在sql中拆分为多行

我的桌子看起来像-

我想做到这一点-

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请帮助SQL替换表名并重试

insert into yourTableName (CollegeID, DeptID, EmpID, Yr, Mnth, Act, Pred) values (234, 34, 4, 2017, 1, 6131.86, 6131.82)

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请替换表名并重试

insert into yourTableName (CollegeID, DeptID, EmpID, Yr, Mnth, Act, Pred) values (234, 34, 4, 2017, 1, 6131.86, 6131.82)

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如果列名是静态的，您可能会使用UNION SELECT查询，如下所示：

Select CollegeID, DeptID, EmpID, "2017" As Y, "1" As Mnth, [Act201701] As Act, [Pred201701] As Pred from [SomeTable]
UNION
Select CollegeID, DeptID, EmpID, "2017" As Y, "2" As Mnth, [Act201702] As Act, [Pred201702] As Pred from [SomeTable]
UNION
Select CollegeID, DeptID, EmpID, "2017" As Y, "3" As Mnth, [Act201703] As Act, [Pred201703] As Pred from [SomeTable]

---

其中，

SomeTable

是您的表名。

如果列名是静态的，您可能会使用UNION SELECT查询，如下所示：

Select CollegeID, DeptID, EmpID, "2017" As Y, "1" As Mnth, [Act201701] As Act, [Pred201701] As Pred from [SomeTable]
UNION
Select CollegeID, DeptID, EmpID, "2017" As Y, "2" As Mnth, [Act201702] As Act, [Pred201702] As Pred from [SomeTable]
UNION
Select CollegeID, DeptID, EmpID, "2017" As Y, "3" As Mnth, [Act201703] As Act, [Pred201703] As Pred from [SomeTable]

---

其中

SomeTable

是您的表名。

使用

apply

：

select t.collegeid, t.deptid, t.empid, v.yr, v.mnth, v.act, v.pred
from t outer apply
     (values (act201701, pred201701, 2017, 1),
             (act201702, pred201702, 2017, 2),
             (act201703, pred201703, 2017, 3),
     ) v(act, pred, yr, mnth);

---

您也可以使用

unpivot

执行相同的操作。但是，

apply

实现了横向连接，这比仅仅取消激活数据要强大得多。

使用

apply

：

select t.collegeid, t.deptid, t.empid, v.yr, v.mnth, v.act, v.pred
from t outer apply
     (values (act201701, pred201701, 2017, 1),
             (act201702, pred201702, 2017, 2),
             (act201703, pred201703, 2017, 3),
     ) v(act, pred, yr, mnth);

---

您也可以使用

unpivot

执行相同的操作。但是，

apply

实现了横向连接，这比仅仅取消激活数据要强大得多。

列名是静态的还是动态的？在Oracle中，您可以使用UNPIVOT，但我不知道它在SQL Server中是否可用。列名是静态的还是动态的？在Oracle中，您可以使用UNPIVOT，但我不知道它在SQL Server中是否可用。