{"id":187876,"date":"2024-11-11T17:55:22","date_gmt":"2024-11-11T09:55:22","guid":{"rendered":"https:\/\/server.hk\/cnblog\/187876\/"},"modified":"2024-11-11T17:55:23","modified_gmt":"2024-11-11T09:55:23","slug":"%e6%95%b8%e6%93%9a%e5%ba%ab%e8%bd%89%e6%8f%9b%e9%a1%9e%e5%9e%8b%ef%bc%9a%e6%95%b8%e6%93%9a%e8%90%ac%e7%89%a9%e7%9a%86%e5%8f%af%e8%bd%89%e6%8f%9b-%e6%95%b8%e6%93%9a%e5%ba%ab%e8%bd%89%e6%8f%9b%e9%a1%9e","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/187876\/","title":{"rendered":"\u6578\u64da\u5eab\u8f49\u63db\u985e\u578b\uff1a\u6578\u64da\u842c\u7269\u7686\u53ef\u8f49\u63db (\u6578\u64da\u5eab\u8f49\u63db\u985e\u578b\u6578\u64da)"},"content":{"rendered":"<h1 id=\"%e6%95%b8%e6%93%9a%e5%ba%ab%e8%bd%89%e6%8f%9b%e9%a1%9e%e5%9e%8b%ef%bc%9a%e6%95%b8%e6%93%9a%e8%90%ac%e7%89%a9%e7%9a%86%e5%8f%af%e8%bd%89%e6%8f%9b-dRRYDKhFKy\">\u6578\u64da\u5eab\u8f49\u63db\u985e\u578b\uff1a\u6578\u64da\u842c\u7269\u7686\u53ef\u8f49\u63db<\/h1>\n<p>\u5728\u7576\u4eca\u6578\u64da\u9a45\u52d5\u7684\u4e16\u754c\u4e2d\uff0c\u6578\u64da\u5eab\u7684\u8f49\u63db\u6210\u70ba\u4e86\u4f01\u696d\u548c\u958b\u767c\u8005\u9762\u81e8\u7684\u4e00\u500b\u91cd\u8981\u6311\u6230\u3002\u96a8\u8457\u6280\u8853\u7684\u9032\u6b65\u548c\u696d\u52d9\u9700\u6c42\u7684\u8b8a\u5316\uff0c\u6578\u64da\u5eab\u7684\u985e\u578b\u548c\u7d50\u69cb\u4e5f\u5728\u4e0d\u65b7\u6f14\u8b8a\u3002\u672c\u6587\u5c07\u63a2\u8a0e\u6578\u64da\u5eab\u8f49\u63db\u7684\u985e\u578b\u53ca\u5176\u91cd\u8981\u6027\uff0c\u4e26\u63d0\u4f9b\u4e00\u4e9b\u5be6\u7528\u7684\u793a\u4f8b\u548c\u4ee3\u78bc\u7247\u6bb5\uff0c\u5e6b\u52a9\u8b80\u8005\u66f4\u597d\u5730\u7406\u89e3\u9019\u4e00\u4e3b\u984c\u3002<\/p>\n<h2 id=\"%e4%bb%80%e9%ba%bc%e6%98%af%e6%95%b8%e6%93%9a%e5%ba%ab%e8%bd%89%e6%8f%9b%ef%bc%9f-dRRYDKhFKy\">\u4ec0\u9ebc\u662f\u6578\u64da\u5eab\u8f49\u63db\uff1f<\/h2>\n<p>\u6578\u64da\u5eab\u8f49\u63db\u662f\u6307\u5c07\u6578\u64da\u5f9e\u4e00\u7a2e\u6578\u64da\u5eab\u7cfb\u7d71\u6216\u683c\u5f0f\u8f49\u79fb\u5230\u53e6\u4e00\u7a2e\u7cfb\u7d71\u6216\u683c\u5f0f\u7684\u904e\u7a0b\u3002\u9019\u4e00\u904e\u7a0b\u53ef\u80fd\u6d89\u53ca\u6578\u64da\u7684\u7d50\u69cb\u8abf\u6574\u3001\u6578\u64da\u985e\u578b\u7684\u8f49\u63db\u4ee5\u53ca\u6578\u64