{"id":20649,"date":"2024-01-02T05:19:24","date_gmt":"2024-01-02T05:19:24","guid":{"rendered":"https:\/\/server.hk\/blog\/20649\/"},"modified":"2024-11-14T10:39:22","modified_gmt":"2024-11-14T02:39:22","slug":"postgresql-command-copy","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/20649\/","title":{"rendered":"PostgreSQL \u547d\u4ee4: COPY"},"content":{"rendered":"<h1 id=\"postgresql-command-copy-yCGLKRxfSH\">PostgreSQL \u547d\u4ee4: COPY<\/h1>\n<p>PostgreSQL \u662f\u4e00\u500b\u529f\u80fd\u5f37\u5927\u7684\u958b\u6e90\u95dc\u806f\u5f0f\u6578\u64da\u5eab\u7ba1\u7406\u7cfb\u7d71\uff0c\u63d0\u4f9b\u591a\u7a2e\u529f\u80fd\u548c\u64cd\u4f5c\u9078\u9805\u3002\u5176\u4e2d\u4e00\u500b\u91cd\u8981\u7684\u547d\u4ee4\u662f COPY\uff0c\u5b83\u5141\u8a31\u7528\u6236\u5728\u6587\u4ef6\u548c\u6578\u64da\u5eab\u8868\u4e4b\u9593\u9ad8\u6548\u5730\u5c0e\u5165\u548c\u5c0e\u51fa\u6578\u64da\u3002\u672c\u6587\u5c07\u8a73\u7d30\u4ecb\u7d39 COPY \u547d\u4ee4\uff0c\u4e26\u89e3\u91cb\u5982\u4f55\u6709\u6548\u5730\u4f7f\u7528\u5b83\u3002<\/p>\n<h2 id=\"introduction-to-copy-command-yCGLKRxfSH\">COPY \u547d\u4ee4\u7c21\u4ecb<\/h2>\n<p>PostgreSQL \u4e2d\u7684 COPY \u547d\u4ee4\u7528\u65bc\u5728\u6587\u4ef6\u548c\u8868\u4e4b\u9593\u8907\u88fd\u6578\u64da\uff0c\u6216\u53cd\u4e4b\u4ea6\u7136\u3002\u5b83\u63d0\u4f9b\u4e86\u4e00\u7a2e\u5feb\u901f\u9ad8\u6548\u7684\u65b9\u6cd5\u4f86\u5c0e\u5165\u6216\u5c0e\u51fa\u5927\u91cf\u6578\u64da\u3002\u8a72\u547d\u4ee4\u652f\u6301\u5404\u7a2e\u6587\u4ef6\u683c\u5f0f\uff0c\u5305\u62ec CSV\u3001\u6587\u672c\u3001\u4e8c\u9032\u5236\u7b49\u3002\u7121\u8ad6\u662f\u8981\u5f9e\u6587\u4ef6\u4e2d\u52a0\u8f09\u6578\u64da\u5230\u8868\uff0c\u9084\u662f\u5f9e\u8868\u4e2d\u63d0\u53d6\u6578\u64da\u5230\u6587\u4ef6\uff0cCOPY \u547d\u4ee4\u90fd\u662f\u9996\u9078\u89e3\u6c7a\u65b9\u6848\u3002<\/p>\n<h2 id=\"using-copy-to-import-data-yCGLKRxfSH\">\u4f7f\u7528 COPY \u5c0e\u5165\u6578\u64da<\/h2>\n<p>\u7576\u4f7f\u7528 COPY \u547d\u4ee4\u5411 PostgreSQL \u8868\u4e2d\u5c0e\u5165\u6578\u64da\u6642\uff0c\u4f60\u9700\u8981\u78ba\u4fdd\u6587\u4ef6\u683c\u5f0f\u8207\u8868\u7684\u7d50\u69cb\u5339\u914d\u3002\u5047\u8a2d\u6211\u5011\u6709\u4e00\u500b\u540d\u70ba &#8220;employees&#8221; \u7684\u8868\uff0c\u5305\u542b &#8220;id&#8221;\u3001&#8221;name&#8221; \u548c &#8220;salary&#8221; \u4e09\u500b\u6b04\u4f4d\u3002\u6211\u5011\u6709\u4e00\u500b\u540d\u70ba &#8220;employees.csv&#8221; \u7684 CSV \u6587\u4ef6\uff0c\u5305\u542b\u6211\u5011\u60f3\u8981\u5c0e\u5165\u7684\u6578\u64da\u3002<\/p>\n<p>\u8981\u5c07 CSV \u6587\u4ef6\u4e2d\u7684\u6578\u64da\u5c0e\u5165\u5230 &#8220;employees&#8221; \u8868\u4e2d\uff0c\u6211\u5011\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u547d\u4ee4\uff1a<\/p>\n<pre><code>COPY employees FROM '\/path\/to\/employees.csv' DELIMITER ',' CSV HEADER;<\/code><\/pre>\n<p>\u5728\u9019\u500b\u547d\u4ee4\u4e2d\uff0c\u6211\u5011\u6307\u5b9a\u4e86\u6587\u4ef6\u8def\u5f91\u3001\u5206\u9694\u7b26\uff08\u5728\u6b64\u4f8b\u4e2d\u70ba\u9017\u865f\uff09\u4ee5\u53ca\u6587\u4ef6\u683c\u5f0f\uff08CSV\uff09\u3002HEADER \u9078\u9805\u8868\u660e\u6587\u4ef6\u7684\u7b2c\u4e00\u884c\u5305\u542b\u6b04\u4f4d\u6a19\u984c\u3002<\/p>\n<h2 id=\"using-copy-to-export-data-yCGLKRxfSH\">\u4f7f\u7528 COPY \u5c0e\u51fa\u6578\u64da<\/h2>\n<p>\u5982\u679c\u4f60\u60f3\u5c07 PostgreSQL \u8868\u4e2d\u7684\u6578\u64da\u5c0e\u51fa\u5230\u6587\u4ef6\uff0c\u4e5f\u53ef\u4ee5\u4f7f\u7528 COPY \u547d\u4ee4\u3002\u5047\u8a2d\u6211\u5011\u60f3\u5c07 &#8220;employees&#8221; \u8868\u5c0e\u51fa\u5230\u540d\u70ba &#8220;exported_employees.csv&#8221; \u7684 CSV \u6587\u4ef6\u4e2d\u3002<\/p>\n<p>\u8981\u5c07\u8868\u4e2d\u7684\u6578\u64da\u5c0e\u51fa\u5230 CSV \u6587\u4ef6\uff0c\u6211\u5011\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u547d\u4ee4\uff1a<\/p>\n<pre><code>COPY employees TO '\/path\/to\/exported_employees.csv' DELIMITER ',' CSV HEADER;<\/code><\/pre>\n<p>\u8207\u5c0e\u5165\u547d\u4ee4\u985e\u4f3c\uff0c\u6211\u5011\u6307\u5b9a\u4e86\u6587\u4ef6\u8def\u5f91\u3001\u5206\u9694\u7b26\u548c\u6587\u4ef6\u683c\u5f0f\u3002\u751f\u6210\u7684\u6587\u4ef6\u5c07\u4ee5 CSV \u683c\u5f0f\u5305\u542b &#8220;employees&#8221; \u8868\u4e2d\u7684\u6578\u64da\u3002<\/p>\n<h2 id=\"additional-copy-command-options-yCGLKRxfSH\">COPY \u547d\u4ee4\u7684\u9644\u52a0\u9078\u9805<\/h2>\n<p>PostgreSQL \u4e2d\u7684 COPY \u547d\u4ee4\u63d0\u4f9b\u4e86\u5e7e\u500b\u9644\u52a0\u9078\u9805\u4f86\u589e\u5f37\u5176\u529f\u80fd\uff1a<\/p>\n<ul>\n<li><strong>FORMAT:<\/strong> \u6307\u5b9a\u6587\u4ef6\u683c\u5f0f\uff0c\u5982 CSV\u3001\u6587\u672c\u3001\u4e8c\u9032\u5236\u6216\u81ea\u5b9a\u7fa9\u683c\u5f0f\u3002<\/li>\n<li><strong>DELIMITER:<\/strong> \u5b9a\u7fa9\u6587\u4ef6\u4e2d\u4f7f\u7528\u7684\u5206\u9694\u7b26\u5b57\u7b26\u3002<\/li>\n<li><strong>NULL:<\/strong> \u6307\u5b9a\u6587\u4ef6\u4e2d\u8868\u793a NULL \u503c\u7684\u5b57\u4e32\u3002<\/li>\n<li><strong>HEADER:<\/strong> \u6307\u660e\u6587\u4ef6\u662f\u5426\u5305\u542b\u6b04\u4f4d\u6a19\u984c\u3002<\/li>\n<li><strong>FORCE_QUOTE:<\/strong> \u5f37\u5236\u5c0d\u6587\u4ef6\u4e2d\u6240\u6709\u975e NULL \u503c\u52a0\u4e0a\u5f15\u865f\u3002<\/li>\n<\/ul>\n<p>\u9019\u4e9b\u9078\u9805\u63d0\u4f9b\u4e86\u9748\u6d3b\u6027\u548c\u5c0d\u5c0e\u5165\u8207\u5c0e\u51fa\u904e\u7a0b\u7684\u63a7\u5236\uff0c\u5141\u8a31\u7528\u6236\u6839\u64da\u5177\u9ad4\u9700\u6c42\u9032\u884c\u8abf\u6574\u3002<\/p>\n<h2 id=\"conclusion-yCGLKRxfSH\">\u7d50\u8ad6<\/h2>\n<p>PostgreSQL \u4e2d\u7684 COPY \u547d\u4ee4\u662f\u4e00\u500b\u5f37\u5927\u7684\u5de5\u5177\uff0c\u7528\u65bc\u5728\u6587\u4ef6\u548c\u6578\u64da\u5eab\u8868\u4e4b\u9593\u5c0e\u5165\u548c\u5c0e\u51fa\u6578\u64da\u3002\u5b83\u63d0\u4f9b\u4e86\u4e00\u7a2e\u5feb\u901f\u9ad8\u6548\u7684\u65b9\u5f0f\u4f86\u8655\u7406\u5927\u578b\u6578\u64da\u96c6\uff0c\u4e26\u652f\u6301\u591a\u7a2e\u6587\u4ef6\u683c\u5f0f\u3002\u7121\u8ad6\u4f60\u662f\u9700\u8981\u5c07\u6578\u64da\u52a0\u8f09\u5230\u8868\u4e2d\uff0c\u9084\u662f\u5f9e\u8868\u4e2d\u63d0\u53d6\u6578\u64da\uff0cCOPY \u547d\u4ee4\u90fd\u80fd\u63d0\u4f9b\u53ef\u9760\u7684\u89e3\u6c7a\u65b9\u6848\u3002\u901a\u904e\u5229\u7528\u5176\u9078\u9805\uff0c\u4f60\u53ef\u4ee5\u6839\u64da\u9700\u6c42\u81ea\u5b9a\u7fa9\u5c0e\u5165\u548c\u5c0e\u51fa\u904e\u7a0b\u3002<\/p>\n<h2 id=\"summary-yCGLKRxfSH\">\u7e3d\u7d50<\/h2>\n<p>\u7e3d\u800c\u8a00\u4e4b\uff0cPostgreSQL \u4e2d\u7684 COPY \u547d\u4ee4\u662f\u4e00\u500b\u591a\u529f\u80fd\u7684\u5de5\u5177\uff0c\u7528\u65bc\u9ad8\u6548\u5730\u5c0e\u5165\u548c\u5c0e\u51fa\u6578\u64da\u3002\u5b83\u5141\u8a31\u7528\u6236\u5728\u6587\u4ef6\u548c\u6578\u64da\u5eab\u8868\u4e4b\u9593\u9ad8\u6548\u5730\u50b3\u8f38\u6578\u64da\u3002\u5982\u9700\u4e86\u89e3\u66f4\u591a\u6709\u95dc PostgreSQL \u53ca\u5176\u529f\u80fd\u7684\u8cc7\u8a0a\uff0c\u8acb\u8003\u616e\u63a2\u7d22 <a href=\"https:\/\/server.hk\">Server.HK<\/a>\uff0c\u9019\u662f\u4e00\u9593\u9818\u5148\u7684 VPS \u8a17\u7ba1\u516c\u53f8\uff0c\u63d0\u4f9b\u53ef\u9760\u4e14\u9ad8\u6548\u80fd\u7684\u8a17\u7ba1\u89e3\u6c7a\u65b9\u6848\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>PostgreSQL \u547d\u4ee4: C&#46;&#46;&#46;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4924],"tags":[],"class_list":["post-20649","post","type-post","status-publish","format-standard","hentry","category-setup-tutorials"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/20649","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=20649"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/20649\/revisions"}],"predecessor-version":[{"id":24363,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/20649\/revisions\/24363"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=20649"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=20649"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=20649"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}