Question

I have 4 columns called ID, EQUIPID, VERSION, DESCRIPTION. Users can add additional columns so the SQL statement needs to be dynamic. The column ID is unique and will never duplicate; EQUIPID describes an equipment which means multiple EQUIPIDs can be the same; and VERSION describes the difference between the same EQUIPID entries.

How can i query to SELECT * and get only one of each EQUIPID with largest VERSION?

Answer 1

  SELECT tn.*
    FROM table_name tn
   WHERE tn.version =
          (SELECT MAX(sq.version)
             FROM table_name sq
            WHERE sq.equipid = tn.equipid);

Basically, select rows where the version is equal to the max version for that equipid.