{"id":160657,"date":"2024-11-03T23:55:19","date_gmt":"2024-11-03T15:55:19","guid":{"rendered":"https:\/\/server.hk\/cnblog\/160657\/"},"modified":"2024-11-03T23:55:19","modified_gmt":"2024-11-03T15:55:19","slug":"postgresql%e6%95%99%e7%a8%8bpostgresql-%e5%88%a5%e5%90%8d","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/160657\/","title":{"rendered":"POSTGRESQL\u6559\u7a0bPostgreSQL \u5225\u540d"},"content":{"rendered":"<h1 id=\"postgresql%e6%95%99%e7%a8%8b%ef%bc%9apostgresql-%e5%88%a5%e5%90%8d-pFHaAhJogq\">PostgreSQL\u6559\u7a0b\uff1aPostgreSQL \u5225\u540d<\/h1>\n<p>PostgreSQL\u662f\u4e00\u500b\u529f\u80fd\u5f37\u5927\u7684\u958b\u6e90\u95dc\u806f\u6578\u64da\u5eab\u7ba1\u7406\u7cfb\u7d71\uff0c\u5ee3\u6cdb\u61c9\u7528\u65bc\u5404\u7a2e\u61c9\u7528\u7a0b\u5e8f\u4e2d\u3002\u5b83\u7684\u9748\u6d3b\u6027\u548c\u64f4\u5c55\u6027\u4f7f\u5176\u6210\u70ba\u8a31\u591a\u958b\u767c\u8005\u548c\u4f01\u696d\u7684\u9996\u9078\u3002\u5728\u4f7f\u7528PostgreSQL\u7684\u904e\u7a0b\u4e2d\uff0c\u5225\u540d\uff08Alias\uff09\u662f\u4e00\u500b\u975e\u5e38\u6709\u7528\u7684\u529f\u80fd\uff0c\u53ef\u4ee5\u5e6b\u52a9\u7c21\u5316\u67e5\u8a62\u548c\u63d0\u9ad8\u53ef\u8b80\u6027\u3002<\/p>\n<h2 id=\"%e4%bb%80%e9%ba%bc%e6%98%af%e5%88%a5%e5%90%8d%ef%bc%9f-pFHaAhJogq\">\u4ec0\u9ebc\u662f\u5225\u540d\uff1f<\/h2>\n<p>\u5728SQL\u4e2d\uff0c\u5225\u540d\u662f\u7528\u4f86\u7d66\u8868\u6216\u5217\u6307\u5b9a\u4e00\u500b\u81e8\u6642\u540d\u7a31\u7684\u3002\u9019\u6a23\u505a\u7684\u597d\u8655\u662f\u53ef\u4ee5\u4f7f\u67e5\u8a62\u66f4\u7c21\u6f54\uff0c\u7279\u5225\u662f\u5728\u8655\u7406\u8907\u96dc\u7684\u67e5\u8a62\u6642\u3002\u4f7f\u7528\u5225\u540d\u4e0d\u6703\u6539\u8b8a\u6578\u64da\u5eab\u4e2d\u7684\u5be6\u969b\u8868\u540d\u6216\u5217\u540d\uff0c\u5b83\u50c5\u50c5\u662f\u5728\u67e5\u8a62\u7684\u4e0a\u4e0b\u6587\u4e2d\u4f7f\u7528\u3002<\/p>\n<h2 id=\"%e5%a6%82%e4%bd%95%e4%bd%bf%e7%94%a8%e5%88%a5%e5%90%8d-pFHaAhJogq\">\u5982\u4f55\u4f7f\u7528\u5225\u540d<\/h2>\n<p>\u5728PostgreSQL\u4e2d\uff0c\u4f7f\u7528\u5225\u540d\u7684\u8a9e\u6cd5\u975e\u5e38\u7c21\u55ae\u3002\u5c0d\u65bc\u5217\u7684\u5225\u540d\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u8a9e\u6cd5\uff1a<\/p>\n<pre><code>SELECT column_name AS alias_name\nFROM table_name;<\/code><\/pre>\n<p>\u5c0d\u65bc\u8868\u7684\u5225\u540d\uff0c\u8a9e\u6cd5\u5982\u4e0b\uff1a<\/p>\n<pre><code>SELECT column_name\nFROM table_name AS alias_name;<\/code><\/pre>\n<h3 