Choose three
Which three are true about granting object privileges on tables, views, and sequences?
A) UPDATE can be granted only on tables and views.
B) DELETE can be granted on tables, views, and sequences.
C) REFERENCES can be granted only on tables and views.
D) INSERT can be granted on tables, vews, and sequences.
E) SELECT can be granted only on tables and views.
F) ALTER can be granted only on tables and sequences.
Answer：ACF
(解析：update 和 delete 只能在表和视图上授权，不能在 sequence 上。
只有 SELECT 和 ALTER 权限对序列有效;
)