7. 代表çãªã¯ã¨ãªã®ã¿ã¤ã ï ANDæ¤ç´¢ (Conjunctive query) ï ã¯ã¨ãªï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ = (������1 , ⦠, ������������ )ãä¸ããããæã«å ¨ã¦ã®ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ ãå«ã¾ããæç« ãè¿ã ï ä¾ : ������ = (������������������������â, ������������������, ������������������������������)ãªãã°âwatchâ, âiwcâ, ârolexâå ¨ã¦ãå«ã¾ããæç« ãè¿ã ï ORæ¤ç´¢ (Disjunctive query) ï ã¯ã¨ãªï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ = (������1 , ⦠, ������������ )ãä¸ããããæã«ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ï¿½ ã®ãã ãããå«ã¾ããæç« ãè¿ã ï ä¾ : ������ = (����������������������
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