{"id":217805,"date":"2023-12-23T00:33:29","date_gmt":"2023-12-22T16:33:29","guid":{"rendered":"https:\/\/www.idc.net\/help\/217805\/"},"modified":"2023-12-23T00:33:29","modified_gmt":"2023-12-22T16:33:29","slug":"mysql%e4%bd%bf%e7%94%a8%e6%89%8b%e5%86%8c%ef%bc%9a%e4%bd%bf%e7%94%a8full-outer-join%e5%9c%a8%e5%b7%a6%e8%a1%a8%e6%88%96%e5%8f%b3%e8%a1%a8%e6%9c%89%e5%8c%b9%e9%85%8d%e6%97%b6%e8%bf%94%e5%9b%9e%e6%89%80","status":"publish","type":"post","link":"https:\/\/idc.net\/help\/217805\/","title":{"rendered":"MySQL\u4f7f\u7528\u624b\u518c\uff1a\u4f7f\u7528FULL OUTER JOIN\u5728\u5de6\u8868\u6216\u53f3\u8868\u6709\u5339\u914d\u65f6\u8fd4\u56de\u6240\u6709\u8bb0\u5f55"},"content":{"rendered":"<p><title id=\"mysql%e4%bd%bf%e7%94%a8%e6%89%8b%e5%86%8c%ef%bc%9a%e4%bd%bf%e7%94%a8full-outer-join%e5%9c%a8%e5%b7%a6%e8%a1%a8%e6%88%96%e5%8f%b3%e8%a1%a8%e6%9c%89%e5%8c%b9%e9%85%8d%e6%97%b6%e8%bf%94%e5%9b%9e%e6%89%80-wGjCVbZPJd\">MySQL\u4f7f\u7528\u624b\u518c\uff1a\u4f7f\u7528FULL OUTER JOIN\u5728\u5de6\u8868\u6216\u53f3\u8868\u6709\u5339\u914d\u65f6\u8fd4\u56de\u6240\u6709\u8bb0\u5f55<\/title><\/p>\n<h1 id=\"mysql%e4%bd%bf%e7%94%a8%e6%89%8b%e5%86%8c%ef%bc%9a%e4%bd%bf%e7%94%a8full-outer-join%e5%9c%a8%e5%b7%a6%e8%a1%a8%e6%88%96%e5%8f%b3%e8%a1%a8%e6%9c%89%e5%8c%b9%e9%85%8d%e6%97%b6%e8%bf%94%e5%9b%9e%e6%89%80-wGjCVbZPJd\">MySQL\u4f7f\u7528\u624b\u518c\uff1a\u4f7f\u7528FULL OUTER JOIN\u5728\u5de6\u8868\u6216\u53f3\u8868\u6709\u5339\u914d\u65f6\u8fd4\u56de\u6240\u6709\u8bb0\u5f55<\/h1>\n<p>\u5728MySQL\u4e2d\uff0cFULL OUTER JOIN\u662f\u4e00\u79cd\u8fde\u63a5\u4e24\u4e2a\u8868\u7684\u65b9\u6cd5\uff0c\u5b83\u8fd4\u56de\u5de6\u8868\u548c\u53f3\u8868\u4e2d\u6240\u6709\u5339\u914d\u548c\u4e0d\u5339\u914d\u7684\u8bb0\u5f55\u3002\u5f53\u5de6\u8868\u6216\u53f3\u8868\u6709\u5339\u914d\u65f6\uff0cFULL OUTER JOIN\u4f1a\u8fd4\u56de\u6240\u6709\u8bb0\u5f55\u3002<\/p>\n<h2 id=\"%e8%af%ad%e6%b3%95-wGjCVbZPJd\">\u8bed\u6cd5<\/h2>\n<p>\u4f7f\u7528FULL OUTER JOIN\u7684\u8bed\u6cd5\u5982\u4e0b\uff1a<\/p>\n<pre><code>SELECT column_name(s)\nFROM table1\nFULL OUTER JOIN table2\nON table1.column_name = table2.column_name;<\/code><\/pre>\n<h2 id=\"%e7%a4%ba%e4%be%8b-wGjCVbZPJd\">\u793a\u4f8b<\/h2>\n<p>\u5047\u8bbe\u6211\u4eec\u6709\u4e24\u4e2a\u8868\uff1aCustomers\u548cOrders\u3002Customers\u8868\u5305\u542b\u5ba2\u6237\u7684\u4fe1\u606f\uff0cOrders\u8868\u5305\u542b\u8ba2\u5355\u7684\u4fe1\u606f\u3002\u6211\u4eec\u60f3\u8981\u83b7\u53d6\u6240\u6709\u5ba2\u6237\u548c\u8ba2\u5355\u7684\u4fe1\u606f\uff0c\u5305\u62ec\u6ca1\u6709\u8ba2\u5355\u7684\u5ba2\u6237\u548c\u6ca1\u6709\u5ba2\u6237\u7684\u8ba2\u5355\u3002<\/p>\n<p>Customers\u8868\u7684\u7ed3\u6784\u5982\u4e0b\uff1a<\/p>\n<pre><code>+----+----------+\n| id | name     |\n+----+----------+\n| 1  | John     |\n| 2  | Mary     |\n| 3  | David    |\n+----+----------+<\/code><\/pre>\n<p>Orders\u8868\u7684\u7ed3\u6784\u5982\u4e0b\uff1a<\/p>\n<pre><code>+----+------------+\n| id | order_date |\n+----+------------+\n| 1  | 2021-01-01 |\n| 2  | 2021-02-01 |\n+----+------------+<\/code><\/pre>\n<p>\u4f7f\u7528FULL OUTER JOIN\u67e5\u8be2\u6240\u6709\u5ba2\u6237\u548c\u8ba2\u5355\u7684\u4fe1\u606f\uff1a<\/p>\n<pre><code>SELECT Customers.name, Orders.order_date\nFROM Customers\nFULL OUTER JOIN Orders\nON Customers.id = Orders.id;<\/code><\/pre>\n<p>\u67e5\u8be2\u7ed3\u679c\u5982\u4e0b\uff1a<\/p>\n<pre><code>+------+------------+\n| name | order_date |\n+------+------------+\n| John | 2021-01-01 |\n| Mary | 2021-02-01 |\n| David| NULL       |\n+------+------------+<\/code><\/pre>\n<p>\u5728\u4e0a\u9762\u7684\u67e5\u8be2\u7ed3\u679c\u4e2d\uff0c\u6211\u4eec\u53ef\u4ee5\u770b\u5230\u6240\u6709\u5ba2\u6237\u7684\u4fe1\u606f\u90fd\u88ab\u8fd4\u56de\uff0c\u5305\u62ec\u6ca1\u6709\u8ba2\u5355\u7684\u5ba2\u6237\uff08David\uff09\uff0c\u4ee5\u53ca\u6240\u6709\u8ba2\u5355\u7684\u4fe1\u606f\uff0c\u5305\u62ec\u6ca1\u6709\u5ba2\u6237\u7684\u8ba2\u5355\u3002<\/p>\n<h2 id=\"%e6%80%bb%e7%bb%93-wGjCVbZPJd\">\u603b\u7ed3<\/h2>\n<p>\u901a\u8fc7\u4f7f\u7528FULL OUTER JOIN\uff0c\u6211\u4eec\u53ef\u4ee5\u5728\u5de6\u8868\u6216\u53f3\u8868\u6709\u5339\u914d\u65f6\u8fd4\u56de\u6240\u6709\u8bb0\u5f55\u3002\u8fd9\u5bf9\u4e8e\u9700\u8981\u83b7\u53d6\u4e24\u4e2a\u8868\u4e2d\u6240\u6709\u6570\u636e\u7684\u60c5\u51b5\u975e\u5e38\u6709\u7528\u3002<\/p>\n<p>\u5982\u679c\u60a8\u6b63\u5728\u5bfb\u627e\u53ef\u9760\u7684\u4e91\u8ba1\u7b97\u670d\u52a1\u63d0\u4f9b\u5546\uff0c\u540e\u6d6a\u4e91\u662f\u60a8\u7684\u9996\u9009\u3002\u6211\u4eec\u63d0\u4f9b\u9999\u6e2f\u670d\u52a1\u5668\u3001\u7f8e\u56fd\u670d\u52a1\u5668\u548c\u4e91\u670d\u52a1\u5668\u7b49\u591a\u79cd\u4ea7\u54c1\uff0c\u4ee5\u6ee1\u8db3\u4e0d\u540c\u5ba2\u6237\u7684\u9700\u6c42\u3002\u60a8\u53ef\u4ee5\u8bbf\u95ee\u6211\u4eec\u7684\u5b98\u7f51\u4e86\u89e3\u66f4\u591a\u4fe1\u606f\uff1a<a href=\"https:\/\/idc.net\">https:\/\/idc.net<\/a>\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>MySQL\u4f7f\u7528\u624b\u518c\uff1a\u4f7f\u7528FULL OUTER JOIN\u5728\u5de6\u8868\u6216\u53f3\u8868\u6709\u5339\u914d\u65f6\u8fd4\u56de\u6240\u6709\u8bb0\u5f55 MySQL\u4f7f\u7528\u624b\u518c\uff1a\u4f7f [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[197851],"tags":[],"class_list":["post-217805","post","type-post","status-publish","format-standard","hentry","category-php"],"_links":{"self":[{"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/posts\/217805","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/comments?post=217805"}],"version-history":[{"count":0,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/posts\/217805\/revisions"}],"wp:attachment":[{"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/media?parent=217805"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/categories?post=217805"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/tags?post=217805"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}