{"id":143793,"date":"2024-11-01T01:17:19","date_gmt":"2024-10-31T17:17:19","guid":{"rendered":"https:\/\/server.hk\/cnblog\/143793\/"},"modified":"2024-11-01T01:17:20","modified_gmt":"2024-10-31T17:17:20","slug":"sql-%e9%bb%9e%e6%bb%b4%e4%b9%8b%e7%94%a2%e7%94%9f%e6%99%82%e9%96%93-dimension%ef%bc%8c%e4%b8%bb%e8%a6%81%e6%98%af%e6%99%82%e9%96%93%e8%bd%89%e6%8f%9b","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/143793\/","title":{"rendered":"SQL \u9ede\u6ef4\u4e4b\u7522\u751f\u6642\u9593 dimension\uff0c\u4e3b\u8981\u662f\u6642\u9593\u8f49\u63db"},"content":{"rendered":"<h1 id=\"sql-%e9%bb%9e%e6%bb%b4%e4%b9%8b%e7%94%a2%e7%94%9f%e6%99%82%e9%96%93-dimension%ef%bc%8c%e4%b8%bb%e8%a6%81%e6%98%af%e6%99%82%e9%96%93%e8%bd%89%e6%8f%9b-nWfcNGThId\">SQL \u9ede\u6ef4\u4e4b\u7522\u751f\u6642\u9593 dimension\uff0c\u4e3b\u8981\u662f\u6642\u9593\u8f49\u63db<\/h1>\n<p>\u5728\u6578\u64da\u5eab\u7ba1\u7406\u4e2d\uff0c\u6642\u9593\u7dad\u5ea6\u662f\u4e00\u500b\u91cd\u8981\u7684\u6982\u5ff5\uff0c\u5c24\u5176\u662f\u5728\u9032\u884c\u6578\u64da\u5206\u6790\u548c\u5831\u544a\u6642\u3002\u6642\u9593\u7dad\u5ea6\u4e0d\u50c5\u80fd\u5e6b\u52a9\u6211\u5011\u7406\u89e3\u6578\u64da\u7684\u8b8a\u5316\u8da8\u52e2\uff0c\u9084\u80fd\u5728\u67e5\u8a62\u4e2d\u63d0\u4f9b\u66f4\u9ad8\u7684\u9748\u6d3b\u6027\u3002\u672c\u6587\u5c07\u63a2\u8a0e\u5982\u4f55\u5728 SQL \u4e2d\u751f\u6210\u6642\u9593\u7dad\u5ea6\uff0c\u4e26\u91cd\u9ede\u4ecb\u7d39\u6642\u9593\u8f49\u63db\u7684\u6280\u5de7\u3002<\/p>\n<h2 id=\"%e4%bb%80%e9%ba%bc%e6%98%af%e6%99%82%e9%96%93%e7%b6%ad%e5%ba%a6%ef%bc%9f-nWfcNGThId\">\u4ec0\u9ebc\u662f\u6642\u9593\u7dad\u5ea6\uff1f<\/h2>\n<p>\u6642\u9593\u7dad\u5ea6\u662f\u6307\u5728\u6578\u64da\u5eab\u4e2d\u7528\u4f86\u8868\u793a\u6642\u9593\u7684\u7d50\u69cb\uff0c\u901a\u5e38\u5305\u62ec\u5e74\u3001\u6708\u3001\u65e5\u3001\u6642\u3001\u5206\u3001\u79d2\u7b49\u5c6c\u6027\u3002\u9019\u4e9b\u5c6c\u6027\u53ef\u4ee5\u5e6b\u52a9\u7528\u6236\u9032\u884c\u6642\u9593\u7bc4\u570d\u67e5\u8a62\u3001\u805a\u5408\u8a08\u7b97\u548c\u5831\u544a\u751f\u6210\u3002\u6642\u9593\u7dad\u5ea6\u7684\u8a2d\u8a08\u901a\u5e38\u6703\u8003\u616e\u5230\u696d\u52d9\u9700\u6c42\uff0c\u4e26\u4e14\u53ef\u4ee5\u6839\u64da\u5177\u9ad4\u60c5\u6cc1\u9032\u884c\u64f4\u5c55\u3002<\/p>\n<h2 id=\"%e7%94%9f%e6%88%90%e6%99%82%e9%96%93%e7%b6%ad%e5%ba%a6%e7%9a%84%e5%9f%ba%e6%9c%ac%e6%96%b9%e6%b3%95-nWfcNGThId\">\u751f\u6210\u6642\u9593\u7dad\u5ea6\u7684\u57fa\u672c\u65b9\u6cd5<\/h2>\n<p>\u5728 SQL \u4e2d\u751f\u6210\u6642\u9593\u7dad\u5ea6\u7684\u5e38\u898b\u65b9\u6cd5\u662f\u4f7f\u7528\u905e\u8ff4\u67e5\u8a62\u6216\u751f\u6210\u5e8f\u5217\u3002\u4ee5\u4e0b\u662f\u4e00\u500b\u4f7f\u7528\u905e\u8ff4\u67e5\u8a62\u751f\u6210\u6642\u9593\u7dad\u5ea6\u7684\u793a\u4f8b\uff1a<\/p>\n<pre><code>WITH RECURSIVE DateDimension AS (\n    SELECT CAST('2023-01-01' AS DATE) AS DateValue\n    UNION ALL\n    SELECT DATEADD(DAY, 1, DateValue)\n    FROM DateDimension\n    WHERE DateValue &lt; '2023-12-31'\n)\nSELECT * FROM DateDimension;<\/code><\/pre>\n<p>\u4e0a\u8ff0\u67e5\u8a62\u5c07\u751f\u6210\u5f9e 2023 \u5e74 1 \u6708 1 \u65e5\u5230 2023 \u5e74 12 \u6708 31 \u65e5\u7684\u6240\u6709\u65e5\u671f\u3002\u9019\u6a23\u7684\u6642\u9593\u7dad\u5ea6\u53ef\u4ee5\u7528\u65bc\u5f8c\u7e8c\u7684\u6578\u64da\u5206\u6790\u3002<\/p>\n<h2 id=\"%e6%99%82%e9%96%93%e8%bd%89%e6%8f%9b%e7%9a%84%e6%8a%80%e5%b7%a7-nWfcNGThId\">\u6642\u9593\u8f49\u63db\u7684\u6280\u5de7<\/h2>\n<p>\u5728\u8655\u7406\u6642\u9593\u6578\u64da\u6642\uff0c\u6642\u9593\u8f49\u63db\u662f\u4e00\u500b\u5e38\u898b\u7684\u9700\u6c42\u3002SQL \u63d0\u4f9b\u4e86\u591a\u7a2e\u51fd\u6578\u4f86\u9032\u884c\u6642\u9593\u8f49\u63db\uff0c\u4ee5\u4e0b\u662f\u4e00\u4e9b\u5e38\u7528\u7684\u6642\u9593\u8f49\u63db\u51fd\u6578\uff1a<\/p>\n<ul>\n<li><strong>CAST<\/strong>\uff1a\u5c07\u4e00\u500b\u6578\u64da\u985e\u578b\u8f49\u63db\u70ba\u53e6\u4e00\u500b\u6578\u64da\u985e\u578b\u3002<\/li>\n<li><strong>CONVERT<\/strong>\uff1a\u63d0\u4f9b\u66f4\u9748\u6d3b\u7684\u683c\u5f0f\u9078\u64c7\uff0c\u7279\u5225\u662f\u5728\u65e5\u671f\u548c\u6642\u9593\u7684\u683c\u5f0f\u5316\u4e0a\u3002<\/li>\n<li><strong>DATEPART<\/strong>\uff1a\u63d0\u53d6\u65e5\u671f\u7684\u7279\u5b9a\u90e8\u5206\uff0c\u4f8b\u5982\u5e74\u3001\u6708\u3001\u65e5\u7b49\u3002<\/li>\n<\/ul>\n<p>\u4ee5\u4e0b\u662f\u4e00\u500b\u4f7f\u7528 <code>CONVERT<\/code> \u51fd\u6578\u9032\u884c\u6642\u9593\u683c\u5f0f\u8f49\u63db\u7684\u793a\u4f8b\uff1a<\/p>\n<pre><code>SELECT CONVERT(VARCHAR, GETDATE(), 120) AS FormattedDate;<\/code><\/pre>\n<p>\u9019\u6bb5\u4ee3\u78bc\u5c07\u7576\u524d\u65e5\u671f\u6642\u9593\u8f49\u63db\u70ba &#8216;YYYY-MM-DD HH:MI:SS&#8217; \u7684\u683c\u5f0f\uff0c\u65b9\u4fbf\u5728\u5831\u544a\u4e2d\u4f7f\u7528\u3002<\/p>\n<h2 id=\"%e6%99%82%e9%96%93%e7%b6%ad%e5%ba%a6%e7%9a%84%e6%87%89%e7%94%a8%e5%a0%b4%e6%99%af-nWfcNGThId\">\u6642\u9593\u7dad\u5ea6\u7684\u61c9\u7528\u5834\u666f<\/h2>\n<p>\u6642\u9593\u7dad\u5ea6\u5728\u8a31\u591a\u5834\u666f\u4e2d\u90fd\u975e\u5e38\u6709\u7528\uff0c\u4ee5\u4e0b\u662f\u4e00\u4e9b\u5e38\u898b\u7684\u61c9\u7528\u5834\u666f\uff1a<\/p>\n<ul>\n<li><strong>\u92b7\u552e\u5831\u544a<\/strong>\uff1a\u901a\u904e\u6642\u9593\u7dad\u5ea6\uff