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What do you mean it doesn't use any joins? Just because the word "join" isn't present doesn't mean there aren't joins. There are other ways to join, and "c.company_code = l.company_code" is an example that works in MySQL (and Oracle).
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What do you mean it doesn't use any joins? Just because the word "join" isn't present doesn't mean there aren't joins. There are other ways to join, and "c.company_code = l.company_code" is an example that works in MySQL (and Oracle).