【单选题】
假设需要删除某个角色test_role,可以使用如下()语句。
A、DELETE ROLE test_role
B、REVOKE ROLE test_role
C、DROP ROLE test_role
D、DELETE test_role
A、DELETE ROLE test_role
B、REVOKE ROLE test_role
C、DROP ROLE test_role
D、DELETE test_role
A、ALTER DATABASE ROLE test_role B、CREATE ROLE test_role C、UPDATE ROLE test_role D、ALTER ROLE test_role