blocks|key|3293175|text|使用case语句|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|3293176|select+studentname,
max(case+when+subjectname='A'+then+mark+else+0+end)+'A',
max(case+when+subjectname='B'+then+mark+else+0+end)+'B',
max(case+when+subjectname='C'+then+mark+else+0+end)+'C'
from+table1
group+by+studentname|code-block|syntax|javascript|3293177|fiddle|3293178|entityMap|0|LINK|mutability|MUTABLE|url|http://sqlfiddle.com/#!6/a6330/3^0|2|4|0|0|0|6|0|0^^$0|@$1|2|3|4|5|6|7|U|8|@$9|V|A|W|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|X|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|Y|8|@]|D|@$9|Z|A|10|1|11]]|E|$]]|$1|M|3|-4|5|6|7|12|8|@]|D|@]|E|$]]]|N|$O|$5|P|Q|R|E|$S|T]]]]

Use <code>case</code> statement

<pre><code>select studentname,
max(case when subjectname='A' then mark else 0 end) 'A',
max(case when subjectname='B' then mark else 0 end) 'B',
max(case when subjectname='C' then mark else 0 end) 'C'
from table1
group by studentname
</code></pre>

<a href="http://sqlfiddle.com/#!6/a6330/3" rel="nofollow">fiddle</a>

blocks|key|6098709|text|你需要使用枢轴，|type|unstyled|depth|inlineStyleRanges|entityRanges|data|6098710|FROM+(
SELECT+CUST,+PRODUCT,+QTY
FROM+Product)+up
PIVOT+(SUM(QTY)+FOR+CUST+IN+(FRED,+KATE))+AS+pvt
ORDER+BY+PRODUCT
GO|code-block|syntax|javascript|6098711|请参见示例：SQL+Pivot|offset|length|6098712|entityMap|0|LINK|mutability|MUTABLE|url|http://blog.sqlauthority.com/2008/06/07/sql-server-pivot-and-unpivot-table-examples/^0|0|0|6|9|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|T|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|U|8|@]|9|@$I|V|J|W|1|X]]|A|$]]|$1|K|3|-4|5|6|7|Y|8|@]|9|@]|A|$]]]|L|$M|$5|N|O|P|A|$Q|R]]]]

You need to use a pivot,

<pre><code>FROM (
SELECT CUST, PRODUCT, QTY
FROM Product) up
PIVOT (SUM(QTY) FOR CUST IN (FRED, KATE)) AS pvt
ORDER BY PRODUCT
GO
</code></pre>

See example : <a href="http://blog.sqlauthority.com/2008/06/07/sql-server-pivot-and-unpivot-table-examples/" rel="nofollow">SQL Pivot</a>

blocks|key|1881686|text|我已经使用了pivot+SQL，我的问题已经解决了。下面是我的问题|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1881687|SELECT+StudentName,+A,+B,+ISNULL(C,0)+as+C
FROM+(select+StudentName,+subjectName,+Mark+from+dbo.Student)+as+src
Pivot(max(mark)+for+subjectName+in(A,+B,+C))++as+pvt|code-block|syntax|javascript|1881688|下面是有关pivot+http://blog.sqlauthority.com/2008/06/07/sql-server-pivot-and-unpivot-table-examples/的更多示例|offset|length|1881689|Fiddle|1881690|entityMap|0|LINK|mutability|MUTABLE|url|http://blog.sqlauthority.com/2008/06/07/sql-server-pivot-and-unpivot-table-examples/|1|http://sqlfiddle.com/#!3/01e1c/2^0|0|0|B|2C|0|0|0|6|1|0^^$0|@$1|2|3|4|5|6|7|W|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|X|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|Y|8|@]|9|@$I|Z|J|10|1|11]]|A|$]]|$1|K|3|L|5|6|7|12|8|@]|9|@$I|13|J|14|1|15]]|A|$]]|$1|M|3|-4|5|6|7|16|8|@]|9|@]|A|$]]]|N|$O|$5|P|Q|R|A|$S|T]]|U|$5|P|Q|R|A|$S|V]]]]

I've used pivot SQL and my problem was solved. 
Below is my query 

<pre><code>SELECT StudentName, A, B, ISNULL(C,0) as C
FROM (select StudentName, subjectName, Mark from dbo.Student) as src
Pivot(max(mark) for subjectName in(A, B, C)) as pvt
</code></pre>

and also below is more example about pivot
<a href="http://blog.sqlauthority.com/2008/06/07/sql-server-pivot-and-unpivot-table-examples/" rel="nofollow">http://blog.sqlauthority.com/2008/06/07/sql-server-pivot-and-unpivot-table-examples/</a>

<a href="http://sqlfiddle.com/#!3/01e1c/2" rel="nofollow">Fiddle</a>

I've got report table as below : Report(StudentName, SubJectName, Mark) and example data below 

<pre><code>StudentName | SubjectName | Mark
Tommy A 6
Tommy B 8
Tommy C 10
Susan A 7
Susan B 10
</code></pre>

So I'd like to query and display As below:

<pre><code>SubjectName | A | B | C
Tommy 6 8 10
Susan 7 10 0
</code></pre>

Could you suggest me how to do this?. I researched using pivot but I don't know how to apply? 

Thanks in advance!

Need help sql query for report?

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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我有如下的报告表: Report(StudentName，SubJectName，Mark)和下面的示例数据StudentName    |    SubjectName   |  MarkTommy               A                6Tommy               B      ...

问需要报表的sql查询帮助？
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问需要报表的sql查询帮助？EN