A．Less than one year.
B．More than one year.
C．Less than one term.
D．More than one term.

（32）下列 SQL 的数据定义语句组中，（ ）包含了不正确的数据定义语句。 Ⅰ．CREATE TABLE? CREATE VIEW? CREATE INDEX? Ⅱ．DROP TABLE? DROP VIEW? DROP INDEX? Ⅲ．ALTER TABLE? ALTER VIEW? ALTER INDEX? A）仅Ⅰ B）仅Ⅱ C）仅Ⅲ D）都包含 点击查看答案

A．Learn from her since she took the class.B．Concentrate on the section on prostaglandin.C．Study the exam papers.D．Work harder.

A.Learn
B.
B．Concentrate
C.
C．Study
D.
D．Work
E.

点击查看答案