如何将两列结果合并到带有分隔符的一列中

Question

我有一个查询，比如

select a.host_coll_code AS "Code", a.description AS "DESCRIPTION" 
from coll_collateral a 

当此查询运行时，我得到的结果如下

   Code          DESCRIPTION
  ---------------------------
   123              ABC
   589              UYR
   ...              ...

我想在一列中得到结果，带有分隔符，例如

Code and Description
---------------------
      123-ABC
      589-UYR
      ....

我该怎么做？

谢谢

Answer 1

通过使用concat函数或串联运算符||：

SQL> with t1(Code, DESCRIPTION) as(
  2    select 123, 'ABC' from dual union all
  3    select 589, 'UYR' from dual
  4  )
  5  select concat(concat(to_char(code), '-'), DESCRIPTION) result
  6    from t1
  7  ;
RESULT
-----------
123-ABC
589-UYR

或

select to_char(code) || '-' || Description result
  from t1
 RESULT
-----------
123-ABC
589-UYR

Answer 2

select a.host_coll_code || '-' || a.description AS "Code and Description" 
from coll_collateral a 

Answer 3

select CAST(a.host_coll_code AS VARCHAR(100))
       ||'-'||
       a.description AS "CODE_AND_DESCRIPTION" 
from coll_collateral a