Comma Separated values with oracle Query

Question

i have table

id product     sharedwith  createdby   proddesc
1 100           78          71          ABC
2 200           73,45,46    71          LMN
3 300           45,46       78          IJK

i wont to display all product which created by 78 and also shared with 78

Answer 1

where createdby = 78 or instr(','||sharedwith||',', ',78,') > 0