Question

我有两个mssql表，其数据如下：

table_fruit

id   valueid  valuetext
111  1        apple
111  2        pear
111  3        orange
112  1        kiwi
112  2        pear
112  3        banana

table_people

id  name
111 bob
112 george

我希望使用上面两个表在这样的单行上得到最终结果：

name    fruit1  fruit2  fruit3
bob     apple   pear    orange
george  kiwi    pear    banana

我已尝试加入在id上链接的表格，但最终在结果网格中每个ID有三行？

感谢您寻找

Answer 1

解决方案1（未测试）

SELECT name, [0] fruit1, [1] fruit2, [2] fruit3
FROM
(
    SELECT f0.id, f0.name, f1.valuetext, f1.valueid  
    from table_people f0 left outer join table_fruit f1 on f0.id=f1.id
) AS SourceTable
PIVOT
(
MAX(valuetext) FOR valueid IN ([0], [1], [2])
) AS PivotTable;

Answer 2

解决方案3：

select f0.name, 
f1.valuetext fruit1, f2.valuetext fruit2, f3.valuetext fruit3 
from table_people f0
left outer join table_fruit f1 on f0.id=f1.id and f1.valueid=1 
left outer join table_fruit f2 on f0.id=f2.id and f2.valueid=2 
left outer join table_fruit f3 on f0.id=f3.id and f3.valueid=3

Answer 3

解决方案2：

select f0.name,
Max(case when f1.valueid=1 then f1.valuetext else cast(null as varchar(1)) end) fruit1, 
Max(case when f1.valueid=2 then f1.valuetext else cast(null as varchar(1)) end) fruit2, 
Max(case when f1.valueid=3 then f1.valuetext else cast(null as varchar(1)) end) fruit3 
from table_people f0
left outer join table_fruit f1 on f0.id=f1.id
group by f0.id, f0.name

Answer 4

是的，MSSQL也支持PIVOT子句。您可以参考这篇文章：https://technet.microsoft.com/en-us/library/ms177410(v=sql.105).aspx

可以使用excel中的数据库连接表，例如数据透视表吗？

4 个答案: