{"id":96926,"date":"2024-10-20T13:31:15","date_gmt":"2024-10-20T05:31:15","guid":{"rendered":"https:\/\/server.hk\/cnblog\/96926\/"},"modified":"2024-10-20T13:31:16","modified_gmt":"2024-10-20T05:31:16","slug":"postgresql%e6%95%b8%e6%93%9a%e5%ba%ab%e7%9a%84%e6%8a%80%e8%a1%93%e7%89%b9%e9%bb%9e%e9%bb%9e%e8%a9%95","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/96926\/","title":{"rendered":"PostgreSQL\u6578\u64da\u5eab\u7684\u6280\u8853\u7279\u9ede\u9ede\u8a55"},"content":{"rendered":"<h1 id=\"postgresql%e6%95%b8%e6%93%9a%e5%ba%ab%e7%9a%84%e6%8a%80%e8%a1%93%e7%89%b9%e9%bb%9e%e9%bb%9e%e8%a9%95-mfvqCbdrVp\">PostgreSQL\u6578\u64da\u5eab\u7684\u6280\u8853\u7279\u9ede\u9ede\u8a55<\/h1>\n<p>PostgreSQL\u662f\u4e00\u6b3e\u529f\u80fd\u5f37\u5927\u7684\u958b\u6e90\u95dc\u806f\u6578\u64da\u5eab\u7ba1\u7406\u7cfb\u7d71\uff0c\u56e0\u5176\u7a69\u5b9a\u6027\u548c\u9748\u6d3b\u6027\u800c\u53d7\u5230\u5ee3\u6cdb\u4f7f\u7528\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0ePostgreSQL\u7684\u6280\u8853\u7279\u9ede\uff0c\u5e6b\u52a9\u8b80\u8005\u66f4\u597d\u5730\u7406\u89e3\u9019\u6b3e\u6578\u64da\u5eab\u7684\u512a\u52e2\u53ca\u5176\u9069\u7528\u5834\u666f\u3002<\/p>\n<h2 id=\"1-acid%e5%90%88%e8%a6%8f%e6%80%a7-mfvqCbdrVp\">1. ACID\u5408\u898f\u6027<\/h2>\n<p>PostgreSQL\u5b8c\u5168\u9075\u5faaACID\uff08\u539f\u5b50\u6027\u3001\u4e00\u81f4\u6027\u3001\u9694\u96e2\u6027\u3001\u6301\u4e45\u6027\uff09\u539f\u5247\uff0c\u9019\u4f7f\u5f97\u6578\u64da\u5eab\u5728\u8655\u7406\u4e8b\u52d9\u6642\u80fd\u5920\u4fdd\u8b49\u6578\u64da\u7684\u5b8c\u6574\u6027\u548c\u53ef\u9760\u6027\u3002\u9019\u4e00\u7279\u6027\u5c0d\u65bc\u9700\u8981\u9ad8\u53ef\u9760\u6027\u7684\u61c9\u7528\u5834\u666f\u5c24\u70ba\u91cd\u8981\uff0c\u4f8b\u5982\u91d1\u878d\u7cfb\u7d71\u548c\u96fb\u5b50\u5546\u52d9\u5e73\u53f0\u3002<\/p>\n<h2 id=\"2-%e6%93%b4%e5%b1%95%e6%80%a7-mfvqCbdrVp\">2. \u64f4\u5c55\u6027<\/h2>\n<p>PostgreSQL\u7684\u64f4\u5c55\u6027\u662f\u5176\u4e00\u5927\u4eae\u9ede\u3002\u7528\u6236\u53ef\u4ee5\u901a\u904e\u81ea\u5b9a\u7fa9\u6578\u64da\u985e\u578b\u3001\u51fd\u6578\u548c\u64cd\u4f5c\u7b26\u4f86\u64f4\u5c55\u6578\u64da\u5eab\u7684\u529f\u80fd\u3002\u6b64\u5916\uff0cPostgreSQL\u652f\u6301\u591a\u7a2e\u64f4\u5c55\u6a21\u584a\uff0c\u5982PostGIS\uff08\u5730\u7406\u4fe1\u606f\u7cfb\u7d71\u64f4\u5c55\uff09\u548cpg_partman\uff08\u5206\u5340\u7ba1\u7406\u64f4\u5c55\uff09\uff0c\u9019\u4e9b\u90fd\u4f7f\u5f97PostgreSQL\u80fd\u5920\u9069\u61c9\u4e0d\u540c\u7684\u696d\u52d9\u9700\u6c42\u3002<\/p>\n<h2 