{"id":66381,"date":"2024-10-14T17:01:15","date_gmt":"2024-10-14T09:01:15","guid":{"rendered":"https:\/\/server.hk\/cnblog\/66381\/"},"modified":"2024-10-14T17:01:16","modified_gmt":"2024-10-14T09:01:16","slug":"mssql%e4%b8%ad%e7%94%a8%e7%ac%a6%e8%99%9f%e5%88%86%e5%88%97%e5%af%a6%e7%8f%be%e6%95%b8%e6%93%9a%e5%88%86%e7%b5%84%ef%bc%88mssql%e7%94%a8%e7%ac%a6%e8%99%9f%e5%88%86%e5%88%97%ef%bc%89","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/66381\/","title":{"rendered":"MSSQL\u4e2d\u7528\u7b26\u865f\u5206\u5217\u5be6\u73fe\u6578\u64da\u5206\u7d44\uff08mssql\u7528\u7b26\u865f\u5206\u5217\uff09"},"content":{"rendered":"

MSSQL\u4e2d\u7528\u7b26\u865f\u5206\u5217\u5be6\u73fe\u6578\u64da\u5206\u7d44<\/h1>\n

\u5728\u6578\u64da\u5eab\u7ba1\u7406\u4e2d\uff0c\u6578\u64da\u7684\u5206\u7d44\u548c\u6574\u7406\u662f\u975e\u5e38\u91cd\u8981\u7684\u4efb\u52d9\u3002\u5c0d\u65bc\u4f7f\u7528Microsoft SQL Server\uff08MSSQL\uff09\u7684\u958b\u767c\u8005\u4f86\u8aaa\uff0c\u5982\u4f55\u6709\u6548\u5730\u5c07\u6578\u64da\u9032\u884c\u5206\u7d44\uff0c\u7279\u5225\u662f\u7576\u6578\u64da\u4e2d\u5305\u542b\u7b26\u865f\u5206\u9694\u7684\u5b57\u7b26\u4e32\u6642\uff0c\u5247\u6210\u70ba\u4e86\u4e00\u500b\u5e38\u898b\u7684\u6311\u6230\u3002\u672c\u6587\u5c07\u63a2\u8a0e\u5982\u4f55\u5728MSSQL\u4e2d\u4f7f\u7528\u7b26\u865f\u5206\u5217\u4f86\u5be6\u73fe\u6578\u64da\u7684\u5206\u7d44\uff0c\u4e26\u63d0\u4f9b\u4e00\u4e9b\u5be6\u7528\u7684\u793a\u4f8b\u548c\u4ee3\u78bc\u7247\u6bb5\u3002<\/p>\n

\u7b26\u865f\u5206\u5217\u7684\u6982\u5ff5<\/h2>\n

\u7b26\u865f\u5206\u5217\u662f\u6307\u5c07\u4e00\u500b\u5b57\u7b26\u4e32\u6839\u64da\u7279\u5b9a\u7684\u5206\u9694\u7b26\uff08\u5982\u9017\u865f\u3001\u5206\u865f\u7b49\uff09\u62c6\u5206\u6210\u591a\u500b\u90e8\u5206\u3002\u5728MSSQL\u4e2d\uff0c\u9019\u4e00\u904e\u7a0b\u53ef\u4ee5\u901a\u904e\u591a\u7a2e\u65b9\u6cd5\u5be6\u73fe\uff0c\u5305\u62ec\u4f7f\u7528\u5167\u5efa\u51fd\u6578\u3001CTE\uff08\u516c\u5171\u8868\u9054\u5f0f\uff09\u6216\u81ea\u5b9a\u7fa9\u51fd\u6578\u7b49\u3002<\/p>\n

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

\u5f9eSQL Server 2016\u958b\u59cb\uff0cMSSQL\u5f15\u5165\u4e86STRING_SPLIT\u51fd\u6578\uff0c\u9019\u4f7f\u5f97\u5b57\u7b26\u4e32\u7684\u5206\u5217\u8b8a\u5f97\u66f4\u52a0\u7c21\u55ae\u3002\u8a72\u51fd\u6578\u63a5\u53d7\u5169\u500b\u53c3\u6578\uff1a\u8981\u5206\u5217\u7684\u5b57\u7b26\u4e32\u548c\u5206\u9694\u7b26\uff0c\u4e26\u8fd4\u56de\u4e00\u500b\u8868\u683c\uff0c\u5176\u4e2d\u5305\u542b\u5206\u5217\u5f8c\u7684\u6240\u6709\u90e8\u5206\u3002<\/p>\n

