{"id":66111,"date":"2024-10-14T14:35:17","date_gmt":"2024-10-14T06:35:17","guid":{"rendered":"https:\/\/server.hk\/cnblog\/66111\/"},"modified":"2024-10-14T14:35:17","modified_gmt":"2024-10-14T06:35:17","slug":"mssql%e5%af%a6%e7%8f%be%e4%b8%80%e8%a1%8c%e6%95%b8%e6%93%9a%e6%8b%86%e5%88%86%e6%88%90%e5%a4%9a%e8%a1%8c%e7%9a%84%e6%8a%80%e5%b7%a7%ef%bc%88mssql%e4%b8%80%e8%a1%8c%e6%8b%86%e5%a4%9a%e8%a1%8c%ef%bc%89","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/66111\/","title":{"rendered":"MSSQL\u5be6\u73fe\u4e00\u884c\u6578\u64da\u62c6\u5206\u6210\u591a\u884c\u7684\u6280\u5de7\uff08mssql\u4e00\u884c\u62c6\u591a\u884c\uff09"},"content":{"rendered":"

MSSQL\u5be6\u73fe\u4e00\u884c\u6578\u64da\u62c6\u5206\u6210\u591a\u884c\u7684\u6280\u5de7\uff08mssql\u4e00\u884c\u62c6\u591a\u884c\uff09<\/h1>\n

\u5728\u6578\u64da\u5eab\u7ba1\u7406\u4e2d\uff0c\u7d93\u5e38\u6703\u9047\u5230\u9700\u8981\u5c07\u4e00\u884c\u6578\u64da\u62c6\u5206\u6210\u591a\u884c\u7684\u60c5\u6cc1\u3002\u9019\u5728\u8655\u7406\u67d0\u4e9b\u7279\u5b9a\u683c\u5f0f\u7684\u6578\u64da\u6642\u5c24\u70ba\u91cd\u8981\uff0c\u4f8b\u5982\u7576\u4e00\u500b\u5b57\u6bb5\u4e2d\u5305\u542b\u591a\u500b\u7528\u9017\u865f\u5206\u9694\u7684\u503c\u6642\u3002\u672c\u6587\u5c07\u63a2\u8a0e\u5728Microsoft SQL Server\uff08MSSQL\uff09\u4e2d\u5be6\u73fe\u9019\u4e00\u529f\u80fd\u7684\u5e7e\u7a2e\u6280\u5de7\u3002<\/p>\n

\u4f7f\u7528STRING_SPLIT\u51fd\u6578<\/h2>\n

\u5f9eSQL Server 2016\u958b\u59cb\uff0cMSSQL\u5f15\u5165\u4e86STRING_SPLIT<\/strong>\u51fd\u6578\uff0c\u9019\u662f\u4e00\u500b\u975e\u5e38\u65b9\u4fbf\u7684\u5de5\u5177\uff0c\u53ef\u4ee5\u5c07\u4e00\u500b\u5b57\u7b26\u4e32\u62c6\u5206\u6210\u591a\u884c\u3002\u4ee5\u4e0b\u662f\u4f7f\u7528\u6b64\u51fd\u6578\u7684\u57fa\u672c\u8a9e\u6cd5\uff1a<\/p>\n

