Compare Comma Separated (Delimited) values in SQL Query

Hi,

I have a scenario where user provided a comma separated string like 'amit,sanjay,sumit' and I want to match where each comma separated value is subset of another data in table.

For e.g.

Table 1

Sl.No        ColumnName

1.            sumit,sanjay,amit,ajay

2.            amit,sumit,sanjay

3.            amit,sumit,akshay

I want a query which would return Sl.No 1 and 2 as 'amit,sanjay,sumit' is exists in those two rows and not on the third row.