Don't show slash if column is null
I have statement like this
select 'xx' || ' / ' || 'yy' || ' / ' || 'zz' as com from dual ;
the output obviously is
xx / yy / zz
the problem is if XX is null , then the output is
/ yy / zz
if zz too is null , the the output is / yy /
How not to show the slash / in these situations ?
Best Regards