\u95ee\u9898\u63cf\u8ff0<\/p>\n
\u5047\u8bbe\u6709\u5f20\u5b66\u751f\u6210\u7ee9\u8868(CJ)\u5982\u4e0b<\/p>\n
\r\nName Subject Result\r\n\u5f20\u4e09 \u8bed\u6587 80\r\n\u5f20\u4e09 \u6570\u5b66 90\r\n\u5f20\u4e09 \u7269\u7406 85\r\n\u674e\u56db \u8bed\u6587 85\r\n\u674e\u56db \u6570\u5b66 92\r\n\u674e\u56db \u7269\u7406 82\r\n<\/pre>\n\u73b0\u5728 \u60f3\u5199 sql \u8bed\u53e5 \u67e5\u8be2\u540e\u7ed3\u679c \u4e3a<\/p>\n
\r\n\u59d3\u540d \u8bed\u6587 \u6570\u5b66 \u7269\u7406\r\n\u5f20\u4e09 80 90 85\r\n\u674e\u56db 85 92 82\r\n<\/pre>\n\u8be5\u600e\u4e48\u5b9e\u73b0 \uff1f<\/p>\n
\u7814\u7a76\u610f\u4e49<\/p>\n
\u8fd9\u662f\u4e2a\u5e76\u4e0d\u590d\u6742\u7684\u95ee\u9898\uff0c\u4f46\u5374\u662f\u6570\u636e\u5e93\u4e2d\u884c\u8f6c\u5217\u7684\u4e00\u4e2a\u5178\u578b\u4f8b\u5b50\uff0c\u53ea\u8981\u628a\u8fd9\u4e2a\u62bd\u8c61\u51fa\u6765\u7684\u5177\u6709\u666e\u904d\u610f\u4e49\u7684\u95ee\u9898\u7814\u7a76\u900f\u5f7b\uff0c\u5176\u4ed6\u7c7b\u4f3c\u7684\u590d\u6742\u95ee\u9898\u8fce\u5203\u800c\u89e3\u3002<\/p>\n
\u95ee\u9898\u5206\u6790<\/p>\n
\u9996\u5148\u4ecb\u7ecd\u4e0b\u884c\u8f6c\u5217\u7684\u6982\u5ff5\uff0c\u4e5f\u8bb8\u4e66\u4e0a\u5e76\u6ca1\u6709\u8fd9\u4e2a\u6982\u5ff5\uff0c\u884c\u8f6c\u5217\u8bf4\u7684\u662f\u8fd9\u6837\u4e00\u7c7b\u95ee\u9898\uff1a\u6709\u65f6\u5019\u4e3a\u4e86\u6570\u636e\u5e93\u8868\u7684\u8bbe\u8ba1\u6ee1\u8db3\u7528\u6237\u7684\u52a8\u6001\u8981\u6c42\uff08\u6bd4\u5982\u6dfb\u52a0\u5b57\u6bb5\uff09\uff0c\u6211\u4eec\u91c7\u7528\u5b9a\u4e49\u5b57\u6bb5\u540d\u8868\uff0c\u7136\u540e\u5b9a\u4e49\u4e00\u4e2a\u5b57\u6bb5\u503c\u7684\u8868\uff0c\u8fd9\u6837\u5c31\u8fbe\u5230\u4e86\u7528\u9759\u6001\u6765\u8868\u8fbe\u52a8\u6001\uff0c\u6362\u53e5\u8bdd\u8bf4\u5c31\u662f\u628a\u6570\u636e\u5e93\u8868\u4e2d\u672c\u6765\u5e94\u8be5\u662f\u6a2a\u5411\u7684\u5ef6\u4f38\u8f6c\u5316\u4e3a\u7eb5\u5411\u7684\u5ef6\u4f38\uff0c\u518d\u6362\u53e5\u8bdd\u8bf4\u5c31\u662f\u628a\u6570\u636e\u5e93\u8868\u4e2d\u672c\u6765\u5e94\u8be5\u662f\u5b57\u6bb5\u7684\u589e\u52a0\u8f6c\u5316\u4e3a\u8bb0\u5f55\u6761\u6570\u7684\u589e\u52a0\u3002\u7136\u800c\uff0c\u5728\u8fd9\u6837\u8bbe\u8ba1\u4e0b\uff0c\u56fa\u7136\u7075\u6d3b\uff0c\u786e\u5e26\u6765\u4e86\u7edf\u8ba1\u5206\u6790\u7684\u9ebb\u70e6\uff0c\u56e0\u4e3a\u7edf\u