Ptt 大爆卦 | sql outer join + - 前往 https://stackoverflow.com/questions/4796872/how-can-i-do-a-full-outer-join-in-mysql

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並前往https://stackoverflow.com/questions/4796872/how-can-i-do-a-full-outer-join-in-mysql

How can I do a FULL OUTER JOIN in MySQL? - Stack Overflow

Beware of the answers here. The SQL standard says full join on is inner join on rows union all unmatched left table rows extended by nulls union all right table ...

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