非常非常难查询

Question

我有一张表格如下：

**A----B----C----D----F----E**

1----2----3-----4----5----6

1----2----3-----4----5----6

1----2----3-----4----5----6

---

现在我想查询下表中的表格引导下列A，B列的字段值c，d，列F，E中的值以下列A，B，

---

决赛桌

**A----B**

1----2

1----2

1----2

3----4

3----4

3----4

5----6

5----6

5----6

Answer 1

您想要一个基本的union all查询：

select a, b from table t union all
select c, d from table t union all
select f, e from table t;

Answer 2

试试这个：

SELECT a AS A, b AS B 
FROM tablea 
UNION ALL
SELECT c AS A, d AS B 
FROM tablea 
UNION ALL
SELECT f AS A, e AS B 
FROM tablea;