Write a query to insert space between each char

Expected Output: 

 

 

with d as (select ename c FROM emp where deptno=20)

select listagg(substr(c,l,1),' ') within group(order by l) result from d,

lateral(select level l from dual connect by level <=length(c))

group by c;

 

select regexp_replace(ename ,'(.)','\1 ')  col FROM emp where deptno=20;

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