da\u7684\u6e05\u7406\u548c\u6574\u5408\u3002\u6578\u64da\u5eab\u8f49\u63db\u901a\u5e38\u5728\u4ee5\u4e0b\u60c5\u6cc1\u4e0b\u9032\u884c\uff1a<\/p>\n<ul>\n<li>\u7cfb\u7d71\u5347\u7d1a\u6216\u66f4\u63db\uff1a\u7576\u4f01\u696d\u6c7a\u5b9a\u66f4\u63db\u5176\u6578\u64da\u5eab\u7cfb\u7d71\u6642\uff0c\u5fc5\u9808\u5c07\u820a\u7cfb\u7d71\u4e2d\u7684\u6578\u64da\u8f49\u79fb\u5230\u65b0\u7cfb\u7d71\u4e2d\u3002<\/li>\n<li>\u6578\u64da\u6574\u5408\uff1a\u5728\u5408\u4f75\u6216\u6536\u8cfc\u7684\u60c5\u6cc1\u4e0b\uff0c\u4f01\u696d\u9700\u8981\u5c07\u4f86\u81ea\u4e0d\u540c\u4f86\u6e90\u7684\u6578\u64da\u6574\u5408\u5230\u4e00\u500b\u7d71\u4e00\u7684\u6578\u64da\u5eab\u4e2d\u3002<\/li>\n<li>\u6578\u64da\u683c\u5f0f\u8f49\u63db\uff1a\u5728\u4e0d\u540c\u7684\u61c9\u7528\u7a0b\u5e8f\u6216\u5e73\u53f0\u4e4b\u9593\uff0c\u6578\u64da\u683c\u5f0f\u53ef\u80fd\u4e0d\u517c\u5bb9\uff0c\u56e0\u6b64\u9700\u8981\u9032\u884c\u8f49\u63db\u3002<\/li>\n<\/ul>\n<h2 id=\"%e6%95%b8%e6%93%9a%e5%ba%ab%e8%bd%89%e6%8f%9b%e7%9a%84%e9%a1%9e%e5%9e%8b-dRRYDKhFKy\">\u6578\u64da\u5eab\u8f49\u63db\u7684\u985e\u578b<\/h2>\n<p>\u6578\u64da\u5eab\u8f49\u63db\u53ef\u4ee5\u6839\u64da\u4e0d\u540c\u7684\u6a19\u6e96\u9032\u884c\u5206\u985e\uff0c\u4ee5\u4e0b\u662f\u5e7e\u7a2e\u5e38\u898b\u7684\u8f49\u63db\u985e\u578b\uff1a<\/p>\n<h3 id=\"1-%e7%b5%90%e6%a7%8b%e8%bd%89%e6%8f%9b-dRRYDKhFKy\">1. \u7d50\u69cb\u8f49\u63db<\/h3>\n<p>\u7d50\u69cb\u8f49\u63db\u662f\u6307\u5c0d\u6578\u64da\u5eab\u7684\u7d50\u69cb\u9032\u884c\u8abf\u6574\uff0c\u4f8b\u5982\u5f9e\u95dc\u4fc2\u578b\u6578\u64da\u5eab\u8f49\u63db\u70ba\u975e\u95dc\u4fc2\u578b\u6578\u64da\u5eab\u3002\u9019\u7a2e\u8f49\u63db\u901a\u5e38\u9700\u8981\u91cd\u65b0\u8a2d\u8a08\u6578\u64da\u6a21\u578b\uff0c\u4ee5\u9069\u61c9\u65b0\u7684\u6578\u64da\u5b58\u5132\u65b9\u5f0f\u3002<\/p>\n<pre><code>-- \u4f8b\u5b50\uff1a\u5c07\u95dc\u4fc2\u578b\u6578\u64da\u8f49\u63db\u70baJSON\u683c\u5f0f\nSELECT json_agg(row_to_json(t))\nFROM (SELECT * FROM your_table) t;<\/code><\/pre>\n<h3 