• polytropic2310 - Tuesday, February 28, 2017 5:51 AM

    Hello,

    I get this surprising result with indexes: they don't help to improve performances.

    --snip

    Please how can I improve this ?

    Thanks by advance,

    Steve

    Using meaningful table aliases would be an improvement, for maintainability.

    If you haven't even tried to resolve your issue, please don't expect the hard-working volunteers here to waste their time providing links to answers which you could easily have found yourself.