How to give only Select access to a user in Oracle DB

Hi,

App : 9.1

Tools : 9.1.3.0

DB : Oracle 11G R2

OS- Solaris 10

Here customer is using OBDC connection to connect JDE DB using MS Excel. I want to restrict users to only fetch data from a single table, no update access is given. For that I have used below commands, but yet I can see user can select data from other tables too :

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CREATE USER jyoro IDENTIFIED BY jyoro123;

GRANT SUNUSR TO jyoro; (SUNUSR is the role which I have created to allocate users)

GRANT CREATE SESSION TO jyoro;

GRANT SELECT ON PRODDTA.F0101 TO SUNUSR;

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Kindly Advise,

Thanks,

Jyotirmoy