id=\"2-%e6%95%b8%e6%93%9a%e9%a1%9e%e5%9e%8b%e8%bd%89%e6%8f%9b-dRRYDKhFKy\">2. \u6578\u64da\u985e\u578b\u8f49\u63db<\/h3>\n<p>\u6578\u64da\u985e\u578b\u8f49\u63db\u6d89\u53ca\u5c07\u6578\u64da\u5f9e\u4e00\u7a2e\u6578\u64da\u985e\u578b\u8f49\u63db\u70ba\u53e6\u4e00\u7a2e\u6578\u64da\u985e\u578b\u3002\u4f8b\u5982\uff0c\u5c07\u5b57\u7b26\u4e32\u8f49\u63db\u70ba\u6574\u6578\uff0c\u6216\u5c07\u65e5\u671f\u683c\u5f0f\u9032\u884c\u6a19\u6e96\u5316\u3002<\/p>\n<pre><code>-- \u4f8b\u5b50\uff1a\u5c07\u5b57\u7b26\u4e32\u8f49\u63db\u70ba\u6574\u6578\nSELECT CAST(your_column AS INTEGER) FROM your_table;<\/code><\/pre>\n<h3 id=\"3-%e6%95%b8%e6%93%9a%e6%b8%85%e7%90%86-dRRYDKhFKy\">3. \u6578\u64da\u6e05\u7406<\/h3>\n<p>\u5728\u6578\u64da\u8f49\u63db\u904e\u7a0b\u4e2d\uff0c\u6578\u64da\u6e05\u7406\u662f\u5fc5\u4e0d\u53ef\u5c11\u7684\u6b65\u9a5f\u3002\u9019\u5305\u62ec\u522a\u9664\u91cd\u8907\u6578\u64da\u3001\u586b\u88dc\u7f3a\u5931\u503c\u4ee5\u53ca\u4fee\u6b63\u4e0d\u4e00\u81f4\u7684\u6578\u64da\u683c\u5f0f\u3002<\/p>\n<pre><code>-- \u4f8b\u5b50\uff1a\u522a\u9664\u91cd\u8907\u6578\u64da\nDELETE FROM your_table\nWHERE ctid NOT IN (SELECT MIN(ctid) FROM your_table GROUP BY your_column);<\/code><\/pre>\n<h3 id=\"4-%e6%95%b8%e6%93%9a%e9%81%b7%e7%a7%bb-dRRYDKhFKy\">4. \u6578\u64da\u9077\u79fb<\/h3>\n<p>\u6578\u64da\u9077\u79fb\u662f\u6307\u5c07\u6578\u64da\u5f9e\u4e00\u500b\u6578\u64da\u5eab\u7cfb\u7d71\u9077\u79fb\u5230\u53e6\u4e00\u500b\u7cfb\u7d71\uff0c\u9019\u901a\u5e38\u6d89\u53ca\u5230\u6578\u64da\u7684\u5c0e\u51fa\u548c\u5c0e\u5165\u904e\u7a0b\u3002<\/p>\n<pre><code>-- \u4f8b\u5b50\uff1a\u4f7f\u7528pg_dump\u5c0e\u51faPostgreSQL\u6578\u64da\npg_dump your_database &gt; your_database.sql;<\/code><\/pre>\n<h2 id=\"%e6%95%b8%e6%93%9a%e5%ba%ab%e8%bd%89%e6%8f%9b%e7%9a%84%e6%8c%91%e6%88%b0-dRRYDKhFKy\">\u6578\u64da\u5eab\u8f49\u63db\u7684\u6311\u6230<\/h2>\n<p>\u5118\u7ba1\u6578\u64da\u5eab\u8f49\u63db\u53ef\u4ee5\u5e36\u4f86\u8a31\u591a\u597d\u8655\uff0c\u4f46\u5728\u5be6\u65bd\u904e\u7a0b\u4e2d\u4e5f\u6703\u9762\u81e8\u4e00\u4e9b\u6311\u6230\uff0c\u5305\u62ec\uff1a<\/p>\n<ul>\n<li>\u6578\u64da\u4e1f\u5931\uff1a\u5728\u8f49\u63db\u904e\u7a0b\u4e2d\uff0c\u82e5\u672a\u59a5\u5584\u8655\u7406\uff0c\u53ef\u80fd\u6703\u5c0e\u81f4\u6578\u64da\u4e1f\u5931\u6216\u640d\u58de\u3002<\/li>\n<li>\u517c\u5bb9\u6027\u554f\u984c\uff1a\u4e0d\u540c\u6578\u64da\u5eab\u7cfb\u7d71\u4e4b\u9593\u7684\u517c\u5bb9\u6027\u554f\u984c\u53ef