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Re: What index works best?
Posted by: Rick James
Date: July 14, 2016 02:00PM

INDEX(code, name, type)

works for
WHERE code ...
WHERE code = '...' AND name ...
WHERE code = '...' AND name = '...' AND type ...
But not for
WHERE name... (without mention of code). Etc.

Use my cookbook to answer your own question:
http://mysql.rjweb.org/doc.php/index_cookbook_mysql
(Or ask us about specific queries.)

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