单项选择题
A．S和SC B．SC和C C．S和C D．S、SC和C
A.Ⅰ和Ⅱ B.Ⅰ和Ⅲ C.Ⅱ和Ⅲ D.Ⅰ、Ⅱ和Ⅲ
A.ALTER TABLE B.ALTER VIEW C.CREATE TABLE D.CREATE VIEW