行转列，将表中某字段所有值横向显示

表字段如下

SQL> select ename from scott.emp;
ENAME
----------
SMITH
ALLEN
WARD
JONES
MARTIN
BLAKE
CLARK
SCOTT
KING
TURNER
ADAMS
JAMES
FORD
MILLER
14 rows selected.

 

横向显示

SELECT ltrim(MAX(sys_connect_by_path(ename, ',')),',') AS path
  FROM (SELECT ename, rownum AS rn FROM scott.emp)
 START WITH rn = 1
CONNECT BY rn = rownum

------------------------------------------------------------------------------------
SMITH,ALLEN,WARD,JONES,MARTIN,BLAKE,CLARK,SCOTT,KING,TURNER,ADAMS,JAMES,FORD,MILLER

或者

select listagg(ename,',') within group(order by ename) ename from (
select 1 as id , ename from scott.emp
)
group by id  
 
ENAME

-----------------------------------------------------------------------------------------
ADAMS,ALLEN,BLAKE,CLARK,FORD,JAMES,JONES,KING,MARTIN,MILLER,SCOTT,SMITH,TURNER,WARD