{"id":194929,"date":"2024-11-13T10:46:20","date_gmt":"2024-11-13T02:46:20","guid":{"rendered":"https:\/\/server.hk\/cnblog\/194929\/"},"modified":"2024-11-13T10:46:21","modified_gmt":"2024-11-13T02:46:21","slug":"%e7%94%a8sql%e8%87%aa%e5%ae%9a%e7%be%a9%e5%87%bd%e6%95%b8%e7%b5%b1%e8%a8%88%e5%ad%97%e9%80%97%e8%99%9f%e5%88%86%e9%9a%94%e7%ac%a6%e7%9a%84%e5%ad%97%e7%ac%a6%e7%b8%bd%e5%80%8b%e6%95%b8","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/194929\/","title":{"rendered":"\u7528SQL\u81ea\u5b9a\u7fa9\u51fd\u6578\u7d71\u8a08\u5b57\u9017\u865f\u5206\u9694\u7b26\u7684\u5b57\u7b26\u7e3d\u500b\u6578"},"content":{"rendered":"

\u7528SQL\u81ea\u5b9a\u7fa9\u51fd\u6578\u7d71\u8a08\u5b57\u9017\u865f\u5206\u9694\u7b26\u7684\u5b57\u7b26\u7e3d\u500b\u6578<\/h1>\n

\u5728\u6578\u64da\u5eab\u7ba1\u7406\u4e2d\uff0cSQL\uff08\u7d50\u69cb\u5316\u67e5\u8a62\u8a9e\u8a00\uff09\u662f\u4e00\u7a2e\u5f37\u5927\u7684\u5de5\u5177\uff0c\u80fd\u5920\u5e6b\u52a9\u7528\u6236\u9032\u884c\u6578\u64da\u7684\u67e5\u8a62\u548c\u64cd\u4f5c\u3002\u7576\u6211\u5011\u9700\u8981\u8655\u7406\u5305\u542b\u9017\u865f\u5206\u9694\u7684\u5b57\u7b26\u4e32\u6642\uff0c\u8a08\u7b97\u9019\u4e9b\u5b57\u7b26\u4e32\u4e2d\u7684\u5b57\u7b26\u7e3d\u500b\u6578\u53ef\u80fd\u6703\u8b8a\u5f97\u8907\u96dc\u3002\u672c\u6587\u5c07\u4ecb\u7d39\u5982\u4f55\u4f7f\u7528SQL\u81ea\u5b9a\u7fa9\u51fd\u6578\u4f86\u7d71\u8a08\u5b57\u4e32\u4e2d\u9017\u865f\u5206\u9694\u7b26\u7684\u5b57\u7b26\u7e3d\u500b\u6578\uff0c\u4e26\u63d0\u4f9b\u76f8\u61c9\u7684\u793a\u4f8b\u4ee3\u78bc\u3002<\/p>\n

\u7406\u89e3\u9017\u865f\u5206\u9694\u7684\u5b57\u7b26\u4e32<\/h2>\n

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\u81ea\u5b9a\u7fa9\u51fd\u6578\u7684\u5275\u5efa<\/h2>\n

