{"id":178726,"date":"2024-11-08T20:23:20","date_gmt":"2024-11-08T12:23:20","guid":{"rendered":"https:\/\/server.hk\/cnblog\/178726\/"},"modified":"2024-11-08T20:23:21","modified_gmt":"2024-11-08T12:23:21","slug":"%e5%a6%82%e4%bd%95%e4%bf%ae%e5%be%a9postgresql%e9%8c%af%e8%aa%a4%e4%bb%a3%e7%a2%bc%ef%bc%9a22016-invalid_argument_for_nth_value_function%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/178726\/","title":{"rendered":"\u5982\u4f55\u4fee\u5fa9PostgreSQL\u932f\u8aa4\u4ee3\u78bc\uff1a22016 &#8211; invalid_argument_for_nth_value_function\uff1f"},"content":{"rendered":"<h1 id=\"%e5%a6%82%e4%bd%95%e4%bf%ae%e5%be%a9postgresql%e9%8c%af%e8%aa%a4%e4%bb%a3%e7%a2%bc%ef%bc%9a22016-invalid_argument_for_nth_value_function-ymLubBHtZl\">\u5982\u4f55\u4fee\u5fa9PostgreSQL\u932f\u8aa4\u4ee3\u78bc\uff1a22016 &#8211; invalid_argument_for_nth_value_function<\/h1>\n<p>\u5728\u4f7f\u7528PostgreSQL\u9032\u884c\u6578\u64da\u5eab\u64cd\u4f5c\u6642\uff0c\u958b\u767c\u8005\u53ef\u80fd\u6703\u9047\u5230\u5404\u7a2e\u932f\u8aa4\u4ee3\u78bc\uff0c\u5176\u4e2d\u4e4b\u4e00\u5c31\u662f\u932f\u8aa4\u4ee3\u78bc22016\uff0c\u8a72\u932f\u8aa4\u901a\u5e38\u8207\u4f7f\u7528 <code>NTH_VALUE<\/code> \u51fd\u6578\u6642\u7684\u53c3\u6578\u4e0d\u6b63\u78ba\u6709\u95dc\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0e\u9019\u500b\u932f\u8aa4\u7684\u539f\u56e0\u53ca\u5176\u89e3\u6c7a\u65b9\u6848\uff0c\u5e6b\u52a9\u958b\u767c\u8005\u66f4\u6709\u6548\u5730\u8655\u7406\u6b64\u554f\u984c\u3002<\/p>\n<h2 id=\"%e4%bb%80%e9%ba%bc%e6%98%afnth_value%e5%87%bd%e6%95%b8%ef%bc%9f-ymLubBHtZl\">\u4ec0\u9ebc\u662fNTH_VALUE\u51fd\u6578\uff1f<\/h2>\n<p><code>NTH_VALUE<\/code> \u51fd\u6578\u662f\u4e00\u500b\u7a97\u53e3\u51fd\u6578\uff0c\u7528\u65bc\u8fd4\u56de\u5728\u7a97\u53e3\u5167\u7684\u7b2cN\u500b\u503c\u3002\u9019\u500b\u51fd\u6578\u7684\u57fa\u672c\u8a9e\u6cd5\u5982\u4e0b\uff1a<\/p>\n<pre><code>NTH_VALUE(expression, n) OVER (PARTITION BY partition_expression ORDER BY order_expression)\n<\/code><\/pre>\n<p>\u5176\u4e2d\uff0c<code>expression<\/code> \u662f\u8981\u8fd4\u56de\u7684\u503c\uff0c<code>n<\/code> \u662f\u8981\u8fd4\u56de\u7684\u7b2cN\u500b\u503c\uff0c<code>PARTITION BY<\/code> \u7528\u65bc\u5c07\u6578\u64da\u5206\u7d44\uff0c\u800c <code>ORDER BY<\/code> \u5247\u7528\u65bc\u5b9a\u7fa9\u6392\u5e8f\u9806\u5e8f\u3002<\/p>\n<h2 