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[db] others #26

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Alice52 opened this issue Sep 26, 2021 · 0 comments

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Alice52 commented Sep 26, 2021 •

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可以使用关联子查询去重

DELETE FROM Products P1
WHERE id < ( 
      SELECT MAX(P2.id) 
      FROM Products P2 
      WHERE P1.name = P2.name AND P1.price = P2.price
);

去重- groupby-max+delete

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Alice52 transferred this issue from Alice52/java-ocean

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