8ba1\u5206\u6790\u65f6\uff0c\u5e94\u8be5\u662f\u4ee5\u76f4\u89c2\u7684\u5f62\u5f0f\u8fdb\u884c\u8868\u73b0\u3002\u6362\u8a00\u4e4b\uff0c\u7edf\u8ba1\u5206\u6790\u65f6\uff0c\u6211\u4eec\u53c8\u5e94\u8be5\u663e\u793a\u4e3a\u5b57\u6bb5\u66f4\u591a\u7684\u90a3\u79cd\u3002\u5982\u679c\u540c\u65f6\u505a\u5230\u4e86\u6570\u636e\u5b58\u50a8\u65f6\u5217\u7684\u589e\u52a0\u8f6c\u5316\u4e3a\u884c\u7684\u589e\u52a0\uff0c\u6570\u636e\u63d0\u53d6\u65f6\u53c8\u53ef\u5f97\u5230\u5217\u589e\u52a0\u4e86\u7684\u6570\u636e\uff0c\u6570\u636e\u5e93\u8868\u7684\u8fd9\u79cd\u8bbe\u8ba1\u5c31\u5bf9\u7528\u6237\u900f\u660e\u4e86\u3002<\/p>\n
\u672c\u6587\u524d\u9762\u63d0\u51fa\u7684\u8fd9\u4e2a\u95ee\u9898\u5c31\u662f\u4e00\u4e2a\u5178\u578b\u7684\u5728\u6570\u636e\u63d0\u53d6\u65f6\u8981\u628a\u4ee5\u884c\u589e\u52a0\u5f62\u5f0f\u7684\u6570\u636e\u8f6c\u5316\u4e3a\u4ee5\u5217\u589e\u52a0\u5f62\u5f0f\u7684\u6570\u636e\u3002\u4e3a\u4ec0\u4e48\u8fd9\u6837\u8bf4\u5462\uff1f\u6211\u4eec\u6ce8\u610fsubject\u5b57\u6bb5\uff0csubject\u91cc\u7684\u5185\u5bb9\u5728\u6570\u636e\u5e93\u5b58\u50a8\u65f6\u662f\u4ee5\u4e0d\u540c\u6570\u636e\u884c\u7684\u5f62\u5f0f\uff0c\u6362\u8a00\u4e4b\uff0c\u662f\u4ee5\u884c\u589e\u52a0\u7684\u5f62\u5f0f\uff0c\u800c\u8f93\u51fa\u65f6\uff0c\u8fd9\u91cc\u9762\u7684\u5185\u5bb9\u6211\u4eec\u8981\u53d8\u6210\u5b57\u6bb5\u540d\u4e86\u3002<\/p>\n
\u8861\u91cf\u8fd9\u4e2a\u95ee\u9898\u89e3\u51b3\u597d\u574f\u6211\u4eec\u6709\u51e0\u4e2a\u6807\u51c6\uff1a1.\u5f53\u6570\u636e\u6b63\u597d\u5c31\u662f\u4e0a\u9762\u8fd9\u4e2a\u6837\u5b50\u65f6\uff0c\u89e3\u51b3\u529e\u6cd5\u80fd\u5426\u5f97\u5230\u6b63\u786e\u7684\u89e3\uff1b2.\u5982\u679c\u589e\u52a0\u79d1\u76ee\u4e86\u79d1\u76ee\u7684\u79cd\u7c7b\uff0c\u89e3\u51b3\u65b9\u6cd5\u662f\u5426\u4ecd\u7136\u80fd\u884c\u5f97\u901a\uff1b3.\u5982\u679c\u6709\u4e9b\u4eba\u7684\u67d0\u4eec\u8bfe\u7a0b\u7684\u6210\u7ee9\u8fd8\u6ca1\u6709\u4e0b\u6765\uff0c\u6362\u8a00\u4e4b\uff0c\u6570\u636e\u5e93\u4e2d\u4e0d\u662f\u6bcf\u4e2a\u4eba\u6bcf\u95e8\u8bfe\u7684\u6210\u7ee9\u90fd\u53ef\u4ee5\u627e\u5230\uff0c\u6570\u636e\u5e93\u7f3a\u5c11\u67d0\u4e2a\u4eba\u67d0\u95e8\u8bfe\u7684\u6210\u7ee9\u7684\u8bb0\u5f55\u3002\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\u7a0b\u5e8f\u8fd8\u80fd\u5426\u5f97\u5230\u5408\u7406\u7684\u7ed3\u679c\u3002<\/p>\n
