{"id":53,"date":"2020-12-28T19:16:05","date_gmt":"2020-12-28T11:16:05","guid":{"rendered":"https:\/\/www.52dixiaowo.com\/database\/?p=53"},"modified":"2021-09-09T16:21:28","modified_gmt":"2021-09-09T08:21:28","slug":"%e5%a4%9a%e8%a1%a8%e5%85%b3%e7%b3%bb","status":"publish","type":"post","link":"https:\/\/www.52dixiaowo.com\/db\/post-53.html","title":{"rendered":"SQL \u591a\u8868\u5173\u7cfb"},"content":{"rendered":"\n<h5 class=\"has-text-align-center\">\u4e00\u5bf9\u4e00\u5173\u7cfb<\/h5>\n\n\n\n<p>\u4efb\u4e00\u8868\u7684\u4e3b\u952e\u4f5c\u4e3a\u53e6\u4e00\u4e2a\u8868\u7684\u5916\u952e\uff0c\uff08\u6216\u8005\u76f4\u63a5\u5408\u5e76\u4e3a\u4e00\u5f20\u8868\uff09<\/p>\n\n\n\n<p class=\"has-text-align-center\">\u8868\u4e00\uff1a\u5b66\u751f\u8868student, \u5b66\u53f7\uff0c\u59d3\u540d\uff0c\u5e74\u9f84<\/p>\n\n\n\n<figure class=\"wp-block-table is-style-stripes\"><table><tbody><tr><td>id<\/td><td>name<\/td><td>age<\/td><td>cid<\/td><\/tr><tr><td>1<\/td><td>\u5f20\u4e09<\/td><td>38<\/td><td>1<\/td><\/tr><tr><td>2<\/td><td>\u674e\u56db<\/td><td>99<\/td><td>2<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"has-text-align-center\">\u8868\u4e8c\uff1a\u8eab\u4efd\u8bc1\u8868card\uff0c\u8868id\uff0c\u8eab\u4efd\u8bc1\u53f7<\/p>\n\n\n\n<figure class=\"wp-block-table is-style-stripes\"><table><tbody><tr><td>id<\/td><td>number<\/td><\/tr><tr><td>1<\/td><td>423537261534<\/td><\/tr><tr><td>2<\/td><td>472895623897<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p>\u4e00\u4e2a\u5b66\u751f\u5bf9\u5e94\u4e00\u4e2a\u8eab\u4efd\u8bc1\uff0c\u4e00\u4e2a\u8eab\u4efd\u8bc1\u5bf9\u5e94\u4e00\u4e2a\u5b66\u751f<\/p>\n\n\n\n<p>\u53ef\u4ee5\u5728\u4efb\u610f\u7684\u4e00\u65b9\uff0c\u6dfb\u52a0\u5916\u952e\u6307\u5411\u53e6\u4e00\u65b9\u7684\u4e3b\u952e<\/p>\n\n\n\n<p>(\u8981\u4fdd\u8bc1\u6bcf\u4e2a cid \u662f\u552f\u4e00\u7684\uff0cnumber\u662f\u552f\u4e00\u7684\uff0c\u9700\u8981\u6dfb\u52a0 unique \u552f\u4e00\u7ea6\u675f\uff09<\/p>\n\n\n\n<p>\u5982\u679c\u6ca1\u7279\u6b8a\u9650\u5236\uff0c\u53ef\u4ee5\u76f4\u63a5\u628a\u8eab\u4efd\u8bc1\u53f7\uff0c\u5408\u5e76\u5230 student \u8868\u4e2d\uff0c\u66f4\u65b9\u4fbf<\/p>\n\n\n\n<h5 class=\"has-text-align-center\">\u4e00\u5bf9\u591a\u5173\u7cfb<\/h5>\n\n\n\n<p>\u4e3b\u952e\u5728\u201c\u4e00\u201d\u7684\u90a3\u65b9\uff0c\u591a\u7684\u4e00\u65b9\u4f7f\u7528\u5916\u952e\u5f15\u7528\u201c\u4e00\u201d\u7684\u4e3b\u952e<\/p>\n\n\n\n<p class=\"has-text-align-center\">\u8868\u4e00\uff1a\u90e8\u95e8\u8868dep\uff0c\u6709\u90e8\u95e8 id \uff0c\u548c\u90e8\u95e8\u540d\u79f0<\/p>\n\n\n\n<figure class=\"wp-block-table is-style-stripes\"><table><tbody><tr><td>did<\/td><td>name<\/td><\/tr><tr><td>1<\/td><td>\u8d22\u52a1\u90e8<\/td><\/tr><tr><td>2<\/td><td>\u9500\u552e\u90e8<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"has-text-align-center\">\u88682\uff1a\u5458\u5de5\u8868emp\uff0c\u6709\u5458\u5de5id\uff0c\u59d3\u540d\uff0c\u5e74\u9f84\uff0c\u90e8\u95e8id<\/p>\n\n\n\n<figure class=\"wp-block-table is-style-stripes\"><table><tbody><tr><td>eid<\/td><td>name<\/td><td>age<\/td><td>dep_id<\/td><\/tr><tr><td>1<\/td><td>\u5f20\u4e09<\/td><td>18<\/td><td>2<\/td><\/tr><tr><td>2<\/td><td>\u674e\u56db<\/td><td>19<\/td><td>1<\/td><\/tr><tr><td>3<\/td><td>\u738b\u4e94<\/td><td>20<\/td><td>2<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p>\u4e00\u4e2a\u5458\u5de5\u53ea\u6709\u4e00\u4e2a\u90e8\u95e8\uff0c\u4e00\u4e2a\u90e8\u95e8\u6709\u591a\u4e2a\u5458\u5de5\u3002\u4e5f\u5c31\u662f\u8bf4\uff0c\u591a\u4e2a\u5458\u5de5\u5bf9\u5e94\u4e00\u4e2a\u90e8\u95e8<\/p>\n\n\n\n<p>\u6211\u4eec\u5728\u201c\u4e00\u201d\u7684\u4e00\u65b9\uff08\u90e8\u95e8\uff09\u5efa\u7acb\u4e3b\u952e\uff0c\u591a\u7684\u4e00\u65b9\u5f15\u7528\u5916\u952edep_id\uff08\u5458\u5de5\uff09<\/p>\n\n\n\n<h5 class=\"has-text-align-center\">\u591a\u5bf9\u591a\u5173\u7cfb<\/h5>\n\n\n\n<p>\u591a\u5bf9\u591a\u5173\u7cfb\uff0c\u901a\u5e38\u9700\u8981\u501f\u52a9\u4e2d\u95f4\u8868\uff0c\u5b9e\u73b0\u5c5e\u6027\u7684\u5bf9\u63a5<\/p>\n\n\n\n<p class=\"has-text-align-center\">\u8868\u4e00\uff1a\u5b66\u751f\u8868student\uff0c\u5b66\u53f7sid\uff0c\u59d3\u540d\uff0c\u5e74\u9f84<\/p>\n\n\n\n<figure class=\"wp-block-table is-style-stripes\"><table><tbody><tr><td>sid<\/td><td>name<\/td><td>age<\/td><\/tr><tr><td>1<\/td><td>\u5f20\u4e09<\/td><td>17<\/td><\/tr><tr><td>2<\/td><td>\u674e\u56db<\/td><td>28<\/td><\/tr><tr><td>3<\/td><td>\u738b\u4e94<\/td><td>49<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"has-text-align-center\">\u8868\u4e8c\uff1a\u8bfe\u7a0b\u8868class\uff0c\u8bfe\u7a0b\u53f7cid\uff0c\u8bfe\u7a0b\u540d\u79f0<\/p>\n\n\n\n<figure class=\"wp-block-table is-style-stripes\"><table><tbody><tr><td>cid<\/td><td>name<\/td><\/tr><tr><td>1<\/td><td>\u82f1\u8bed<\/td><\/tr><tr><td>2<\/td><td>\u6570\u5b66<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p>\u4e00\u4e2a\u5b66\u751f\u53ef\u4ee5\u9009\u62e9\u591a\u4eec\u8bfe\u7a0b\uff0c\u4e00\u4e2a\u8bfe\u7a0b\u53ef\u4ee5\u6709\u591a\u4e2a\u5b66\u751f\uff0c\u6240\u4ee5\u662f\u591a\u5bf9\u591a\u5173\u7cfb<\/p>\n\n\n\n<p>\u6211\u4eec\u9700\u8981\u501f\u52a9\u4e00\u5f20\u6216\u591a\u5f20\u4e2d\u95f4\u8868\uff0c\u5982\u8fd9\u91cc\u589e\u52a0\u4e00\u4e2a\u9009\u8bfe\u8868<\/p>\n\n\n\n<p