DECLARE @string NVARCHAR(MAX) = 'apple,banana,cherry';\nSELECT value FROM STRING_SPLIT(@string, ',');\n<\/code><\/pre>\n
\u4e0a\u8ff0\u4ee3\u78bc\u5c07\u8fd4\u56de\u4e09\u884c\uff0c\u5206\u5225\u662f’apple’\u3001’banana’\u548c’cherry’\u3002<\/p>\n
\u6578\u64da\u5206\u7d44\u7684\u5be6\u73fe<\/h2>\n
\u5728\u5be6\u969b\u61c9\u7528\u4e2d\uff0c\u6578\u64da\u5206\u7d44\u901a\u5e38\u9700\u8981\u8207\u5176\u4ed6\u8868\u9032\u884c\u806f\u63a5\uff0c\u4ee5\u4fbf\u7372\u53d6\u66f4\u591a\u7684\u4e0a\u4e0b\u6587\u4fe1\u606f\u3002\u4ee5\u4e0b\u662f\u4e00\u500b\u793a\u4f8b\uff0c\u5c55\u793a\u5982\u4f55\u5c07\u5206\u5217\u7684\u6578\u64da\u8207\u5176\u4ed6\u8868\u9032\u884c\u806f\u63a5\u3002<\/p>\n
WITH SplitData AS (\n    SELECT value\n    FROM STRING_SPLIT('apple,banana,cherry', ',')\n)\nSELECT s.value, COUNT(*) AS Count\nFROM SplitData s\nJOIN SomeOtherTable t ON s.value = t.FruitName\nGROUP BY s.value;\n<\/code><\/pre>\n
\u5728\u9019\u500b\u793a\u4f8b\u4e2d\uff0c\u6211\u5011\u9996\u5148\u4f7f\u7528CTE\u5c07\u5b57\u7b26\u4e32\u5206\u5217\uff0c\u7136\u5f8c\u5c07\u5176\u8207\u53e6\u4e00\u500b\u8868\u9032\u884c\u806f\u63a5\uff0c\u6700\u7d42\u6309\u6c34\u679c\u540d\u7a31\u9032\u884c\u5206\u7d44\u4e26\u8a08\u7b97\u6bcf\u7a2e\u6c34\u679c\u7684\u51fa\u73fe\u6b21\u6578\u3002<\/p>\n
\u4f7f\u7528\u81ea\u5b9a\u7fa9\u51fd\u6578\u9032\u884c\u5206\u5217<\/h2>\n
\u5982\u679c\u9700\u8981\u66f4\u8907\u96dc\u7684\u5206\u5217\u908f\u8f2f\uff0c\u958b\u767c\u8005\u53ef\u4ee5\u8003\u616e\u5275\u5efa\u81ea\u5b9a\u7fa9\u51fd\u6578\u3002\u4ee5\u4e0b\u662f\u4e00\u500b\u7c21\u55ae\u7684\u81ea\u5b9a\u7fa9\u51fd\u6578\u793a\u4f8b\uff0c\u7528\u65bc\u5c07\u5b57\u7b26\u4e32\u5206\u5217\uff1a<\/p>\n
CREATE FUNCTION dbo.SplitString\n(\n    @string NVARCHAR(MAX),\n    @delimiter CHAR(1)\n)\nRETURNS @output TABLE (Value NVARCHAR(MAX))\nAS\nBEGIN\n    DECLARE @start INT, @end INT\n    SET @start = 1\n    SET @end = CHARINDEX(@delimiter, @string)\n\n    WHILE @start <= LEN(@string)\n    BEGIN\n        IF @end = 0 \n            SET @end = LEN(@string) + 1\n\n        INSERT INTO @output (Value) \n        VALUES (SUBSTRING(@string, @start, @end - @start))\n\n        SET @start = @end + 1\n        SET @end = CHARINDEX(@delimiter, @string, @start)\n    END\n\n    RETURN\nEND;\n<\/code><\/pre>\n
\u9019\u500b\u51fd\u6578\u53ef\u4ee5\u7528\u4f86\u5c07\u4efb\u610f\u5b57\u7b26\u4e32\u6839\u64da\u6307\u5b9a\u7684\u5206\u9694\u7b26\u9032\u884c\u5206\u5217\uff0c\u4e26\u8fd4\u56de\u4e00\u500b\u8868\u683c\u3002<\/p>\n
\u7d50\u8ad6<\/h2>\n
\u5728MSSQL\u4e2d\uff0c\u4f7f\u7528\u7b26\u865f\u5206\u5217\u4f86\u5be6\u73fe\u6578\u64da\u5206\u7d44\u662f\u4e00\u500b\u975e\u5e38\u5be6\u7528\u7684\u6280\u5de7\u3002\u7121\u8ad6\u662f\u4f7f\u7528\u5167\u5efa\u7684STRING_SPLIT\u51fd\u6578\uff0c\u9084\u662f\u5275\u5efa\u81ea\u5b9a\u7fa9\u51fd\u6578\uff0c\u958b\u767c\u8005\u90fd\u53ef\u4ee5\u6839\u64da\u5177\u9ad4\u9700\u6c42\u9078\u64c7\u5408\u9069\u7684\u65b9\u6cd5\u3002\u9019\u4e9b\u6280\u8853\u4e0d\u50c5\u80fd\u63d0\u9ad8\u6578\u64da\u8655\u7406\u7684\u6548\u7387\uff0c\u9084\u80fd\u5e6b\u52a9\u958b\u767c\u8005\u66f4\u597d\u5730\u7ba1\u7406\u548c\u5206\u6790\u6578\u64da\u3002<\/p>\n
\u5982\u679c\u60a8\u5c0d\u65bc\u6578\u64da\u5eab\u7ba1\u7406\u6709\u9032\u4e00\u6b65\u7684\u9700\u6c42\uff0c\u6216\u8005\u9700\u8981\u7a69\u5b9a\u7684 VPS<\/a> \u89e3\u6c7a\u65b9\u6848\u4f86\u652f\u6301\u60a8\u7684\u61c9\u7528\uff0c\u8acb\u96a8\u6642\u8a2a\u554f\u6211\u5011\u7684\u7db2\u7ad9\u4ee5\u7372\u53d6\u66f4\u591a\u4fe1\u606f\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
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