Replace last comma with ' and '

Question

Hi All,
please let me know is there any simple way of replacing last comma in as string with ' and '
eg: 1.  abc,xyz,wuv should be returned abc,xyz and wuv
     2. abc,wuv should be returned abc and wuv
     3. abc,pqr,cuq,wuv should be returned abc ,pqr,cuq and wuv
DB version : 11.2.0.3
Thanks,
DS

Answer 1

With only SUBSTR and INSTR:
<LQS with sample_data as ( select 'abc,xyz,wuv' str  from dual union
  2                        select 'abc,wuv' from dual union
  3                        select 'abc,pqr,cuq,wuv' from dual
  4                      )
  5  --
  6  -- actual query
  7  --
  8  select str
  9  ,      substr(str, 1, instr(str, ',', -1)-1)||' and '||substr(str, instr(str, ',', -1)+1)
10  from   sample_data;
STR             SUBSTR(STR,1,INSTR(STR,',',-1)-1)||
abc,pqr,cuq,wuv abc,pqr,cuq and wuv
abc,wuv         abc and wuv
abc,xyz,wuv     abc,xyz and wuv
3 rows selected.