å ¥ãåéåã¢ãã«ã«ãããæ¤ç´¢ ã«ã¼ãã¨ãªã¼ããæ±ãã ã¾ãå ¥ãåéåã®æ¤ç´¢ã§åºæ¬ã¨ãªãèãæ¹ãç解ãã¾ããããããã¯ãå å«é¢ä¿ã調ã¹ãããã¨ã§ãã ãã¨ãã°ãã«ã¼ãï¼ããã§è¨ã足ç«ç¤¾é·ï¼ã¨ãªã¼ãï¼çªç©ãæ¨å³¶æ°ãï¼ãæ±ãããã¨ãèãã¾ãããªã¼ãã®åã¯ãèªåã®ä¸ã«ä¸ä½ã®åãä¸ã¤ãå«ã¾ãªãã¨ããç¹æ§ãæã¡ã¾ãããããã£ã¦ãNOT EXISTSã«ãã£ã¦è¡¨ç¾ã§ãã¾ãï¼ãªã¹ã1ãå³5â ï¼â ã ãªã¹ã1ããªã¼ãã®åãæ±ãã SELECT * FROM OrgChart Boss WHERE NOT EXISTS (SELECT * FROM OrgChart Workers WHERE Workers.lft > Boss.lft AND Workers.lft < Boss.rgt); å³5ããªã¹ã1ã®å®è¡çµæ

{{#tags}}- {{label}}
{{/tags}}