{"id":61035,"date":"2024-10-13T07:53:13","date_gmt":"2024-10-12T23:53:13","guid":{"rendered":"https:\/\/server.hk\/cnblog\/61035\/"},"modified":"2024-10-13T07:53:13","modified_gmt":"2024-10-12T23:53:13","slug":"dba%e6%8a%80%e8%a1%93%e5%88%86%e4%ba%ab-mysql%e4%b8%89%e5%80%8b%e9%97%9c%e6%96%bc%e4%b8%bb%e9%8d%b5primarykeys%e7%9a%84%e6%9f%a5%e8%a9%a2","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/61035\/","title":{"rendered":"DBA\u6280\u8853\u5206\u4eab&#8211;MySQL\u4e09\u500b\u95dc\u65bc\u4e3b\u9375PrimaryKeys\u7684\u67e5\u8a62"},"content":{"rendered":"<h1 id=\"dba%e6%8a%80%e8%a1%93%e5%88%86%e4%ba%ab-mysql%e4%b8%89%e5%80%8b%e9%97%9c%e6%96%bc%e4%b8%bb%e9%8d%b5primary-keys%e7%9a%84%e6%9f%a5%e8%a9%a2-GjqjGiJpVv\">DBA\u6280\u8853\u5206\u4eab&#8211;MySQL\u4e09\u500b\u95dc\u65bc\u4e3b\u9375Primary Keys\u7684\u67e5\u8a62<\/h1>\n<p>\u5728\u8cc7\u6599\u5eab\u7ba1\u7406\u4e2d\uff0c\u4e3b\u9375\uff08Primary Key\uff09\u662f\u6bcf\u500b\u8cc7\u6599\u8868\u4e2d\u4e0d\u53ef\u6216\u7f3a\u7684\u91cd\u8981\u5143\u7d20\u3002\u5b83\u4e0d\u50c5\u7528\u65bc\u552f\u4e00\u6a19\u8b58\u6bcf\u4e00\u884c\u8cc7\u6599\uff0c\u9084\u5728\u8cc7\u6599\u5eab\u7684\u5b8c\u6574\u6027\u548c\u6027\u80fd\u65b9\u9762\u626e\u6f14\u8457\u95dc\u9375\u89d2\u8272\u3002\u672c\u6587\u5c07\u63a2\u8a0e\u4e09\u500b\u95dc\u65bcMySQL\u4e3b\u9375\u7684\u67e5\u8a62\uff0c\u5e6b\u52a9DBA\u66f4\u597d\u5730\u7406\u89e3\u548c\u4f7f\u7528\u4e3b\u9375\u3002<\/p>\n<h2 id=\"%e4%bb%80%e9%ba%bc%e6%98%af%e4%b8%bb%e9%8d%b5%ef%bc%9f-GjqjGiJpVv\">\u4ec0\u9ebc\u662f\u4e3b\u9375\uff1f<\/h2>\n<p>\u4e3b\u9375\u662f\u4e00\u500b\u6216\u591a\u500b\u6b04\u4f4d\u7684\u7d44\u5408\uff0c\u5176\u503c\u5728\u8cc7\u6599\u8868\u4e2d\u5fc5\u9808\u662f\u552f\u4e00\u7684\uff0c\u4e26\u4e14\u4e0d\u80fd\u70ba\u7a7a\u3002\u4e3b\u9375\u7684\u4e3b\u8981\u529f\u80fd\u662f\u78ba\u4fdd\u8cc7\u6599\u7684\u552f\u4e00\u6027\u548c\u5b8c\u6574\u6027\u3002\u6bcf\u500b\u8cc7\u6599\u8868\u53ea\u80fd\u6709\u4e00\u500b\u4e3b\u9375\uff0c\u4f46\u4e3b\u9375\u53ef\u4ee5\u7531\u591a\u500b\u6b04\u4f4d\u7d44\u6210\uff0c\u9019\u7a31\u70ba\u8907\u5408\u4e3b\u9375\u3002<\/p>\n<h2 id=\"%e6%9f%a5%e8%a9%a2%e4%b8%80%ef%bc%9a%e6%aa%a2%e6%9f%a5%e4%b8%bb%e9%8d%b5%e7%9a%84%e5%ad%98%e5%9c%a8%e6%80%a7-GjqjGiJpVv\">\u67e5\u8a62\u4e00\uff1a\u6aa2\u67e5\u4e3b\u9375\u7684\u5b58\u5728\u6027<\/h2>\n<p>\u5728\u8a2d\u8a08\u8cc7\u6599\u8868\u6642\uff0c\u78ba\u4fdd\u4e3b\u9375\u7684\u5b58\u5728\u662f\u975e\u5e38\u91cd\u8981\u7684\u3002\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0bSQL\u67e5\u8a62\u4f86\u6aa2\u67e5\u67d0\u500b\u8cc7\u6599\u8868\u662f\u5426\u5df2\u7d93\u8a2d\u7f6e\u4e86\u4e3b\u9375\uff1a<\/p>\n<pre><code>SHOW KEYS FROM your_table_name WHERE Key_name = 'PRIMARY';<\/code><\/pre>\n<p>\u9019\u689d\u67e5\u8a62\u5c07\u8fd4\u56de\u8a72\u8cc7\u6599\u8868\u4e2d\u4e3b\u9375\u7684\u76f8\u95dc\u8cc7\u8a0a\u3002\u5982\u679c\u8fd4\u56de\u7d50\u679c\u70ba\u7a7a\uff0c\u5247\u8868\u793a\u8a72\u8cc7\u6599\u8868\u5c1a\u672a\u8a2d\u7f6e\u4e3b\u9375\u3002<\/p>\n<h2 id=\"%e6%9f%a5%e8%a9%a2%e4%ba%8c%ef%bc%9a%e6%9f%a5%e8%a9%a2%e4%b8%bb%e9%8d%b5%e7%9a%84%e8%a9%b3%e7%b4%b0%e8%b3%87%e8%a8%8a-GjqjGiJpVv\">\u67e5\u8a62\u4e8c\uff1a\u67e5\u8a62\u4e3b\u9375\u7684\u8a73\u7d30\u8cc7\u8a0a<\/h2>\n<p>\u5982\u679c\u9700\u8981\u7372\u53d6\u4e3b\u9375\u7684\u8a73\u7d30\u8cc7\u8a0a\uff0c\u4f8b\u5982\u4e3b\u9375\u6240\u5305\u542b\u7684\u6b04\u4f4d\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u67e5\u8a62\uff1a<\/p>\n<pre><code>SELECT