SELECT value\nFROM STRING_SPLIT('apple,banana,cherry', ',');<\/code><\/pre>\n
\u9019\u6bb5\u4ee3\u78bc\u5c07\u8fd4\u56de\u4e09\u884c\u6578\u64da\uff0c\u5206\u5225\u662f\u201capple\u201d\u3001\u201cbanana\u201d\u548c\u201ccherry\u201d\u3002\u9019\u5c0d\u65bc\u7c21\u55ae\u7684\u6578\u64da\u62c6\u5206\u975e\u5e38\u6709\u6548\u3002<\/p>\n
\u4f7f\u7528XML\u548cCROSS APPLY<\/h2>\n
\u5c0d\u65bc\u65e9\u671f\u7248\u672c\u7684SQL Server\uff0c\u6216\u8005\u7576\u9700\u8981\u66f4\u8907\u96dc\u7684\u62c6\u5206\u908f\u8f2f\u6642\uff0c\u53ef\u4ee5\u4f7f\u7528XML\u548cCROSS APPLY<\/strong>\u4f86\u5be6\u73fe\u3002\u4ee5\u4e0b\u662f\u4e00\u500b\u793a\u4f8b\uff1a<\/p>\n
DECLARE @data NVARCHAR(MAX) = 'apple,banana,cherry';\n\nSELECT LTRIM(RTRIM(m.n.value('.[1]', 'NVARCHAR(MAX)'))) AS value\nFROM (SELECT CAST('' + REPLACE(@data, ',', '') + '' AS XML) AS x) AS t\nCROSS APPLY x.nodes('\/M') AS m(n);<\/code><\/pre>\n
\u9019\u6bb5\u4ee3\u78bc\u9996\u5148\u5c07\u5b57\u7b26\u4e32\u8f49\u63db\u70baXML\u683c\u5f0f\uff0c\u7136\u5f8c\u4f7f\u7528CROSS APPLY\u5c07\u6bcf\u500b\u5143\u7d20\u63d0\u53d6\u70ba\u55ae\u7368\u7684\u884c\u3002\u9019\u7a2e\u65b9\u6cd5\u7684\u9748\u6d3b\u6027\u4f7f\u5176\u9069\u7528\u65bc\u66f4\u8907\u96dc\u7684\u6578\u64da\u7d50\u69cb\u3002<\/p>\n
\u4f7f\u7528\u905e\u6b78CTE<\/h2>\n
\u53e6\u4e00\u7a2e\u65b9\u6cd5\u662f\u4f7f\u7528\u905e\u6b78\u516c\u5171\u8868\u9054\u5f0f\uff08CTE\uff09\u3002\u9019\u7a2e\u65b9\u6cd5\u9069\u5408\u65bc\u9700\u8981\u8655\u7406\u591a\u5c64\u5d4c\u5957\u7684\u60c5\u6cc1\u3002\u4ee5\u4e0b\u662f\u4e00\u500b\u793a\u4f8b\uff1a<\/p>\n
WITH RecursiveCTE AS (\n    SELECT CAST(LEFT(@data, CHARINDEX(',', @data + ',') - 1) AS NVARCHAR(MAX)) AS value,\n           STUFF(@data, 1, CHARINDEX(',', @data + ','), '') AS rest\n    UNION ALL\n    SELECT CAST(LEFT(rest, CHARINDEX(',', rest + ',') - 1) AS NVARCHAR(MAX)),\n           STUFF(rest, 1, CHARINDEX(',', rest + ','), '')\n    FROM RecursiveCTE\n    WHERE rest  ''\n)\nSELECT value FROM RecursiveCTE;<\/code><\/pre>\n
\u9019\u6bb5\u4ee3\u78bc\u901a\u904e\u905e\u6b78\u7684\u65b9\u5f0f\u9010\u6b65\u63d0\u53d6\u6bcf\u500b\u503c\uff0c\u76f4\u5230\u6240\u6709\u503c\u90fd\u88ab\u8655\u7406\u5b8c\u7562\u3002\u9019\u7a2e\u65b9\u6cd5\u5728\u8655\u7406\u8907\u96dc\u7684\u6578\u64da\u6642\u975e\u5e38\u6709\u7528\u3002<\/p>\n
\u6027\u80fd\u8003\u91cf<\/h2>\n
\u5728\u9078\u64c7\u62c6\u5206\u6578\u64da\u7684\u65b9\u6cd5\u6642\uff0c\u6027\u80fd\u662f\u4e00\u500b\u91cd\u8981\u7684\u8003\u91cf\u56e0\u7d20\u3002STRING_SPLIT<\/strong>\u51fd\u6578\u5728\u8655\u7406\u5927\u91cf\u6578\u64da\u6642\u901a\u5e38\u8868\u73fe\u826f\u597d\uff0c\u4f46\u5728\u67d0\u4e9b\u60c5\u6cc1\u4e0b\uff0c\u4f7f\u7528XML\u6216CTE\u53ef\u80fd\u6703\u66f4\u6709\u6548\u3002\u56e0\u6b64\uff0c\u6839\u64da\u5177\u9ad4\u7684\u6578\u64da\u91cf\u548c\u7d50\u69cb\u9078\u64c7\u5408\u9069\u7684\u65b9\u6cd5\u662f\u81f3\u95dc\u91cd\u8981\u7684\u3002<\/p>\n
\u7e3d\u7d50<\/h2>\n
\u5728MSSQL\u4e2d\uff0c\u5c07\u4e00\u884c\u6578\u64da\u62c6\u5206\u6210\u591a\u884c\u7684\u6280\u5de7\u6709\u591a\u7a2e\u9078\u64c7\uff0c\u5305\u62ec\u4f7f\u7528STRING_SPLIT<\/strong>\u51fd\u6578\u3001XML\u548cCROSS APPLY\u3001\u4ee5\u53ca\u905e\u6b78CTE\u7b49\u3002\u6839\u64da\u5177\u9ad4\u9700\u6c42\u9078\u64c7\u5408\u9069\u7684\u65b9\u6cd5\uff0c\u53ef\u4ee5\u6709\u6548\u63d0\u9ad8\u6578\u64da\u8655\u7406\u7684\u6548\u7387\u3002\u5c0d\u65bc\u9700\u8981\u9ad8\u6548\u6578\u64da\u8655\u7406\u7684\u7528\u6236\uff0c\u9078\u64c7\u5408\u9069\u7684VPS<\/a><\/strong>\u6216\u9999\u6e2f\u4f3a\u670d\u5668<\/a><\/strong>\u89e3\u6c7a\u65b9\u6848\u5c07\u6709\u52a9\u65bc\u63d0\u5347\u6574\u9ad4\u6027\u80fd\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
\u63a2\u7d22MSSQL\u4e2d\u5c07\u4e00\u884c\u6578\u64da\u62c6\u5206\u6210\u591a\u884c\u7684\u6280\u5de7\uff0c\u63d0\u5347\u6578\u64da\u8655\u7406\u6548\u7387\uff0c\u7c21\u5316\u67e5\u8a62\u548c\u5831\u544a\u751f\u6210\u904e\u7a0b\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-66111","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/66111","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=66111"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/66111\/revisions"}],"predecessor-version":[{"id":66112,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/66111\/revisions\/66112"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=66111"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=66111"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=66111"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}