mysql - Selecting a particular row when grouping data -


this question has answer here:

studentid  questionid  incorrect  unanswered flagged  pace  id  subtopicid ========================================================================== 1          1           1          0          0        2     1   1 1          1           0          0          0        4     2   1 1          2           0          0          0        8     3   1

i have table above values in it. want select the questions attempted student particular subtopic once. in case there multiple entries question want select 1 greater id. couldn't figure out way select question greater id. trying. 

select questionid      , pace      , id    table   studentid = 1     , subtopicid = 1   group      questionid   order      id desc;

can please tell me modifications in query or suggest new one?

can please try:

select questionid, max(id) maxid table studentid = 1   , subtopicid = 1 group questionid order id desc

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