Need to find records which match or unmatch with isd code

Question

Hi all,
Having two tables
1. cdr
callingno                      calledno
9891567854                 8613548159929
9894562145                 8125642136545
9899546213                 8336547896322
8856521217                 8174456217789
2. ISD rates
code
  81
817
818
819
   82
   84
850
852
853
8536
855
  86
Requirements:
1] Matching records : Find records from cdr which matches isd code from isd rates table
it cound be
select cdr.callingno, cdr.calledno from cdr cdr, isdrates isd where (( substr(cdr.calledno,1,1) =isd.code) or ( substr(cdr.calledno,1,2) =isd.code) or ( substr(cdr.calledno,1,3) =isd.code) or
( substr(cdr.calledno,1,4) =isd.code))
output:
callingno                      calledno
9891567854                 8613548159929
9894562145                 8125642136545
8856521217                 8174456217789
2] Unmatching records:
output required:
callingno                      calledno
9899546213                 8336547896322
Kindly Help.

Answer 1

this?
with cdr(callingno,calledno) as (
select '9891567854','8613548159929' from dual union all
select '9894562145','8125642136545' from dual union all
select '9899546213','8336547896322' from dual union all
select '8856521217','8174456217789' from dual ),
isd(code) as(
select '81' from dual union all
select '817' from dual union all
select '818' from dual union all
select '819' from dual union all
select '82' from dual union all
select '84' from dual union all
select '850' from dual union all
select '852' from dual union all
select '853' from dual union all
select '8536' from dual union all
select '855' from dual union all
select '86' from dual )
select q.callingno,
       q.calledno,
       case when count(decode(m, 'MATCHED', 1)) > 0 then 'MATCHED' else 'UNMATCHED' end
  from (select t.callingno,
               t.calledno,
               case when (substr(t.calledno, 1, 4) like i.code || '%') then 'MATCHED' else 'UNMATCHED' end m
          from cdr t, isd i) q
group by q.callingno, q.calledno
CALLINGNO
CALLEDNO
CASEWHENCOUNT(DECODE(M,'MATCHE
9899546213
8336547896322
UNMATCHED
8856521217
8174456217789
MATCHED
9891567854
8613548159929
MATCHED
9894562145
8125642136545
MATCHED
Ramin Hashimzade