Question

我有像这样的数据

  TagNo  FromBay   FromPanel ToBay  ToPanel  FromDevice  FromTerminal FromRef
   1000    +A        =D       +E       +F      +X1          1             D1
   1001    +A        =D       +E       +F      +X1          1             D2
   1001    +A        =D       +E       +F      +X1          2             D3
   1002    +A        =D       +E       +F      +X1          2             D4
   1000    +A        =D       +E       +F      +X5          2             D5

我想要这个

  TagNo        FromBay   FromPanel ToBay  ToPanel  FromDevice  FromTerminal   FromRef
   1000,1001    +A        =D       +E       +F      +X1          1            D1,D2
   1001,1002    +A        =D       +E       +F      +X1          2            D3,D4

这意味着如果FromBay FromPanel ToBay ToPanel FromDevice具有相同的值，则返回这些reocrds的连接TagNo和FromRef

我怎么能在TSQL中做到这一点

Answer 1

您应该能够使用 XML PATH 获取输出，在SQLFiddle中创建了一个示例，没有使用您需要的所有列，但是你应该能够通过样本得到你想要的东西：

SELECT FromBay,FromTerminal, 
FromRef = STUFF((SELECT ',' + FromRef FROM GroupTbl i
                          WHERE
                          i.FromBay = o.FromBay AND
                          i.FromTerminal = o.FromTerminal
                            FOR XML PATH('')),1,1,''),
TagNo = STUFF((SELECT ',' + TagNo FROM GroupTbl i
                          WHERE
                          i.FromBay = o.FromBay AND
                          i.FromTerminal = o.FromTerminal
                            FOR XML PATH('')),1,1,'')
FROM GroupTbl o
GROUP BY FromBay,FromTerminal

Answer 2

如果连接仅用于行对，则可以执行此操作：

select t1.TagNo + ',' + t2.TagNo as TagNo,
t1.FromBay,t1.FromPanel,t1.ToBay,t1.ToPanel,t1.FromDevice,t1.FromTerminal,
t1.FromRef + ',' + t2.FromRef
from t t1
inner join t t2
on (t1.FromBay=t2.FromBay and t1.FromPanel=t2.FromPanel 
and t1.ToBay=t2.ToBay and t1.ToPanel=t2.ToPanel 
and t1.FromDevice=t2.FromDevice and t1.FromTerminal=t2.FromTerminal
and t1.TagNo<t2.TagNo)

根据SQL中的某些条件加入Fields

2 个答案: