{"id":66349,"date":"2024-10-14T16:43:18","date_gmt":"2024-10-14T08:43:18","guid":{"rendered":"https:\/\/server.hk\/cnblog\/66349\/"},"modified":"2024-10-14T16:43:18","modified_gmt":"2024-10-14T08:43:18","slug":"mssql%e4%b8%ad%e5%88%a4%e6%96%b7%e5%ad%97%e6%ae%b5%e5%80%bc%e6%98%af%e5%90%a6%e7%82%ba%e6%95%b8%e5%ad%97%ef%bc%88mssql%e5%88%a4%e6%96%b7%e6%98%af%e5%90%a6%e6%95%b8%e5%ad%97%ef%bc%89","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/66349\/","title":{"rendered":"MSSQL\u4e2d\u5224\u65b7\u5b57\u6bb5\u503c\u662f\u5426\u70ba\u6578\u5b57\uff08mssql\u5224\u65b7\u662f\u5426\u6578\u5b57\uff09"},"content":{"rendered":"<h1 id=\"mssql%e4%b8%ad%e5%88%a4%e6%96%b7%e5%ad%97%e6%ae%b5%e5%80%bc%e6%98%af%e5%90%a6%e7%82%ba%e6%95%b8%e5%ad%97%ef%bc%88mssql%e5%88%a4%e6%96%b7%e6%98%af%e5%90%a6%e6%95%b8%e5%ad%97%ef%bc%89-XcQLZCzIMO\">MSSQL\u4e2d\u5224\u65b7\u5b57\u6bb5\u503c\u662f\u5426\u70ba\u6578\u5b57\uff08mssql\u5224\u65b7\u662f\u5426\u6578\u5b57\uff09<\/h1>\n<p>\u5728\u4f7f\u7528Microsoft SQL Server\uff08MSSQL\uff09\u9032\u884c\u6578\u64da\u5eab\u7ba1\u7406\u6642\uff0c\u7d93\u5e38\u9700\u8981\u5224\u65b7\u67d0\u500b\u5b57\u6bb5\u7684\u503c\u662f\u5426\u70ba\u6578\u5b57\u3002\u9019\u5728\u6578\u64da\u9a57\u8b49\u548c\u6578\u64da\u6e05\u7406\u904e\u7a0b\u4e2d\u5c24\u70ba\u91cd\u8981\uff0c\u56e0\u70ba\u4e0d\u6b63\u78ba\u7684\u6578\u64da\u985e\u578b\u53ef\u80fd\u6703\u5c0e\u81f4\u67e5\u8a62\u932f\u8aa4\u6216\u6578\u64da\u8655\u7406\u554f\u984c\u3002\u672c\u6587\u5c07\u63a2\u8a0e\u5728MSSQL\u4e2d\u5982\u4f55\u6709\u6548\u5730\u5224\u65b7\u5b57\u6bb5\u503c\u662f\u5426\u70ba\u6578\u5b57\uff0c\u4e26\u63d0\u4f9b\u4e00\u4e9b\u5be6\u7528\u7684\u793a\u4f8b\u548c\u4ee3\u78bc\u7247\u6bb5\u3002<\/p>\n<h2 id=\"%e7%82%ba%e4%bb%80%e9%ba%bc%e9%9c%80%e8%a6%81%e5%88%a4%e6%96%b7%e5%ad%97%e6%ae%b5%e5%80%bc%e6%98%af%e5%90%a6%e7%82%ba%e6%95%b8%e5%ad%97-XcQLZCzIMO\">\u70ba\u4ec0\u9ebc\u9700\u8981\u5224\u65b7\u5b57\u6bb5\u503c\u662f\u5426\u70ba\u6578\u5b57<\/h2>\n<p>\u5728\u6578\u64da\u5eab\u4e2d\uff0c\u6578\u64da\u7684\u5b8c\u6574\u6027\u548c\u6e96\u78ba\u6027\u81f3\u95dc\u91cd\u8981\u3002\u7576\u5b57\u6bb5\u61c9\u8a72\u5305\u542b\u6578\u5b57\u6642\uff0c\u82e5\u51fa\u73fe\u975e\u6578\u5b57\u5b57\u7b26\uff0c\u5c07\u53ef\u80fd\u5c0e\u81f4\u4ee5\u4e0b\u554f\u984c\uff1a<\/p>\n<ul>\n<li>\u67e5\u8a62\u932f\u8aa4\uff1a\u5728\u9032\u884c\u6578\u5b78\u904b\u7b97\u6216\u6bd4\u8f03\u6642\uff0c\u975e\u6578\u5b57\u5b57\u7b26\u6703\u5c0e\u81f4\u932f\u8aa4\u3002<\/li>\n<li>\u6578\u64da\u4e0d\u4e00\u81f4\uff1a\u5728\u6578\u64da\u5206\u6790\u548c\u5831\u544a\u4e2d\uff0c\u975e\u6578\u5b57\u6578\u64da\u53ef\u80fd\u6703\u5f71\u97ff\u7d50\u679c\u7684\u6e96\u78ba\u6027\u3002<\/li>\n<li>\u6027\u80fd\u554f\u984c\uff1a\u4e0d\u5fc5\u8981\u7684\u6578\u64da\u985e\u578b\u8f49\u63db\u53ef\u80fd\u6703\u5f71\u97ff\u67e5\u8a62\u6027\u80fd\u3002<\/li>\n<\/ul>\n<h2 id=\"mssql%e4%b8%ad%e5%88%a4%e6%96%b7%e6%98%af%e5%90%a6%e7%82%ba%e6%95%b8%e5%ad%97%e7%9a%84%e6%96%b9%e6%b3%95-XcQLZCzIMO\">MSSQL\u4e2d\u5224\u65b7\u662f\u5426\u70ba\u6578\u5b57\u7684\u65b9\u6cd5<\/h2>\n<p>\u5728MSSQL\u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528\u591a\u7a2e\u65b9\u6cd5\u4f86\u5224\u65b7\u5b57\u6bb5\u503c\u662f\u5426\u70ba\u6578\u5b57\u3002\u4ee5\u4e0b\u662f\u5e7e\u7a2e\u5e38\u898b\u7684\u65b9\u6cd5\uff1a<\/p>\n<h3 id=\"1-%e4%bd%bf%e7%94%a8try_cast%e5%87%bd%e6%95%b8-XcQLZCzIMO\">1. \u4f7f\u7528TRY_CAST\u51fd\u6578<\/h3>\n<p>TRY_CAST\u51fd\u6578\u53ef\u4ee5\u5c07\u4e00\u500b\u8868\u9054\u5f0f\u5617\u8a66\u8f49\u63db\u70ba\u6307\u5b9a\u7684\u6578\u64da\u985e\u578b\u3002\u5982\u679c\u8f49\u63db\u6210\u529f\uff0c\u5247\u8fd4\u56de\u8f49\u63db\u5f8c\u7684\u503c\uff1b\u5982\u679c\u5931\u6557\uff0c\u5247\u8fd4\u56deNULL\u3002\u9019\u4f7f\u5f97\u5b83\u6210\u70ba\u5224\u65b7\u5b57\u6bb5\u503c\u662f\u5426\u70ba\u6578\u5b57\u7684\u6709\u6548\u5de5\u5177\u3002<\/p>\n<pre><code>SELECT \n    column_name,\n    TRY_CAST(column_name AS INT) AS IsNumeric\nFROM \n    your_table\nWHERE \n    TRY_CAST(column_name AS INT) IS NOT NULL;\n<\/code><\/pre>\n<p>\u5728\u9019\u500b\u793a\u4f8b\u4e2d\uff0c\u53ea\u6709\u7576column_name\u80fd\u5920\u6210\u529f\u8f49\u63db\u70ba\u6574\u6578\u6642\uff0c\u8a72\u884c\u624d\u6703\u88ab\u9078\u4e2d\u3002<\/p>\n<h3 id=\"2-%e4%bd%bf%e7%94%a8isnumeric%e5%87%bd%e6%95%b8-XcQLZCzIMO\">2. \u4f7f\u7528ISNUMERIC\u51fd\u6578<\/h3>\n<p>ISNUMERIC\u51fd\u6578\u8fd4\u56de1\uff08\u771f\uff09\u62160\uff08\u5047\uff09\uff0c\u7528\u65bc\u5224\u65b7\u4e00\u500b\u8868\u9054\u5f0f\u662f\u5426\u53ef\u4ee5\u88ab\u89e3\u91cb\u70ba\u6578\u5b57\u3002\u96d6\u7136\u9019\u500b\u51fd\u6578\u7c21\u55ae\u6613\u7528\uff0c\u4f46\u9700\u8981\u6ce8\u610f\u7684\u662f\uff0c\u5b83\u53ef\u80fd\u6703\u8fd4\u56de\u5c0d\u67d0\u4e9b\u975e\u6578\u5b57\u5b57\u7b26\u7684\u8aa4\u5224\u3002<\/p>\n<pre><code>SELECT \n    column_name,\n    ISNUMERIC(column_name) AS IsNumeric\nFROM \n    your_table\nWHERE \n    ISNUMERIC(column_name) = 1;\n<\/code><\/pre>\n<p>\u9019\u6bb5\u4ee3\u78bc\u5c07\u8fd4\u56de\u6240\u6709\u88ab\u5224\u65b7\u70ba\u6578\u5b57\u7684\u884c\uff0c\u4f46\u8981\u5c0f\u5fc3\uff0c\u56e0\u70baISNUMERIC\u5c0d\u67d0\u4e9b\u5b57\u7b26\uff08\u5982\u8ca8\u5e63\u7b26\u865f\uff09\u4e5f\u6703\u8fd4\u56de\u771f\u3002<\/p>\n<h3 id=\"3-%e4%bd%bf%e7%94%a8%e6%ad%a3%e5%89%87%e8%a1%a8%e9%81%94%e5%bc%8f%ef%bc%88sql-server-2016%e5%8f%8a%e4%bb%a5%e4%b8%8a%e7%89%88%e6%9c%ac%ef%bc%89-XcQLZCzIMO\">3. \u4f7f\u7528\u6b63\u5247\u8868\u9054\u5f0f\uff08SQL Server 2016\u53ca\u4ee5\u4e0a\u7248\u672c\uff09<\/h3>\n<p>\u5728SQL Server 2016\u53ca\u4ee5\u4e0a\u7248\u672c\u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528STRING_SPLIT\u548c\u5176\u4ed6\u5b57\u7b26\u4e32\u51fd\u6578\u4f86\u5be6\u73fe\u66f4\u8907\u96dc\u7684\u5224\u65b7\u908f\u8f2f\u3002\u96d6\u7136SQL Server\u672c\u8eab\u4e0d\u652f\u6301\u6b63\u5247\u8868\u9054\u5f0f\uff0c\u4f46\u53ef\u4ee5\u901a\u904e\u81ea\u5b9a\u7fa9\u51fd\u6578\u4f86\u5be6\u73fe\u3002<\/p>\n<pre><code>CREATE FUNCTION dbo.IsNumeric(@value NVARCHAR(255))\nRETURNS BIT\nAS\nBEGIN\n    RETURN CASE \n        WHEN @value LIKE '%[^0-9]%' THEN 0 \n        ELSE 1 \n    END\nEND;\n<\/code><\/pre>\n<p>\u7136\u5f8c\u53ef\u4ee5\u9019\u6a23\u4f7f\u7528\u9019\u500b\u51fd\u6578\uff1a<\/p>\n<pre><code>SELECT \n    column_name,\n    dbo.IsNumeric(column_name) AS IsNumeric\nFROM \n    your_table\nWHERE \n    dbo.IsNumeric(column_name) = 1;\n<\/code><\/pre>\n<h2 id=\"%e7%b8%bd%e7%b5%90-XcQLZCzIMO\">\u7e3d\u7d50<\/h2>\n<p>\u5728MSSQL\u4e2d\u5224\u65b7\u5b57\u6bb5\u503c\u662f\u5426\u70ba\u6578\u5b57\u662f\u6578\u64da\u7ba1\u7406\u4e2d\u7684\u4e00\u500b\u91cd\u8981\u6b65\u9a5f\u3002\u901a\u904e\u4f7f\u7528TRY_CAST\u3001ISNUMERIC\u51fd\u6578\u6216\u81ea\u5b9a\u7fa9\u51fd\u6578\uff0c\u6211\u5011\u53ef\u4ee5\u6709\u6548\u5730\u9a57\u8b49\u6578\u64da\u7684\u6b63\u78ba\u6027\u3002\u9019\u4e0d\u50c5\u6709\u52a9\u65bc\u63d0\u9ad8\u6578\u64da\u7684\u5b8c\u6574\u6027\uff0c\u9084\u80fd\u907f\u514d\u5728\u6578\u64da\u8655\u7406\u904e\u7a0b\u4e2d\u51fa\u73fe\u7684\u6f5b\u5728\u932f\u8aa4\u3002<\/p>\n<p>\u5982\u679c\u60a8\u6b63\u5728\u5c0b\u627e\u9ad8\u6548\u7684\u6578\u64da\u7ba1\u7406\u89e3\u6c7a\u65b9\u6848\uff0c\u8003\u616e\u4f7f\u7528<a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a>\u4f86\u652f\u6301\u60a8\u7684\u6578\u64da\u5eab\u9700\u6c42\u3002\u7121\u8ad6\u662f\u6578\u64da\u5b58\u5132\u9084\u662f\u8655\u7406\uff0c\u9078\u64c7\u5408\u9069\u7684\u670d\u52d9\u5668\u90fd\u80fd\u63d0\u5347\u60a8\u7684\u696d\u52d9\u6548\u7387\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5728MSSQL\u4e2d\uff0c\u4f7f\u7528ISNUMERIC()\u51fd\u6578\u5224\u65b7\u5b57\u6bb5\u503c\u662f\u5426\u70ba\u6578\u5b57\uff0c\u78ba\u4fdd\u6578\u64da\u7684\u6709\u6548\u6027\u548c\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-66349","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/66349","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=66349"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/66349\/revisions"}],"predecessor-version":[{"id":66350,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/66349\/revisions\/66350"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=66349"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=66349"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=66349"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}