COLUMN_NAME \nFROM INFORMATION_SCHEMA.KEY_COLUMN_USAGE \nWHERE TABLE_NAME = 'your_table_name' AND CONSTRAINT_NAME = 'PRIMARY';<\/code><\/pre>\n<p>\u9019\u689d\u67e5\u8a62\u5c07\u8fd4\u56de\u4e3b\u9375\u6240\u5305\u542b\u7684\u6240\u6709\u6b04\u4f4d\u540d\u7a31\uff0c\u5e6b\u52a9DBA\u4e86\u89e3\u4e3b\u9375\u7684\u7d50\u69cb\u3002<\/p>\n<h2 id=\"%e6%9f%a5%e8%a9%a2%e4%b8%89%ef%bc%9a%e6%9f%a5%e8%a9%a2%e4%b8%bb%e9%8d%b5%e7%9a%84%e4%bd%bf%e7%94%a8%e6%83%85%e6%b3%81-GjqjGiJpVv\">\u67e5\u8a62\u4e09\uff1a\u67e5\u8a62\u4e3b\u9375\u7684\u4f7f\u7528\u60c5\u6cc1<\/h2>\n<p>\u4e86\u89e3\u4e3b\u9375\u5728\u8cc7\u6599\u8868\u4e2d\u7684\u4f7f\u7528\u60c5\u6cc1\u5c0d\u65bc\u6027\u80fd\u512a\u5316\u81f3\u95dc\u91cd\u8981\u3002\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u67e5\u8a62\u4f86\u6aa2\u67e5\u67d0\u500b\u4e3b\u9375\u7684\u4f7f\u7528\u60c5\u6cc1\uff1a<\/p>\n<pre><code>SELECT COUNT(*) AS total_rows \nFROM your_table_name \nWHERE your_primary_key_column IS NOT NULL;<\/code><\/pre>\n<p>\u9019\u689d\u67e5\u8a62\u5c07\u8fd4\u56de\u8cc7\u6599\u8868\u4e2d\u4e3b\u9375\u6b04\u4f4d\u7684\u975e\u7a7a\u884c\u6578\uff0c\u5e6b\u52a9DBA\u8a55\u4f30\u4e3b\u9375\u7684\u6709\u6548\u6027\u548c\u5b8c\u6574\u6027\u3002<\/p>\n<h2 id=\"%e7%b5%90%e8%ab%96-GjqjGiJpVv\">\u7d50\u8ad6<\/h2>\n<p>\u4e3b\u9375\u5728MySQL\u8cc7\u6599\u5eab\u4e2d\u626e\u6f14\u8457\u81f3\u95dc\u91cd\u8981\u7684\u89d2\u8272\uff0c\u6b63\u78ba\u5730\u8a2d\u7f6e\u548c\u7ba1\u7406\u4e3b\u9375\u4e0d\u50c5\u80fd\u63d0\u9ad8\u8cc7\u6599\u7684\u5b8c\u6574\u6027\uff0c\u9084\u80fd\u63d0\u5347\u67e5\u8a62\u6027\u80fd\u3002\u900f\u904e\u4e0a\u8ff0\u4e09\u500b\u67e5\u8a62\uff0cDBA\u53ef\u4ee5\u66f4\u6709\u6548\u5730\u6aa2\u67e5\u548c\u7ba1\u7406\u4e3b\u9375\uff0c\u78ba\u4fdd\u8cc7\u6599\u5eab\u7684\u5065\u5eb7\u904b\u884c\u3002<\/p>\n<p>\u5982\u9700\u9032\u4e00\u6b65\u4e86\u89e3\u5982\u4f55\u512a\u5316\u60a8\u7684\u8cc7\u6599\u5eab\u74b0\u5883\uff0c\u60a8\u53ef\u4ee5\u8003\u616e\u4f7f\u7528<a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a>\u89e3\u6c7a\u65b9\u6848\uff0c\u9019\u5c07\u70ba\u60a8\u7684\u8cc7\u6599\u5eab\u63d0\u4f9b\u7a69\u5b9a\u548c\u9ad8\u6548\u7684\u652f\u6301\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u63a2\u7d22MySQL\u4e2d\u4e3b\u9375\u7684\u4e09\u500b\u95dc\u9375\u67e5\u8a62\uff0c\u63d0\u5347\u6578\u64da\u5eab\u7ba1\u7406\u6280\u80fd\uff0c\u512a\u5316\u6027\u80fd\uff0c\u78ba\u4fdd\u6578\u64da\u5b8c\u6574\u6027\u3002<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[101],"tags":[],"class_list":["post-61035","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/61035","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=61035"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/61035\/revisions"}],"predecessor-version":[{"id":61036,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/61035\/revisions\/61036"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=61035"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=61035"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=61035"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}