Thank you so much for your reply , but i have requirement as below.
The structure of the file is
feild1,filed2,filed3,filed4.
so, I created a OTD with comma delimted on each filed.But I have input data as below :
100,aaa,bbb,ccc
200,aaa,bbb,"ccc,ddd"
300,"aaa,xxx",bbb,"ccc,ddd".
Data within the quotes is causing problems for me.