Question

I need to write a sql for a prompt in a reporting tool. I get the list of multiple values in a variable separated by ‘-‘ and the number of such values can vary.(eg1.”abc-def” eg2.”abc-def-xyz”).

Now I need to write sql in oracle of this form(logically)

select something
  from somewhere
 where someColumn in 'abc' -- use substr to extract abc
    or someColumn in 'def' -- use substr to extract def
    or ...till we don't find '-'.

I can’t use plsql for the query. Either I may not be knowing to use the variable in which I select into in plsql or may be the reporting tool doesn’t support that.

Thanks in advance.

Answer 1

Try

select something
  from somewhere
 where someColumn in (select regexp_substr('abc-def-xyz','[^-]+', 1, level) from dual
                     connect by regexp_substr('abc-def-xyz', '[^-]+', 1, level) is not null);

To generalize (considering your fields are separated by “-“)

select something
  from somewhere
 where someColumn in (select regexp_substr(variable,'[^-]+', 1, level) from dual
                     connect by regexp_substr(variable, '[^-]+', 1, level) is not null);

Basically the output of the subquery is shown below –

  SQL> select regexp_substr('abc-def-xyz','[^-]+', 1, level) value from dual
      connect by regexp_substr('abc-def-xyz', '[^-]+', 1, level) is not null;

VALUE                            
-------------------------------- 
abc                              
def                              
xyz