查询哪个角色被赋予了哪个权限; 

 select grantee 

 from dba_sys_privs 

 where privilege='ADMINISTRATER DATABASE TRIGGER' 


 ---------检测用户被赋予了哪些角色-------- 

 select granted_role 

 from dba_role_privs 

 where grantee='TESTUSER' 

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