1 Matching Annotations
  1. Last 7 days
  2. stackoverflow.com stackoverflow.com
    Select first row in each GROUP BY group?
    1
    1. TylerRick 14 Aug 2024
      The perfect index for the above query would be a multi-column index spanning all three columns in matching sequence and with matching sort order:
      database: performance SQL: indexes
    Visit annotations in context

    Tags

    Annotators

    URL

    stackoverflow.com/questions/3800551/select-first-row-in-each-group-by-group