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Jun 22nd, 2016
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MySQL 0.21 KB | None | 0 0
  1. SELECT A.月, gb.sum, gc.sum
  2. FROM
  3.     A,
  4.     (SELECT 月, SUM(金額) AS sum FROM B GROUP BY 月) AS gb,
  5.     (SELECT 月, SUM(金額) AS sum FROM C GROUP BY 月) AS gc
  6. WHERE A.月 = gb.月 AND A.月 = gc.月
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