\u80fd\u6703\u5f71\u97ff\u8f49\u63db\u7684\u6210\u529f\u7387\u3002<\/li>\n<li>\u6027\u80fd\u5f71\u97ff\uff1a\u8f49\u63db\u904e\u7a0b\u53ef\u80fd\u6703\u5f71\u97ff\u7cfb\u7d71\u6027\u80fd\uff0c\u7279\u5225\u662f\u5728\u8655\u7406\u5927\u91cf\u6578\u64da\u6642\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b8%bd%e7%b5%90-dRRYDKhFKy\">\u7e3d\u7d50<\/h2>\n<p>\u6578\u64da\u5eab\u8f49\u63db\u662f\u4e00\u500b\u8907\u96dc\u4f46\u5fc5\u8981\u7684\u904e\u7a0b\uff0c\u80fd\u5920\u5e6b\u52a9\u4f01\u696d\u9069\u61c9\u4e0d\u65b7\u8b8a\u5316\u7684\u6280\u8853\u74b0\u5883\u548c\u696d\u52d9\u9700\u6c42\u3002\u4e86\u89e3\u4e0d\u540c\u7684\u8f49\u63db\u985e\u578b\u53ca\u5176\u6311\u6230\uff0c\u53ef\u4ee5\u5e6b\u52a9\u958b\u767c\u8005\u548c\u4f01\u696d\u66f4\u6709\u6548\u5730\u7ba1\u7406\u6578\u64da\u3002\u5c0d\u65bc\u9700\u8981\u9ad8\u6548\u6578\u64da\u7ba1\u7406\u7684\u4f01\u696d\uff0c\u9078\u64c7\u5408\u9069\u7684 <a href=\"https:\/\/server.hk\">VPS<\/a> \u6216 <a href=\"https:\/\/server.hk\">\u9999\u6e2f\u4f3a\u670d\u5668<\/a> \u89e3\u6c7a\u65b9\u6848\u81f3\u95dc\u91cd\u8981\uff0c\u4ee5\u78ba\u4fdd\u6578\u64da\u7684\u5b89\u5168\u6027\u548c\u53ef\u7528\u6027\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u63a2\u7d22\u6578\u64da\u5eab\u8f49\u63db\u985e\u578b\uff0c\u4e86\u89e3\u5982\u4f55\u5c07\u5404\u7a2e\u6578\u64da\u683c\u5f0f\u8f49\u63db\u70ba\u53ef\u7528\u4fe1\u606f\uff0c\u5be6\u73fe\u6578\u64da\u7684\u7121\u7e2b\u6d41\u901a\u8207\u61c9\u7528\u3002<\/p>\n","protected":false},"author":0,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[101],"tags":[],"class_list":["post-187876","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/187876","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"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=187876"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/187876\/revisions"}],"predecessor-version":[{"id":187877,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/187876\/revisions\/187877"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=187876"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=187876"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=187876"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}