id=\"%e9%8c%af%e8%aa%a4%e4%bb%a3%e7%a2%bc22016%e7%9a%84%e5%8e%9f%e5%9b%a0-ymLubBHtZl\">\u932f\u8aa4\u4ee3\u78bc22016\u7684\u539f\u56e0<\/h2>\n<p>\u7576\u4f7f\u7528 <code>NTH_VALUE<\/code> \u51fd\u6578\u6642\uff0c\u5982\u679c\u63d0\u4f9b\u7684\u53c3\u6578\u4e0d\u7b26\u5408\u8981\u6c42\uff0c\u5c31\u6703\u51fa\u73fe\u932f\u8aa4\u4ee3\u78bc22016\u3002\u9019\u901a\u5e38\u767c\u751f\u5728\u4ee5\u4e0b\u60c5\u6cc1\uff1a<\/p>\n<ul>\n<li><strong>\u7121\u6548\u7684N\u503c\uff1a<\/strong> \u5982\u679c\u63d0\u4f9b\u7684N\u503c\u5c0f\u65bc1\uff0c\u5247\u6703\u5c0e\u81f4\u6b64\u932f\u8aa4\u3002<\/li>\n<li><strong>\u7a97\u53e3\u5167\u6c92\u6709\u8db3\u5920\u7684\u884c\uff1a<\/strong> \u5982\u679c\u7a97\u53e3\u5167\u7684\u884c\u6578\u5c11\u65bcN\uff0c\u5247\u7121\u6cd5\u8fd4\u56de\u7b2cN\u500b\u503c\u3002<\/li>\n<li><strong>\u4e0d\u6b63\u78ba\u7684\u6578\u64da\u985e\u578b\uff1a<\/strong> \u5982\u679c <code>expression<\/code> \u7684\u6578\u64da\u985e\u578b\u4e0d\u6b63\u78ba\uff0c\u4e5f\u53ef\u80fd\u5c0e\u81f4\u932f\u8aa4\u3002<\/li>\n<\/ul>\n<h2 id=\"%e5%a6%82%e4%bd%95%e4%bf%ae%e5%be%a9%e9%8c%af%e8%aa%a4%e4%bb%a3%e7%a2%bc22016-ymLubBHtZl\">\u5982\u4f55\u4fee\u5fa9\u932f\u8aa4\u4ee3\u78bc22016<\/h2>\n<p>\u8981\u4fee\u5fa9\u6b64\u932f\u8aa4\uff0c\u958b\u767c\u8005\u53ef\u4ee5\u63a1\u53d6\u4ee5\u4e0b\u5e7e\u500b\u6b65\u9a5f\uff1a<\/p>\n<h3 id=\"1-%e6%aa%a2%e6%9f%a5n%e5%80%bc-ymLubBHtZl\">1. \u6aa2\u67e5N\u503c<\/h3>\n<p>\u78ba\u4fdd\u50b3\u905e\u7d66 <code>NTH_VALUE<\/code> \u51fd\u6578\u7684N\u503c\u5927\u65bc0\u3002\u4f8b\u5982\uff1a<\/p>\n<pre><code>SELECT NTH_VALUE(column_name, 1) OVER (PARTITION BY group_column ORDER BY order_column) AS first_value\nFROM table_name;\n<\/code><\/pre>\n<h3 id=\"2-%e7%a2%ba%e8%aa%8d%e7%aa%97%e5%8f%a3%e5%85%a7%e7%9a%84%e8%a1%8c%e6%95%b8-ymLubBHtZl\">2. \u78ba\u8a8d\u7a97\u53e3\u5167\u7684\u884c\u6578<\/h3>\n<p>\u5728\u4f7f\u7528 <code>NTH_VALUE<\/code> \u51fd\u6578\u4e4b\u524d\uff0c\u6aa2\u67e5\u7a97\u53e3\u5167\u7684\u884c\u6578\u662f\u5426\u8db3\u5920\u3002\u4f8b\u5982\uff0c\u53ef\u4ee5\u4f7f\u7528 <code>ROW_NUMBER()<\/code> \u51fd\u6578\u4f86\u78ba\u4fdd\u6709\u8db3\u5920\u7684\u884c\uff1a<\/p>\n<pre><code>WITH ranked_data AS (\n    SELECT column_name, ROW_NUMBER() OVER (PARTITION BY group_column ORDER BY order_column) AS rn\n    FROM table_name\n)\nSELECT NTH_VALUE(column_name, 1) OVER (PARTITION BY group_column ORDER BY