\u8bd5\u9a8c\u73af\u5883<\/p>\n
\u672c\u8bd5\u9a8c\u4f7f\u7528MS SQL Server 2005\u73af\u5883\u6d4b\u8bd5\u3002<\/p>\n
\u8bd5\u9a8c\u8fc7\u7a0b<\/p>\n
1.\u5efa\u7acb\u6570\u636e\u8868\uff0c\u5f55\u5165\u6570\u636e<\/p>\n
\r\nCREATE TABLE [dbo].[CJ](\r\n[name] [varchar](50) COLLATE Chinese_PRC_CI_AS NOT NULL,\r\n[subject] [varchar](50) COLLATE Chinese_PRC_CI_AS NOT NULL,\r\n[result] [int] NULL,\r\nCONSTRAINT [PK_CJ] PRIMARY KEY CLUSTERED\r\n(\r\n[name] ASC,\r\n[subject] ASC\r\n)WITH (IGNORE_DUP_KEY = OFF) ON [PRIMARY]\r\n) ON [PRIMARY]\r\n<\/pre>\n\u901a\u8fc7\u53ef\u89c6\u5316\u754c\u9762\u6216\u8005\u7528insert\u8bed\u53e5\u5f55\u5165\u6570\u636e<\/p>\n
2.\u7b2c\u4e00\u4e2a\u6700\u76f4\u63a5\uff0c\u6700\u7b80\u5355\u7684\u505a\u6cd5<\/p>\n
\r\nselect distinct c.[name] as \u59d3\u540d,\r\n(select result from CJ where [name] = c.[name] and subject = \u2018\u8bed\u6587\u2019 )as \u8bed\u6587,\r\n(select result from CJ where [name] = c.[name] and subject = \u2018\u6570\u5b66\u2019 )as \u6570\u5b66,\r\n(select result from CJ where [name] = c.[name] and subject = \u2018\u7269\u7406\u2019 )as \u7269\u7406\r\nfrom CJ c\r\n<\/pre>\n\u4e3b\u8981\u601d\u60f3\u5c31\u662f\u628a\u4efb\u52a1\u5206\u6210\u4e24\u6b65\uff0c\u7b2c\u4e00\u6b65\uff1a\u628a\u7b2c\u4e00\u5217\u751f\u6210\u51fa\u6765\u3002\u7b2c\u4e8c\u6b65\uff1a\u6839\u636e\u7b2c\u4e00\u5217\u6bcf\u884c\u7684\u59d3\u540d\u53d6\u503c\uff0c\u67e5\u8be2\u8be5\u540c\u5b66\u7684\u5404\u79d1\u6210\u7ee9join\u5230\u7b2c\u4e00\u6b65\u751f\u6210\u7684\u53ea\u6709\u4e00\u5217\u8868\u3002distinct\u4e0d\u80fd\u7701\u7565\u3002<\/p>\n
\u8be5\u65b9\u6cd5\u80fd\u591f\u5b8c\u6210\u8be5\u4efb\u52a1\uff0c\u4f46\u53ea\u80fd\u6ee1\u8db3\u524d\u6587\u6240\u8ff0\u7684\u8bc4\u4ef7\u6807\u51c61\u548c\u6807\u51c63\u3002\u5f53\u79d1\u76ee\u589e\u591a\u6216\u8005\u5b9e\u9645\u79d1\u76ee\u6ca1\u6709\u8fd9\u4e48\u591a\u65f6\u7edf\u8ba1\u7684\u7ed3\u679c\u5c31\u4e0d\u90a3\u4e48\u5b8c\u7f8e\u4e86\u3002\u6362\u8a00\u4e4b\uff0c\u8fd9\u79cd\u65b9\u6cd5\u662f\u9759\u6001\u7684\uff0c\u5c06\u79d1\u76ee\u5728sql\u8bed\u53e5\u91cc\u5199\u6b7b\u4e86\u3002\u53e6\u5916\u4e2d\u95f4\u7684\u51e0\u4e2asql\u8bed\u53e5\u67e5\u8be2\u6548\u7387\u4f3c\u4e4e\u5e76\u4e0d\u90a3\u4e48\u9ad8\uff0c\u8fd8\u9700\u8981\u626b\u63cf\u6574\u4e2a\u8868\uff0c\u5b9e\u9645\u4e0a\u5e94\u8be5\u53ea\u9700\u8981\u5728\u4e00\u4e2a\u5b66\u751f\u5bf9\u5e94\u7684\u51e0\u6761\u8bb0\u5f55\u91cc\u627e\u5c31\u53ef\u4ee5\u4e86\u3002<\/p>\n