0c\u53ef\u4ee5\u8f15\u9b06\u751f\u6210\u6309\u6708\u6216\u6309\u5b63\u5ea6\u7684\u92b7\u552e\u5831\u544a\u3002<\/li>\n<li><strong>\u7db2\u7ad9\u6d41\u91cf\u5206\u6790<\/strong>\uff1a\u5206\u6790\u7db2\u7ad9\u5728\u4e0d\u540c\u6642\u9593\u6bb5\u7684\u6d41\u91cf\u8b8a\u5316\uff0c\u5e6b\u52a9\u512a\u5316\u71df\u92b7\u7b56\u7565\u3002<\/li>\n<li><strong>\u8ca1\u52d9\u5831\u8868<\/strong>\uff1a\u751f\u6210\u6309\u5e74\u6216\u6309\u6708\u7684\u8ca1\u52d9\u5831\u8868\uff0c\u4fbf\u65bc\u7ba1\u7406\u5c64\u505a\u51fa\u6c7a\u7b56\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b5%90%e8%ab%96-nWfcNGThId\">\u7d50\u8ad6<\/h2>\n<p>\u6642\u9593\u7dad\u5ea6\u7684\u751f\u6210\u548c\u6642\u9593\u8f49\u63db\u5728 SQL \u6578\u64da\u5eab\u4e2d\u626e\u6f14\u8457\u91cd\u8981\u89d2\u8272\u3002\u901a\u904e\u5408\u7406\u7684\u8a2d\u8a08\u548c\u4f7f\u7528\uff0c\u80fd\u5920\u6709\u6548\u63d0\u5347\u6578\u64da\u5206\u6790\u7684\u6548\u7387\u548c\u6e96\u78ba\u6027\u3002\u7121\u8ad6\u662f\u5728\u92b7\u552e\u5831\u544a\u3001\u7db2\u7ad9\u6d41\u91cf\u5206\u6790\u9084\u662f\u8ca1\u52d9\u5831\u8868\u4e2d\uff0c\u6642\u9593\u7dad\u5ea6\u90fd\u80fd\u63d0\u4f9b\u95dc\u9375\u7684\u652f\u6301\u3002<\/p>\n<p>\u5982\u679c\u60a8\u5c0d\u65bc\u5982\u4f55\u5728\u6578\u64da\u5eab\u4e2d\u6709\u6548\u7ba1\u7406\u6642\u9593\u7dad\u5ea6\u6709\u9032\u4e00\u6b65\u7684\u8208\u8da3\uff0c\u6216\u9700\u8981\u66f4\u5c08\u696d\u7684\u89e3\u6c7a\u65b9\u6848\uff0c\u6b61\u8fce\u8a2a\u554f\u6211\u5011\u7684\u7db2\u7ad9\u4e86\u89e3\u66f4\u591a\u8cc7\u8a0a\u3002\u60a8\u53ef\u4ee5\u67e5\u770b\u6211\u5011\u7684 <a href=\"https:\/\/server.hk\">VPS<\/a> \u670d\u52d9\uff0c\u7372\u5f97\u66f4\u9ad8\u6548\u7684\u6578\u64da\u8655\u7406\u80fd\u529b\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u63a2\u7d22 SQL \u9ede\u6ef4\u4e2d\u7684\u6642\u9593\u7dad\u5ea6\uff0c\u5b78\u7fd2\u5982\u4f55\u9032\u884c\u6642\u9593\u8f49\u63db\uff0c\u63d0\u5347\u6578\u64da\u5206\u6790\u6548\u7387\u8207\u6e96\u78ba\u6027\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-143793","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/143793","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=143793"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/143793\/revisions"}],"predecessor-version":[{"id":143794,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/143793\/revisions\/143794"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=143793"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=143793"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=143793"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}