order_column) AS first_value\nFROM ranked_data\nWHERE rn &gt;= 1;\n<\/code><\/pre>\n<h3 id=\"3-%e6%aa%a2%e6%9f%a5%e6%95%b8%e6%93%9a%e9%a1%9e%e5%9e%8b-ymLubBHtZl\">3. \u6aa2\u67e5\u6578\u64da\u985e\u578b<\/h3>\n<p>\u78ba\u4fdd <code>expression<\/code> \u7684\u6578\u64da\u985e\u578b\u8207\u9810\u671f\u76f8\u7b26\u3002\u5982\u679c\u9700\u8981\uff0c\u53ef\u4ee5\u4f7f\u7528\u985e\u578b\u8f49\u63db\u4f86\u4fee\u6b63\u6578\u64da\u985e\u578b\u554f\u984c\uff1a<\/p>\n<pre><code>SELECT NTH_VALUE(CAST(column_name AS desired_type), 1) OVER (PARTITION BY group_column ORDER BY order_column) AS first_value\nFROM table_name;\n<\/code><\/pre>\n<h2 id=\"%e7%b8%bd%e7%b5%90-ymLubBHtZl\">\u7e3d\u7d50<\/h2>\n<p>PostgreSQL\u932f\u8aa4\u4ee3\u78bc22016\u901a\u5e38\u662f\u7531\u65bc\u4e0d\u6b63\u78ba\u7684\u53c3\u6578\u50b3\u905e\u7d66 <code>NTH_VALUE<\/code> \u51fd\u6578\u6240\u5f15\u8d77\u7684\u3002\u901a\u904e\u6aa2\u67e5N\u503c\u3001\u78ba\u8a8d\u7a97\u53e3\u5167\u7684\u884c\u6578\u4ee5\u53ca\u6aa2\u67e5\u6578\u64da\u985e\u578b\uff0c\u958b\u767c\u8005\u53ef\u4ee5\u6709\u6548\u5730\u4fee\u5fa9\u6b64\u932f\u8aa4\u3002\u5c0d\u65bc\u9700\u8981\u7a69\u5b9a\u548c\u9ad8\u6548\u6578\u64da\u5eab\u89e3\u6c7a\u65b9\u6848\u7684\u7528\u6236\uff0c\u9078\u64c7\u5408\u9069\u7684 <a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a> \u6216 <a href=\"https:\/\/server.hk\">\u96f2\u4f3a\u670d\u5668<\/a> \u670d\u52d9\u5c07\u6709\u52a9\u65bc\u63d0\u5347\u6574\u9ad4\u6027\u80fd\u548c\u53ef\u9760\u6027\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4e86\u89e3\u5982\u4f55\u4fee\u5fa9PostgreSQL\u932f\u8aa4\u4ee3\u78bc22016\uff0c\u89e3\u6c7anth_value\u51fd\u6578\u7684\u7121\u6548\u53c3\u6578\u554f\u984c\uff0c\u63d0\u5347\u6578\u64da\u67e5\u8a62\u6548\u7387\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-178726","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/178726","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=178726"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/178726\/revisions"}],"predecessor-version":[{"id":178727,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/178726\/revisions\/178727"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=178726"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=178726"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=178726"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}