Hi Kiran,
you will see for each authorization object field value combination (ACTVT and TABLE combination for S_TABU_NAM) there is separate Authorization in AGR_1251 table.
now to find out roles with only display access to particulate table -
To get list of role with Maintain access to Tables do this :
1) SE16 >> AGR_1251 put roles and S_TABU_NAM in the authorization object field
2) Put TABLE in filed called "Field name"
3) Put all table names into field called "Value"
4) exclude single value "X" in field called "ID whether object is deleted"
5) Execute
5) Copy column "Authorization Name" - put then into one notepad we need this data in next steps
6) Go back to SE16 >> AGR_1251 put roles and S_TABU_NAM in the authorization object field
7) Put ACTVT in filed called "Field name"
8) Put 02 into field called "Value"
9) Put Copied "Authorization Name" data into field called "Authorization"
10) Execute
this will give roles having maintain access to Tables .
Regards,
Satyajit