I have a table which holds a user name and their results in exams. There can be multiple entries per user. I am trying to return the last entry for each user. I can get the last entry in the table using the order by/limit method but how would this be applied per user. My table definition is like the following:
gradeid serial primary key, user text, grade char(1), entered timestamp,
Any help would be appreciated. Regards
What about a combination of a common table expression and a windowing function? You ought to be able to order by your criteria and then pull where the rowcount in the window is 1.