3.\u8f83\u597d\u7684\u529e\u6cd5<\/p>\n
\u5148\u4e0d\u7ba1\u6807\u51c62\uff0c\u60f3\u60f3\u80fd\u4e0d\u80fd\u89e3\u51b3\u90a3\u4e2a\u626b\u63cf\u7684\u6548\u7387\u95ee\u9898\u3002\u4e8e\u662f\u5f97\u5230\u4e86\u4e0b\u9762\u7684\u529e\u6cd5\u3002<\/p>\n
\r\nselect [name] as \u59d3\u540d,\r\nsum(case when subject=\u2019\u8bed\u6587\u2019 then result end) as \u8bed\u6587,\r\nsum(case when subject=\u2019\u6570\u5b66\u2019 then result end) as \u6570\u5b66,\r\nsum(case when subject=\u2019\u7269\u7406\u2019 then result end) as \u7269\u7406\r\nfrom CJ group by [name]\r\n<\/pre>\n\u8be5\u529e\u6cd5\u5927\u81f4\u601d\u60f3\u7c7b\u4f3c\u524d\u4e00\u79cd\u3002\u6700\u5927\u7684\u6539\u8fdb\u662f\u7528\u4e86group by\uff0c\u7531\u4e8e\u7528\u4e86group by\u540e\u5b57\u6bb5\u540d\u9664\u4e86group by\u7684\u90a3\u4e2a\u5176\u4ed6\u4e0d\u80fd\u76f4\u63a5\u7528\uff0c\u52a0\u4e86\u4e2a\u96c6\u51fd\u6570\uff0c\u5b9e\u9645\u4e0a\u8fd9\u4e2aSum\u53ea\u4f1a\u52a0\u4e00\u9879\uff0c\u56e0\u4e3a\u8fd9\u4e2a\u8868\u7684\u4e3b\u952e\u662fname + subject\u3002\u7528\u4e86group by\u5c31\u4f1a\u89e3\u51b3\u626b\u63cf\u7684\u6548\u7387\u95ee\u9898\uff0c\u56e0\u4e3asum\u662f\u8ba1\u7b97\u7684\u6bcf\u4e2a\u5206\u7ec4\u4e4b\u7c7b\u7684\u3002\u672c\u65b9\u6cd5\u7684\u6280\u5de7\u4e4b\u5904\u5728\u4e8ecase when\u7684\u4f7f\u7528\u3002<\/p>\n
\u8fd9\u4e2a\u529e\u6cd5\u8fd8\u662f\u4e0d\u80fd\u6ee1\u8db3\u6807\u51c62\u3002<\/p>\n
4.\u8f83\u5b8c\u7f8e\u7684\u529e\u6cd5<\/p>\n
\u73b0\u5728\u5c31\u662f\u600e\u4e48\u89e3\u51b3subject\u201c\u7531\u6b7b\u5230\u6d3b\u201d\u7684\u95ee\u9898\u3002\u60f3\u5230\u4e86\u4e00\u79cd\u529e\u6cd5\u5982\u4e0b\uff1a<\/p>\n
\r\ndeclare @s nvarchar(1000)\r\nselect @s = \u2018select [name] as \u59d3\u540d\u2019\r\nselect @s = @s + \u2018,sum(case when subject=\u201d\u2019 + cast(subject as varchar) + \u201d\u2019 then result end) as \u2018 + subject from CJ group by subject\r\nselect @s = @s + \u2018 from CJ group by [name]\u2018\r\nexec(@s)\r\n<\/pre>\n\u5176\u5b9e\u601d\u60f3\u662f\u57fa\u4e8e\u524d\u9762\u90a3\u79cd\u529e\u6cd5\u7684\uff0c\u5173\u952e\u7684\u5730\u65b9\u5c31\u662f\u901a\u8fc7\u52a8\u6001\u751f\u6210sql\u8bed\u53e5\uff0c\u7136\u540e\u6267\u884c\u4e4b\u3002<\/p>\n
