tsql - T-SQL 帮助多个透视/反透视

Question

我不确定什么是最好的方法支点或非支点。我在一张表中有以下列。

---

group1 | group2 | group3 | amtA1 | amtA2 | amtB1 | amtB2 | amtC1 | amtC1

---

我需要像这样的产品表

---

group1
X | amtA1  | amtB1  | amtC1
Y | amtA2  | amtB2  | amtC2

group2
X | amtA1  | amtB1  | amtC1
Y | amtA2  | amtB2  | amtC2

group3
X | amtA1  | amtB1  | amtC1
Y | amtA2  | amtB2  | amtC2

---

我尽力而为却想不通。任何帮助将不胜感激。

Answer 1

尝试

SELECT group1 As Group, "X" as ColType, amtA1 as ColA,  amtB1 as ColB, amtC1 as ColC
UNION
SELECT group1, "Y", amtA2,  amtB2, amtC2
UNION 
SELECT group2, "X", amtA1,  amtB1, amtC1
UNION 
SELECT group2, "Y", amtA2,  amtB2, amtC2
UNION 
SELECT group3, "X", amtA1,  amtB1, amtC1
UNION 
SELECT group3, "Y", amtA2,  amtB2, amtC2

您现在可以轻松地根据“组”列进行分组。

尽管我会与您组织中的某个人就表格规范化进行“讨论”。