{"id":419209,"date":"2021-03-24T21:07:39","date_gmt":"2021-03-24T13:07:39","guid":{"rendered":"http:\/\/4563.org\/?p=419209"},"modified":"2021-03-24T21:07:39","modified_gmt":"2021-03-24T13:07:39","slug":"%e6%95%b0%e6%8d%ae%e5%ba%93%e7%9a%84%e4%b8%80%e5%bc%a0%e8%a1%a8%e5%8f%aa%e6%9c%89%e4%b8%a4%e4%b8%aa%e5%ad%97%e6%ae%b5-%e5%b9%b6%e4%b8%94%e4%b8%bb%e9%94%ae%e5%8c%85%e6%8b%ac%e8%bf%99%e4%b8%a4%e4%b8%aa","status":"publish","type":"post","link":"http:\/\/4563.org\/?p=419209","title":{"rendered":"\u6570\u636e\u5e93\u7684\u4e00\u5f20\u8868\u53ea\u6709\u4e24\u4e2a\u5b57\u6bb5, \u5e76\u4e14\u4e3b\u952e\u5305\u62ec\u8fd9\u4e24\u4e2a\u5b57\u6bb5, \u4e0d\u6ee1\u8db3\u7b2c\u51e0\u8303\u5f0f?"},"content":{"rendered":"
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\u6570\u636e\u5e93\u7684\u4e00\u5f20\u8868\u53ea\u6709\u4e24\u4e2a\u5b57\u6bb5, \u5e76\u4e14\u4e3b\u952e\u5305\u62ec\u8fd9\u4e24\u4e2a\u5b57\u6bb5, \u4e0d\u6ee1\u8db3\u7b2c\u51e0\u8303\u5f0f? <\/h1>\n

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\u8cc7\u6df1\u5927\u4f6c : 919615766 <\/span> <\/i> 2<\/span> <\/div>\n
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CREATE TABLE user (   \"SSN\" varchar(255) NOT NULL,   \"LANGUAGE\" varchar(255)  NOT NULL,   PRIMARY KEY (\"SSN\", \"LANGUAGE\") ) <\/code><\/pre>\n\n\n\n\n\n\n\n\n\n\n
SSN<\/th>\nLANGUAGE<\/th>\n<\/tr>\n<\/thead>\n
1<\/td>\nenglish<\/td>\n<\/tr>\n
1<\/td>\nchinese<\/td>\n<\/tr>\n
1<\/td>\nspanish<\/td>\n<\/tr>\n
2<\/td>\nenglish<\/td>\n<\/tr>\n
2<\/td>\nspanish<\/td>\n<\/tr>\n
3<\/td>\nenglish<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
\u5982\u9898, \u6bd4\u5982\u8fd9\u6837\u4e00\u4e2a\u8868, \u4e3b\u952e\u5305\u62ec SSN \u548c LANGUAGE \u4e24\u4e2a\u5b57\u6bb5, \u8fd9\u4e0d\u6ee1\u8db3\u7b2c\u51e0\u8303\u5f0f?<\/p>\n<\/p><\/div>\n
 \u5927\u4f6c\u6709\u8a71\u8aaa<\/b> (6<\/span>)        <\/div>\n
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     \u8cc7\u6df1\u5927\u4f6c : epicSoldier <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 \u60a8\u597d\uff0c\u9898\u76ee\u8bf7\u81ea\u5df1\u505a                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
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     \u8cc7\u6df1\u5927\u4f6c : dilu <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 \u60a8\u597d\uff0c\u9898\u76ee\u8bf7\u81ea\u5df1\u505a                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
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     \u8cc7\u6df1\u5927\u4f6c : laimailai <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 \u60a8\u597d\uff0c\u9898\u76ee\u8bf7\u81ea\u5df1\u505a                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
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     \u8cc7\u6df1\u5927\u4f6c : tabris17 <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 \u6211\u731c\u662f\u8fdd\u53cd\u4e86\u7b2c\u4e8c\u5341\u4e00\u8303\u5f0f                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
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     \u8cc7\u6df1\u5927\u4f6c : AllenHua <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 \u6211\u4e0d\u61c2\uff0c\u4f46\u662f\u4e0d\u660e\u767d\u8fd9\u5f20\u8868\u7684\u610f\u4e49\u5728\u54ea                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
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     \u8cc7\u6df1\u5927\u4f6c : RiceMarch <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 \u7b2c\u4e00\u8303\u5f0f\uff08 1NF \uff09:\u5217\u4e0d\u53ef\u518d\u5206<\/p>\n
    \u7b2c\u4e8c\u8303\u5f0f\uff08 2NF \uff09\u5c5e\u6027\u5b8c\u5168\u4f9d\u8d56\u4e8e\u4e3b\u952e<\/p>\n
    \u7b2c\u4e09\u8303\u5f0f\uff08 3NF \uff09\u5c5e\u6027\u4e0d\u4f9d\u8d56\u4e8e\u5176\u5b83\u975e\u4e3b\u5c5e\u6027,\u5c5e\u6027\u76f4\u63a5\u4f9d\u8d56\u4e8e\u4e3b\u952e<\/p>\n
    BCNF \u5728 3NF \u57fa\u7840\u4e0a\uff0c\u4efb\u4f55\u975e\u4e3b\u5c5e\u6027\u4e0d\u80fd\u5bf9\u4e3b\u952e\u5b50\u96c6\u4f9d\u8d56                                                            <\/p><\/div>\n<\/p><\/div>\n<\/li>\n
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    \u6570\u636e\u5e93\u7684\u4e00\u5f20\u8868\u53ea\u6709\u4e24\u4e2a\u5b57\u6bb5, \u5e76\u4e14…<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[],"tags":[],"_links":{"self":[{"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/posts\/419209"}],"collection":[{"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=419209"}],"version-history":[{"count":0,"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/posts\/419209\/revisions"}],"wp:attachment":[{"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=419209"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=419209"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=419209"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}