ã¢ããªã±ã¼ã·ã§ã³ä¸ã§ãªã«ãã¨ã³ããªï¼ä¾ãã°è¨äºã ã¨ãã¦ã¼ã¶ã ã¨ãï¼ãåé¤ããã¨ããDBä¸ã®è¡ã¯åé¤ããåã«ãåé¤æ¸ã¿ããã©ã°ãç«ã¦ãã ãã¨ããæ±ãæ¹ã è«çåé¤ ã¨å¼ã³ã¾ãã è«çåé¤ã«ã¯ãããããªã¡ãªãããããã¾ããè¡åé¤ã®ããã«é¢é£ããä»ãã¼ãã«ã¸åé¤ãæ³¢åããªããã¨ãã¨ã³ããªå¾©æ´»ãã§ãããã¨ãé害æã«ãã¼ã¿å¤æ´ã®çµç·¯ã追ãããããªããã¨ãªã©ãªã©ï¼ãã¡ãªããããããããããã§ããããã®è¨äºã®ä¸»æ¨ããã¯ã¯ãããã®ã§å¥éã調ã¹ãã ããï¼ã ã¨ãããè«çåé¤ã®æ¹éã§DBãçµãã§ãã¦å°ã£ããã¨ã¯ããã¾ãããï¼ ã ã¡ã¼ã«ã¢ãã¬ã¹ã¯ä¸ææ§(UNIQUE)å¶ç´ãããããã®ã«ãããã ã¨åé¤æ¸ã¿ã®ã¦ã¼ã¶ã¨åãã¡ã¼ã«ã¢ãã¬ã¹ã使ããªããã¨ã«ãªã ã è«çåé¤ã¨ä¸ææ§å¶ç´ã両ç«ã¯ã§ããªãã®ãï¼ ã§ããªãã¨æã£ã¦ããæ¹ãå¤ãã¨æãã¾ããå®ã¯ã¡ããã¨ã§ãã¾ããDB製åã«ãã£ã¦å®ç¾æ¹æ³ãã¡ãã£ã¨éã£ã¦ããã ãã§
{{#tags}}- {{label}}
{{/tags}}