{"id":289,"date":"2024-04-06T09:59:05","date_gmt":"2024-04-06T09:59:05","guid":{"rendered":"http:\/\/www.keshebang.com\/?p=289"},"modified":"2024-04-17T13:41:09","modified_gmt":"2024-04-17T13:41:09","slug":"sql-server%e6%9f%a5%e8%af%a2%e7%bb%93%e6%9e%9c%e8%a1%8c%e8%bd%ac%e5%88%97","status":"publish","type":"post","link":"http:\/\/www.keshebang.com\/?p=289","title":{"rendered":"sql server\u67e5\u8be2\u7ed3\u679c\u884c\u8f6c\u5217"},"content":{"rendered":"\n

sql\u67e5\u8be2\u7ed3\u679c\u884c\u8f6c\u5217\u662f\u5c06\u67e5\u8be2\u6570\u636e\u7684\u591a\u884c\u8f6c\u4e3a\u4e00\u5217\u663e\u793a\uff0c\u66f4\u4e3a\u76f4\u89c2\u3002\u5982\u4e0b\u793a\u4f8b\uff1a<\/p>\n\n\n\n

\u539f\u59cb\u6570\u636e\uff1a<\/p>\n\n\n\n

\u5b66\u53f7<\/td>\u59d3\u540d<\/td>\u8bfe\u7a0b<\/td>\u5206\u6570<\/td><\/tr>
1001<\/td>\u5f20\u4e09<\/td>\u8bed\u6587<\/td>85<\/td><\/tr>
1001<\/td>\u5f20\u4e09<\/td>\u6570\u5b66<\/td>92<\/td><\/tr>
1001<\/td>\u5f20\u4e09<\/td>\u82f1\u8bed<\/td>90<\/td><\/tr>
1002<\/td>\u674e\u56db<\/td>\u8bed\u6587<\/td>88<\/td><\/tr>
1002<\/td>\u674e\u56db<\/td>\u6570\u5b66<\/td>96<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

\u6700\u7ec8\u5c55\u793a\u6548\u679c\uff1a<\/p>\n\n\n\n

\u5b66\u53f7<\/td>\u59d3\u540d<\/td>\u8bed\u6587<\/td>\u6570\u5b66<\/td>\u82f1\u8bed<\/td><\/tr>
1001<\/td>\u5f20\u4e09<\/td>85<\/td>92<\/td>90<\/td><\/tr>
1002<\/td>\u674e\u56db<\/td>88<\/td>96<\/td><\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

\u6d4b\u8bd5\u6570\u636e\u51c6\u5907(\u590d\u5236\u8fd0\u884c\u5373\u53ef\uff09:<\/p>\n\n\n\n

create table tb_test
(sno char(4) ,
sname varchar(10),
course varchar(10),
score decimal(3,1))<\/p>\n\n\n\n

insert into tb_test values('1001','\u5f20\u4e09','\u8bed\u6587',85)
insert into tb_test values('1001','\u5f20\u4e09','\u6570\u5b66',92)
insert into tb_test values('1001','\u5f20\u4e09','\u82f1\u8bed',90)
insert into tb_test values('1002','\u674e\u56db','\u8bed\u6587',88)
insert into tb_test values('1002','\u674e\u56db','\u6570\u5b66',96)<\/p>\n\n\n\n

1\u3001case when \u65b9\u6cd5<\/h2>\n\n\n\n

select sno '\u5b66\u53f7',sname '\u59d3\u540d',
sum(case when course='\u8bed\u6587' then score end) as '\u8bed\u6587',
sum(case when course='\u6570\u5b66' then score end) as '\u6570\u5b66',
sum(case when course='\u82f1\u8bed' then score end) as '\u82f1\u8bed'
from tb_test
group by sno,sname<\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n

sum \u6362\u6210max \u6548\u679c\u4e00\u6837\uff0c\u4f46\u662f\u8fd9\u79cd\u65b9\u6cd5\u53ea\u9002\u5408\u5217\u8f83\u5c11\u7684\u60c5\u51b5\uff0c\u5426\u5219\u51e0\u5341\u5217\u7684\u8bdd\u5c31\u7684\u91cd\u590d\u51e0\u5341\u4e2acase when\u3002<\/p>\n\n\n\n

2\u3001pivot\u51fd\u6570<\/h2>\n\n\n\n

select *
FROM(select sno '\u5b66\u53f7',sname '\u59d3\u540d',course,Score from tb_test) t1
PIVOT(max(score)FOR course IN(\u8bed\u6587,\u6570\u5b66,\u82f1\u8bed )) AS t2<\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n