id=\"3-%e6%94%af%e6%8c%81%e8%a4%87%e9%9b%9c%e6%9f%a5%e8%a9%a2-mfvqCbdrVp\">3. \u652f\u6301\u8907\u96dc\u67e5\u8a62<\/h2>\n<p>PostgreSQL\u652f\u6301\u8907\u96dc\u7684\u67e5\u8a62\u8a9e\u53e5\uff0c\u5305\u62ec\u5b50\u67e5\u8a62\u3001\u806f\u63a5\u3001\u7a97\u53e3\u51fd\u6578\u7b49\u3002\u9019\u4f7f\u5f97\u7528\u6236\u80fd\u5920\u9032\u884c\u9ad8\u6548\u7684\u6578\u64da\u5206\u6790\u548c\u5831\u544a\u751f\u6210\u3002\u4ee5\u4e0b\u662f\u4e00\u500b\u7c21\u55ae\u7684\u67e5\u8a62\u793a\u4f8b\uff1a<\/p>\n<pre><code>SELECT department, COUNT(*) \nFROM employees \nGROUP BY department \nHAVING COUNT(*) &gt; 10;<\/code><\/pre>\n<p>\u9019\u6bb5SQL\u8a9e\u53e5\u53ef\u4ee5\u7528\u4f86\u67e5\u8a62\u54e1\u5de5\u6578\u91cf\u8d85\u904e10\u4eba\u7684\u90e8\u9580\uff0c\u5c55\u793a\u4e86PostgreSQL\u5728\u6578\u64da\u805a\u5408\u65b9\u9762\u7684\u5f37\u5927\u80fd\u529b\u3002<\/p>\n<h2 id=\"4-json%e5%92%8c%e9%9d%9e%e7%b5%90%e6%a7%8b%e5%8c%96%e6%95%b8%e6%93%9a%e6%94%af%e6%8c%81-mfvqCbdrVp\">4. JSON\u548c\u975e\u7d50\u69cb\u5316\u6578\u64da\u652f\u6301<\/h2>\n<p>\u96a8\u8457\u975e\u7d50\u69cb\u5316\u6578\u64da\u7684\u8208\u8d77\uff0cPostgreSQL\u63d0\u4f9b\u4e86\u5c0dJSON\u6578\u64da\u985e\u578b\u7684\u539f\u751f\u652f\u6301\u3002\u7528\u6236\u53ef\u4ee5\u5728\u6578\u64da\u5eab\u4e2d\u5b58\u5132\u548c\u67e5\u8a62JSON\u6578\u64da\uff0c\u9019\u5c0d\u65bc\u9700\u8981\u9748\u6d3b\u6578\u64da\u7d50\u69cb\u7684\u61c9\u7528\u5834\u666f\u975e\u5e38\u6709\u7528\u3002\u4ee5\u4e0b\u662f\u4e00\u500b\u4f7f\u7528JSON\u7684\u793a\u4f8b\uff1a<\/p>\n<pre><code>SELECT data-&gt;&gt;'name' AS name \nFROM users \nWHERE data-&gt;&gt;'age'::int &gt; 30;<\/code><\/pre>\n<p>\u9019\u6bb5\u4ee3\u78bc\u53ef\u4ee5\u5f9e\u7528\u6236\u8868\u4e2d\u63d0\u53d6\u5e74\u9f61\u5927\u65bc30\u7684\u7528\u6236\u540d\u7a31\uff0c\u5c55\u793a\u4e86PostgreSQL\u5728\u8655\u7406\u975e\u7d50\u69cb\u5316\u6578\u64da\u65b9\u9762\u7684\u9748\u6d3b\u6027\u3002<\/p>\n<h2 id=\"5-%e9%ab%98%e5%8f%af%e7%94%a8%e6%80%a7%e5%92%8c%e6%95%85%e9%9a%9c%e8%bd%89%e7%a7%bb-mfvqCbdrVp\">5. \u9ad8\u53ef\u7528\u6027\u548c\u6545\u969c\u8f49\u79fb<\/h2>\n<p>PostgreSQL\u652f\u6301\u591a\u7a2e\u9ad8\u53ef\u7528\u6027\u89e3\u6c7a\u65b9\u6848\uff0c\u5305\u62ec\u4e3b\u5f9e\u8907\u88fd\u548c\u6d41\u8907\u88fd\u3002\u9019\u4e9b\u529f\u80fd\u4f7f\u5f97\u7528\u6236\u80fd\u5920\u5728\u7cfb\u7d71\u6545\u969c\u6642\u5feb\u901f\u6062\u5fa9\u6578\u64da\uff0c\u78ba\u4fdd\u696d\u52d9\u7684\u9023\u7e8c\u6027\u3002\u6d41\u8907\u88fd\u5141\u8a31\u7528\u6236\u5728\u591a\u500b\u4f3a\u670d\u5668\u4e4b\u9593\u5be6\u6642\u540c\u6b65\u6578\u64da\uff0c\u9019\u5c0d\u65bc\u9700\u8981\u9ad8\u53ef\u7528\u6027\u7684\u61c9\u7528\u81f3\u95dc\u91cd\u8981\u3002<\/p>\n<h2 