class=\"has-text-align-center\">\u8868\u4e09\uff1aselect\uff0c\u5206\u522b\u5305\u542b2\u5f20\u8868\u7684\u4e3b\u952e\uff0c\u5b66\u53f7\u548c\u8bfe\u7a0b\u53f7<\/p>\n\n\n\n<figure class=\"wp-block-table is-style-stripes\"><table><tbody><tr><td>sid<\/td><td>cid<\/td><\/tr><tr><td>1<\/td><td>1<\/td><\/tr><tr><td>1<\/td><td>2<\/td><\/tr><tr><td>2<\/td><td>2<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p>\uff08\u6ce8\u610f\uff1a\u8fd9\u91cc\u7684\u9009\u8bfe\u8868\u6bd4\u8f83\u7b80\u5355\uff0c\u5e94\u8be5\u8981\u4fdd\u8bc1\u6bcf\u4e2a\u5b57\u6bb5\u662f\u552f\u4e00\u7684\uff09<\/p>\n\n\n\n<p>\uff08\u53ef\u4ee5\u628a\u5b66\u53f7\u548c\u9009\u8bfe\u53f7\u4f5c\u4e3a\u8054\u5408\u4e3b\u952e\uff0c\u786e\u4fdd\u975e\u7a7a\u548c\u907f\u514d\u91cd\u590d\uff09<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4e00\u5bf9\u4e00\u5173\u7cfb \u4efb\u4e00\u8868\u7684\u4e3b\u952e\u4f5c\u4e3a\u53e6\u4e00\u4e2a\u8868\u7684\u5916\u952e\uff0c\uff08\u6216\u8005\u76f4\u63a5\u5408\u5e76\u4e3a\u4e00\u5f20\u8868\uff09 \u8868\u4e00\uff1a\u5b66\u751f\u8868student, \u5b66\u53f7\uff0c\u59d3\u540d&hellip; <a href=\"https:\/\/www.52dixiaowo.com\/db\/post-53.html\" class=\"more-link\">\u7ee7\u7eed\u9605\u8bfb <span class=\"screen-reader-text\">SQL \u591a\u8868\u5173\u7cfb<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[4],"tags":[],"_links":{"self":[{"href":"https:\/\/www.52dixiaowo.com\/db\/wp-json\/wp\/v2\/posts\/53"}],"collection":[{"href":"https:\/\/www.52dixiaowo.com\/db\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.52dixiaowo.com\/db\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.52dixiaowo.com\/db\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.52dixiaowo.com\/db\/wp-json\/wp\/v2\/comments?post=53"}],"version-history":[{"count":4,"href":"https:\/\/www.52dixiaowo.com\/db\/wp-json\/wp\/v2\/posts\/53\/revisions"}],"predecessor-version":[{"id":62,"href":"https:\/\/www.52dixiaowo.com\/db\/wp-json\/wp\/v2\/posts\/53\/revisions\/62"}],"wp:attachment":[{"href":"https:\/\/www.52dixiaowo.com\/db\/wp-json\/wp\/v2\/media?parent=53"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.52dixiaowo.com\/db\/wp-json\/wp\/v2\/categories?post=53"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.52dixiaowo.com\/db\/wp-json\/wp\/v2\/tags?post=53"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}