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Compound (Composite) Indexes - MariaDB Knowledge Base

A mini-lesson in "compound indexes" ("composite indexes")

This document starts out trivial and perhaps boring, but builds up to more interesting information, perhaps things you did not realize about how MariaDB and MySQL indexing works.

This also explains [EXPLAIN][1] (to some extent).

hoannc54

<?php

namespace Minitest;

abstract class AbstractFoo
{
    protected function bar()
    {
        return $this->baz();
    }