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LaraCon 2018 - Addendum

Taken from Kai Sassnowskis' talk at LARACON EU from 2018 source:

  • Indeces aren't used when using functions (like e.G. YEAR() or MONTH()), use e.G. BETWEEN instead.
  • If not sure what is happening, use an EXPLAIN before your statement.
  • Multi column indeces go from left to right and you can not skip columns, so the defined order in the index matters.
  • An index and a query always have to go together.
  • Inequality Operators: Which query is more important? Is the introduction of another index the right approach?
  • "Indexing is my concern", not of others
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