id=\"6-%e5%ae%89%e5%85%a8%e6%80%a7-mfvqCbdrVp\">6. \u5b89\u5168\u6027<\/h2>\n<p>PostgreSQL\u63d0\u4f9b\u4e86\u591a\u5c64\u6b21\u7684\u5b89\u5168\u6027\u63aa\u65bd\uff0c\u5305\u62ec\u7528\u6236\u8eab\u4efd\u9a57\u8b49\u3001\u89d2\u8272\u7ba1\u7406\u548c\u6578\u64da\u52a0\u5bc6\u3002\u7528\u6236\u53ef\u4ee5\u6839\u64da\u9700\u6c42\u8a2d\u7f6e\u4e0d\u540c\u7684\u8a2a\u554f\u6b0a\u9650\uff0c\u78ba\u4fdd\u6578\u64da\u7684\u5b89\u5168\u6027\u3002\u6b64\u5916\uff0cPostgreSQL\u9084\u652f\u6301SSL\u52a0\u5bc6\uff0c\u4fdd\u8b77\u6578\u64da\u5728\u50b3\u8f38\u904e\u7a0b\u4e2d\u7684\u5b89\u5168\u3002<\/p>\n<h2 id=\"%e7%b8%bd%e7%b5%90-mfvqCbdrVp\">\u7e3d\u7d50<\/h2>\n<p>\u7e3d\u7684\u4f86\u8aaa\uff0cPostgreSQL\u662f\u4e00\u6b3e\u529f\u80fd\u5f37\u5927\u4e14\u9748\u6d3b\u7684\u6578\u64da\u5eab\u7ba1\u7406\u7cfb\u7d71\uff0c\u9069\u5408\u5404\u7a2e\u696d\u52d9\u9700\u6c42\u3002\u5176ACID\u5408\u898f\u6027\u3001\u64f4\u5c55\u6027\u3001\u5c0d\u8907\u96dc\u67e5\u8a62\u7684\u652f\u6301\u3001JSON\u6578\u64da\u8655\u7406\u80fd\u529b\u3001\u9ad8\u53ef\u7528\u6027\u548c\u5b89\u5168\u6027\u7b49\u7279\u9ede\uff0c\u4f7f\u5176\u6210\u70ba\u8a31\u591a\u4f01\u696d\u7684\u9996\u9078\u6578\u64da\u5eab\u89e3\u6c7a\u65b9\u6848\u3002\u5982\u679c\u60a8\u6b63\u5728\u5c0b\u627e\u7a69\u5b9a\u7684\u6578\u64da\u5eab\u89e3\u6c7a\u65b9\u6848\uff0c\u8003\u616e\u4f7f\u7528<a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a>\u4f86\u90e8\u7f72PostgreSQL\uff0c\u5c07\u80fd\u5920\u5145\u5206\u767c\u63ee\u5176\u6f5b\u529b\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u6df1\u5165\u63a2\u8a0ePostgreSQL\u6578\u64da\u5eab\u7684\u6280\u8853\u7279\u9ede\uff0c\u5305\u62ec\u5176\u64f4\u5c55\u6027\u3001\u6027\u80fd\u3001\u5b89\u5168\u6027\u53ca\u652f\u6301\u7684\u6578\u64da\u985e\u578b\uff0c\u52a9\u60a8\u9078\u64c7\u6700\u4f73\u89e3\u6c7a\u65b9\u6848\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-96926","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/96926","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=96926"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/96926\/revisions"}],"predecessor-version":[{"id":96927,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/96926\/revisions\/96927"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=96926"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=96926"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=96926"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}