相关疑难解决方法(0)

是否可以构造SQL来连接多行的列值？

以下是一个例子:

表A.

PID
A
B
C

表B.

PID   SEQ    Desc

A     1      Have
A     2      a nice
A     3      day.
B     1      Nice Work.
C     1      Yes
C     2      we can 
C     3      do 
C     4      this work!

SQL的输出应该是 -

PID   Desc
A     Have a nice day.
B     Nice Work.
C     Yes we can do this work!

所以输出表的Desc列基本上是表B的SEQ值的串联？

有没有SQL的帮助？

考虑表STUDENTS:

---------------------
|Sr.No|    Name     |
---------------------  
| 1   |    Jon      |
---------------------
| 2   |    Rob      |
---------------------
| 3   |    Bran     |
---------------------

使用以下查询我们得到:

select listagg(Name, ',') within group (order by Name) from STUDENTS

从这里我们将得到:

Jon,Rob,Bran

我们如何得到类似的东西

"Jon","Rob","Bran"