Is it possible to SQL Update using row and column numbers? [closed]

Answer 1

Lets assume that you have some unique order field (ord_field) in your table. Then you could do something close to this:

UPDATE table SET value ='some value'
FROM (
SELECT *, (select COUNT(0) 
            from table t1 
            where t2.ord_field <= t1.ord_field 
            ) AS ord
FROM table t2
ORDER BY ord_field ASC) a WHERE table.ord_field = a.ord_field AND a.ord BETTWEN 2 and 4