\u8fd9\u79cd\u65b9\u6cd5\u6bd4\u7b2c1\u79cd\u7a0d\u5fae\u597d\u70b9\uff0c\u4e0d\u7528\u5199\u90a3\u4e48\u591acase when ,\u4f46\u8fd8\u662f\u8981\u628a\u8bfe\u7a0b\u540d\u5168\u90e8\u5217\u4e00\u904d\uff0c\u4e00\u65e6\u589e\u52a0\u4e00\u4e2a\u8bfe\u7a0b\uff0c\u5c31\u9700\u8981\u5bf9sql\u8bed\u53e5\u8fdb\u884c\u6539\u52a8\uff0c\u6709\u6ca1\u6709\u4e00\u52b3\u6c38\u9038\u7684\u65b9\u6cd5\u5462?<\/p>\n\n\n\n

\u6709\uff0c\u90a3\u5c31\u662f\u52a8\u6001\u7684\u6784\u9020in \u540e\u9762\u7684\u5b57\u7b26\u4e32\uff0c\u8bf7\u770b\u65b9\u6cd53\u3002<\/p>\n\n\n\n

3\u3001pivot\u52a8\u6001\u5b9e\u73b0<\/h2>\n\n\n\n

DECLARE @sql_str VARCHAR(8000)
DECLARE @sql_col VARCHAR(8000)
SELECT @sql_col = ISNULL(@sql_col + ',','') + QUOTENAME(course) FROM tb_test GROUP BY course
SET @sql_str = '
SELECT * FROM (
select sno \u5b66\u53f7,sname \u59d3\u540d,course,score from tb_test) as t1 PIVOT
(SUM(score) FOR course IN ( '+ @sql_col +') ) AS t2
ORDER BY t2.\u5b66\u53f7,t2.\u59d3\u540d'
EXEC (@sql_str)<\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n

SELECT @sql_col = ISNULL(@sql_col + ',','') + QUOTENAME(course) FROM tb_test GROUP BY course \u8fd9\u4e32\u4ee3\u7801\u5c31\u662f\u5c06\u8bfe\u7a0b\u540d\u5168\u90e8\u53d6\u51fa\u53bb\u91cd\u540e\u62fc\u63a5\u5728\u4e00\u8d77<\/p>\n\n\n\n

\"\"<\/figure>\n\n\n\n

\u8fd9\u6837\u65e2\u53ef\u52a8\u6001\u5b9e\u73b0sql\u67e5\u8be2\u7684\u884c\u8f6c\u5217\u3002<\/p>\n\n\n\n

SQL\u811a\u672c\u4e0b\u8f7d<\/strong><\/p>\n\n\n\n

\u94fe\u63a5: https:\/\/pan.baidu.com\/s\/1-AaSSDZc02dgY3amAfavUg<\/a> \u63d0\u53d6\u7801: et2a <\/p>\n","protected":false},"excerpt":{"rendered":"

\u5229\u7528case when\u3001pivot\u5b9e\u73b0sql\u67e5\u8be2\u7ed3\u679c\u7684\u884c\u8f6c\u5217\u663e\u793a<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[20],"tags":[24],"yoast_head":"\nsql server\u67e5\u8be2\u7ed3\u679c\u884c\u8f6c\u5217 - \u8bfe\u8bbe\u5e2e<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"http:\/\/www.keshebang.com\/?p=289\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"sql server\u67e5\u8be2\u7ed3\u679c\u884c\u8f6c\u5217 - \u8bfe\u8bbe\u5e2e\" \/>\n<meta property=\"og:description\" content=\"\u5229\u7528case when\u3001pivot\u5b9e\u73b0sql\u67e5\u8be2\u7ed3\u679c\u7684\u884c\u8f6c\u5217\u663e\u793a\" \/>\n<meta property=\"og:url\" content=\"http:\/\/www.keshebang.com\/?p=289\" \/>\n<meta property=\"og:site_name\" content=\"\u8bfe\u8bbe\u5e2e\" \/>\n<meta property=\"article:published_time\" content=\"2024-04-06T09:59:05+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2024-04-17T13:41:09+00:00\" \/>\n<meta property=\"og:image\" content=\"http:\/\/www.keshebang.com\/wp-content\/uploads\/2024\/04\/image-8.png\" \/>\n<meta name=\"author\" content=\"junkui\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"\u4f5c\u8005\" \/>\n\t<meta name=\"twitter:data1\" content=\"junkui\" \/>\n\t<meta name=\"twitter:label2\" content=\"\u9884\u8ba1\u9605\u8bfb\u65f6\u95f4\" \/>\n\t<meta name=\"twitter:data2\" content=\"1 \u5206\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"http:\/\/www.keshebang.com\/?p=289\",\"url\":\"http:\/\/www.keshebang.com\/?p=289\",\"name\":\"sql server\u67e5\u8be2\u7ed3\u679c\u884c\u8f6c\u5217 - 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