL1            COL2             COL3
-----------      ----------       ----------
          3               4              xyz
          3               4              xyz

Now I want to write a query such that only one from these two identical records will be deleted. How can I achieve this?

I can think of :
delete from ;

or

delete from where col1=3;

but both of the above queries will delete both records whereas I want to keep one of them.

Answer 1

If LIMIT doesn’t work, this will:

DELETE FROM (SELECT * FROM tbl WHERE col = 3 FETCH FIRST ROW ONLY)