Mysql不支持FULL JOIN怎么办？

Mysql不支持FULL JOIN怎么办？html 方法是使用 UNION ALL 模拟全链接，但有技巧。sql SELECT * FROM t1 LEFT JOIN t2 ON t1.id = t2.id UNION ALL SELECT * FROM t1 RIGHT JOIN t2 ON t1.id = t2.id WHERE t1.id IS NULL 若是，   要S

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