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FROM ORDER BY GROUP BY WHERE
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FROM ORDER BY GROUP BY WHERE
From Where Group by Order by
FROM ORDER BY GROUP BY WHERE
无法进行排序 只按第一个字段排序 按从左至右优先依次排序 按字段排序优先级依次排序
FROM WHERE CROUP BY ORDER BY
WHERE GROUP BY HAVING ORDER BY
无法进行排序 只按第一个字段排序 按从左至右优先依次排序 按从右至左优先依次排序
依次按自右至左的字段顺序排序 只按第一个字段排序 依次按自左至右的字段顺序排序 无法排序
FROM WHERE GROUP BY ORDER BY
SELECT FROM WHERE ORDER BY
依次按自右至左的字段顺序排序 只按第一个字段排序 依次按自左至右的字段顺序排序 无法排序