id=\"%e7%a4%ba%e4%be%8b%ef%bc%9a%e5%88%97%e7%9a%84%e5%88%a5%e5%90%8d-pFHaAhJogq\">\u793a\u4f8b\uff1a\u5217\u7684\u5225\u540d<\/h3>\n<p>\u5047\u8a2d\u6211\u5011\u6709\u4e00\u500b\u540d\u70ba\u201cemployees\u201d\u7684\u8868\uff0c\u5305\u542b\u201cfirst_name\u201d\u548c\u201clast_name\u201d\u5169\u500b\u5217\u3002\u6211\u5011\u5e0c\u671b\u5728\u67e5\u8a62\u7d50\u679c\u4e2d\u5c07\u9019\u5169\u500b\u5217\u7684\u540d\u7a31\u66f4\u6539\u70ba\u201c\u540d\u201d\u548c\u201c\u59d3\u201d\u3002\u53ef\u4ee5\u9019\u6a23\u5beb\uff1a<\/p>\n<pre><code>SELECT first_name AS \u540d, last_name AS \u59d3\nFROM employees;<\/code><\/pre>\n<p>\u9019\u6a23\uff0c\u67e5\u8a62\u7d50\u679c\u5c07\u986f\u793a\u201c\u540d\u201d\u548c\u201c\u59d3\u201d\u4f5c\u70ba\u5217\u6a19\u984c\uff0c\u800c\u4e0d\u662f\u539f\u59cb\u7684\u5217\u540d\u3002<\/p>\n<h3 id=\"%e7%a4%ba%e4%be%8b%ef%bc%9a%e8%a1%a8%e7%9a%84%e5%88%a5%e5%90%8d-pFHaAhJogq\">\u793a\u4f8b\uff1a\u8868\u7684\u5225\u540d<\/h3>\n<p>\u5982\u679c\u6211\u5011\u60f3\u8981\u7d66\u201cemployees\u201d\u8868\u4e00\u500b\u5225\u540d\uff0c\u4f8b\u5982\u201ce\u201d\uff0c\u53ef\u4ee5\u9019\u6a23\u5beb\uff1a<\/p>\n<pre><code>SELECT e.first_name, e.last_name\nFROM employees AS e;<\/code><\/pre>\n<p>\u9019\u6a23\uff0c\u6211\u5011\u5728\u67e5\u8a62\u4e2d\u5c31\u53ef\u4ee5\u4f7f\u7528\u201ce\u201d\u4f86\u4ee3\u66ff\u201cemployees\u201d\uff0c\u4f7f\u67e5\u8a62\u66f4\u52a0\u7c21\u6f54\u3002<\/p>\n<h2 id=\"%e4%bd%bf%e7%94%a8%e5%88%a5%e5%90%8d%e7%9a%84%e5%a5%bd%e8%99%95-pFHaAhJogq\">\u4f7f\u7528\u5225\u540d\u7684\u597d\u8655<\/h2>\n<ul>\n<li><strong>\u63d0\u9ad8\u53ef\u8b80\u6027\uff1a<\/strong>\u4f7f\u7528\u5225\u540d\u53ef\u4ee5\u4f7f\u67e5\u8a62\u7d50\u679c\u66f4\u6613\u65bc\u7406\u89e3\uff0c\u7279\u5225\u662f\u5728\u8655\u7406\u591a\u500b\u8868\u6216\u8907\u96dc\u7684\u8a08\u7b97\u6642\u3002<\/li>\n<li><strong>\u7c21\u5316\u67e5\u8a62\uff1a<\/strong>\u5728\u67e5\u8a62\u4e2d\u4f7f\u7528\u5225\u540d\u53ef\u4ee5\u6e1b\u5c11\u8f38\u5165\u7684\u5b57\u7b26\u6578\uff0c\u7279\u5225\u662f\u5728\u9700\u8981\u591a\u6b21\u5f15\u7528\u540c\u4e00\u8868\u6216\u5217\u6642\u3002<\/li>\n<li><strong>\u907f\u514d\u540d\u7a31\u885d\u7a81\uff1a<\/strong>\u5728\u806f\u63a5\u591a\u500b\u8868\u6642\uff0c\u4f7f\u7528\u5225\u540d\u53ef\u4ee5\u907f\u514d\u5217\u540d\u885d\u7a81\uff0c\u78ba\u4fdd\u67e5\u8a62\u7684\u6b63\u78ba\u6027\u3002<\/li>\n<\/ul>\n<h2 