如何在一列用分隔符组合两个列结果

Question

我有一个像

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

当此查询运行我得到的结果是这样的

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

我想要得到的结果查询在一列中带有分隔符

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

我该怎么办？

感谢

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 

OR

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