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CREATE FUNCTION CountCharacters(@inputString NVARCHAR(MAX))\nRETURNS INT\nAS\nBEGIN\n    DECLARE @totalCount INT = 0;\n    DECLARE @currentString NVARCHAR(MAX);\n    \n    -- \u5c07\u5b57\u7b26\u4e32\u6309\u9017\u865f\u5206\u9694\n    DECLARE @delimiter CHAR(1) = ',';\n    DECLARE @position INT = CHARINDEX(@delimiter, @inputString);\n    \n    WHILE @position > 0\n    BEGIN\n        -- \u7372\u53d6\u7576\u524d\u5b50\u5b57\u7b26\u4e32\n        SET @currentString = LEFT(@inputString, @position - 1);\n        -- \u8a08\u7b97\u7576\u524d\u5b50\u5b57\u7b26\u4e32\u7684\u5b57\u7b26\u6578\n        SET @totalCount = @totalCount + LEN(@currentString);\n        -- \u66f4\u65b0\u8f38\u5165\u5b57\u7b26\u4e32\uff0c\u53bb\u6389\u5df2\u8655\u7406\u7684\u90e8\u5206\n        SET @inputString = SUBSTRING(@inputString, @position + 1, LEN(@inputString));\n        -- \u7e7c\u7e8c\u67e5\u627e\u4e0b\u4e00\u500b\u9017\u865f\n        SET @position = CHARINDEX(@delimiter, @inputString);\n    END\n    \n    -- \u8a08\u7b97\u6700\u5f8c\u4e00\u500b\u5b50\u5b57\u7b26\u4e32\u7684\u5b57\u7b26\u6578\n    SET @totalCount = @totalCount + LEN(@inputString);\n    \n    RETURN @totalCount;\nEND;\n<\/code><\/pre>\n
\u4f7f\u7528\u81ea\u5b9a\u7fa9\u51fd\u6578<\/h2>\n
\u5275\u5efa\u5b8c\u81ea\u5b9a\u7fa9\u51fd\u6578\u5f8c\uff0c\u6211\u5011\u53ef\u4ee5\u5728\u67e5\u8a62\u4e2d\u4f7f\u7528\u5b83\u4f86\u8a08\u7b97\u9017\u865f\u5206\u9694\u5b57\u7b26\u4e32\u7684\u5b57\u7b26\u7e3d\u500b\u6578\u3002\u4ee5\u4e0b\u662f\u4e00\u500b\u793a\u4f8b\u67e5\u8a62\uff0c\u5c55\u793a\u5982\u4f55\u4f7f\u7528\u6211\u5011\u525b\u525b\u5275\u5efa\u7684\u51fd\u6578\uff1a<\/p>\n
SELECT dbo.CountCharacters('apple,banana,cherry,dates') AS TotalCharacters;\n<\/code><\/pre>\n
\u9019\u500b\u67e5\u8a62\u5c07\u8fd4\u56de\u5b57\u7b26\u4e32\u4e2d\u6240\u6709\u5b57\u7b26\u7684\u7e3d\u500b\u6578\uff0c\u5305\u62ec\u9017\u865f\u524d\u7684\u6240\u6709\u5b57\u7b26\u3002<\/p>\n
\u6027\u80fd\u8003\u91cf<\/h2>\n
\u5728\u8655\u7406\u5927\u91cf\u6578\u64da\u6642\uff0c\u81ea\u5b9a\u7fa9\u51fd\u6578\u7684\u6027\u80fd\u53ef\u80fd\u6703\u6210\u70ba\u4e00\u500b\u554f\u984c\u3002\u7279\u5225\u662f\u7576\u5b57\u7b26\u4e32\u9577\u5ea6\u8f03\u5927\u6216\u6578\u64da\u91cf\u9f90\u5927\u6642\uff0c\u8a08\u7b97\u5b57\u7b26\u7e3d\u500b\u6578\u7684\u904e\u7a0b\u53ef\u80fd\u6703\u8b8a\u5f97\u7de9\u6162\u3002\u56e0\u6b64\uff0c\u5728\u5be6\u969b\u61c9\u7528\u4e2d\uff0c\u5efa\u8b70\u5c0d\u6027\u80fd\u9032\u884c\u6e2c\u8a66\uff0c\u4e26\u6839\u64da\u9700\u8981\u9032\u884c\u512a\u5316\u3002<\/p>\n
\u7d50\u8ad6<\/h2>\n
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\u5982\u679c\u60a8\u5c0d\u65bc\u6578\u64da\u5eab\u7ba1\u7406\u6216\u5176\u4ed6\u76f8\u95dc\u6280\u8853\u6709\u8208\u8da3\uff0c\u6b61\u8fce\u8a2a\u554f\u6211\u5011\u7684\u7db2\u7ad9\u4e86\u89e3\u66f4\u591a\u8cc7\u8a0a\u3002\u6211\u5011\u63d0\u4f9b\u5404\u7a2e VPS<\/a> \u89e3\u6c7a\u65b9\u6848\uff0c\u5e6b\u52a9\u60a8\u66f4\u597d\u5730\u7ba1\u7406\u548c\u904b\u884c\u60a8\u7684\u61c9\u7528\u7a0b\u5e8f\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
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