id=\"%e6%b3%a8%e6%84%8f%e4%ba%8b%e9%a0%85-pFHaAhJogq\">\u6ce8\u610f\u4e8b\u9805<\/h2>\n<p>\u96d6\u7136\u4f7f\u7528\u5225\u540d\u6709\u5f88\u591a\u597d\u8655\uff0c\u4f46\u5728\u4f7f\u7528\u6642\u4e5f\u9700\u8981\u6ce8\u610f\u4ee5\u4e0b\u5e7e\u9ede\uff1a<\/p>\n<ul>\n<li>\u5225\u540d\u50c5\u5728\u67e5\u8a62\u7684\u4e0a\u4e0b\u6587\u4e2d\u6709\u6548\uff0c\u67e5\u8a62\u7d50\u675f\u5f8c\u5c07\u4e0d\u518d\u5b58\u5728\u3002<\/li>\n<li>\u5728\u4f7f\u7528\u5225\u540d\u6642\uff0c\u61c9\u907f\u514d\u4f7f\u7528\u8207\u6578\u64da\u5eab\u4e2d\u73fe\u6709\u5217\u540d\u6216\u8868\u540d\u76f8\u540c\u7684\u540d\u7a31\uff0c\u4ee5\u514d\u9020\u6210\u6df7\u6dc6\u3002<\/li>\n<li>\u5728\u4f7f\u7528\u8907\u96dc\u67e5\u8a62\u6642\uff0c\u61c9\u4fdd\u6301\u5225\u540d\u7684\u7c21\u6f54\u6027\u548c\u63cf\u8ff0\u6027\uff0c\u4ee5\u4fbf\u5176\u4ed6\u958b\u767c\u8005\u80fd\u5920\u8f15\u9b06\u7406\u89e3\u67e5\u8a62\u7684\u610f\u5716\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b8%bd%e7%b5%90-pFHaAhJogq\">\u7e3d\u7d50<\/h2>\n<p>PostgreSQL\u7684\u5225\u540d\u529f\u80fd\u70ba\u958b\u767c\u8005\u63d0\u4f9b\u4e86\u9748\u6d3b\u6027\u548c\u4fbf\u5229\u6027\uff0c\u4f7f\u5f97\u67e5\u8a62\u66f4\u52a0\u6e05\u6670\u6613\u61c2\u3002\u7121\u8ad6\u662f\u5728\u7c21\u55ae\u7684\u67e5\u8a62\u9084\u662f\u8907\u96dc\u7684\u6578\u64da\u64cd\u4f5c\u4e2d\uff0c\u5408\u7406\u4f7f\u7528\u5225\u540d\u90fd\u80fd\u986f\u8457\u63d0\u9ad8\u5de5\u4f5c\u6548\u7387\u3002\u5982\u679c\u60a8\u6b63\u5728\u5c0b\u627e\u9ad8\u6548\u7684\u6578\u64da\u5eab\u89e3\u6c7a\u65b9\u6848\uff0c\u8003\u616e\u4f7f\u7528<a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a>\u4f86\u90e8\u7f72\u60a8\u7684PostgreSQL\u6578\u64da\u5eab\uff0c\u4eab\u53d7\u7a69\u5b9a\u548c\u9ad8\u6548\u7684\u670d\u52d9\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5b66\u4e60PostgreSQL\u6559\u7a0b\uff0c\u638c\u63e1PostgreSQL\u522b\u540d\u7684\u4f7f\u7528\u6280\u5de7\uff0c\u63d0\u5347\u6570\u636e\u5e93\u67e5\u8be2\u6548\u7387\uff0c\u8f7b\u677e\u7ba1\u7406\u6570\u636e\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-160657","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/160657","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=160657"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/160657\/revisions"}],"predecessor-version":[{"id":160658,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/160657\/revisions\/160658"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=160657"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=160657"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=160657"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}