\u5728@s\u7684\u7b2c\u4e00\u6b21\u7d2f\u52a0\u4e2d\u7684\u4ee3\u7801\u4e2d\u4e00\u53e5from CJ group by subject\u5f88\u662f\u6709\u6280\u5de7\u6027\uff0c\u53ef\u89c1\u7b80\u5355\u7684select * from table t where .. \u4e5f\u662f\u8fd9\u4e48\u53d8\u5316\u65e0\u7a77\uff0c\u4e0d\u5f97\u4e0d\u4f69\u670dsql\u6216\u8005\u8bf4\u5173\u7cfb\u578b\u6570\u636e\u5e93\u7684\u667a\u6167\u3002<\/p>\n
\u672c\u4eba\u6536\u83b7<\/p>\n
a.\u8ba4\u771f\u7684\u5206\u6790\u4e00\u4e2a\u7b80\u5355\u7684\u95ee\u9898\u7684\u6765\u9f99\u53bb\u8109\u662f\u5f88\u6709\u610f\u4e49\u7684\u4e8b\u60c5\uff0c\u6d6e\u8e81\u7684\u5b66\u98ce\u4f1a\u8ba9\u4f60\u82b1\u8d39\u5927\u91cf\u7684\u65f6\u95f4\u7ed3\u679c\u4e00\u65e0\u6240\u83b7\u3002<\/p>\n
b.\u89e3\u51b3\u4e00\u4e2a\u95ee\u9898\u8981\u6709\u6e05\u6670\u7684\u601d\u8def\uff0c\u5728\u4e00\u65f6\u4e0d\u77e5\u9053\u5b8c\u7f8e\u7684\u7b54\u6848\u65f6\uff0c\u53ef\u8bd5\u56fe\u4e00\u6b65\u4e00\u6b65\u4f18\u5316\uff0c\u5411\u5b8c\u7f8e\u7684\u65b9\u5411\u9760\u8fd1\u3002<\/p>\n
c.\u8981\u5584\u4e8e\u5206\u6790\u95ee\u9898\u7684\u75c7\u7ed3\u6240\u5728\uff0c\u5373\u6293\u4f4f\u95ee\u9898\u7684\u672c\u8d28\u3002<\/p>\n
\u5199\u5230\u6700\u540e<\/p>\n
\u8fd9\u4e2a\u95ee\u9898\u6682\u65f6\u5c31\u8bf4\u5230\u8fd9\u91cc\uff0c\u4e4b\u6240\u4ee5\u628a\u6587\u7ae0\u5199\u51fa\u6765\u662f\u57fa\u4e8e\u4e24\u4e2a\u76ee\u7684\uff0c\u9996\u5148\uff0c\u4f5c\u4e3a\u5b66\u4e60\u5fc3\u5f97\uff0c\u4e0d\u6562\u72ec\u4eab\uff0c\u5e0c\u671b\u66f4\u591a\u7684\u4eba\u80fd\u4ece\u4e2d\u5f97\u5230\u542f\u53d1\u3002\u5176\u6b21\uff0c\u7b80\u5355\u7684\u95ee\u9898\u4e5f\u5305\u542b\u5f88\u591a\u9ad8\u6df1\u7684\u77e5\u8bc6\uff0c\u5e0c\u671b\u66f4\u591a\u7684\u9ad8\u624b\u80fd\u52a0\u5165\u63a2\u8ba8\uff0c\u5206\u6790\u672c\u6587\u7684\u4e0d\u5f53\u4e4b\u5904\uff0c\u5e76\u7ed9\u51fa\u66f4\u597d\u7684\u529e\u6cd5\uff0c\u6216\u8005\u63d0\u4f9b\u66f4\u591a\u7684\u7c7b\u4f3c\u7684\u4f8b\u5b50\uff0c\u672c\u6587\u5e0c\u671b\u8d77\u5230\u629b\u7816\u5f15\u7389\u7684\u4f5c\u7528\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
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