【简答题】Mrs. Sanchez: Hi Honey. What are you doing? Mr. Sanchez: I was looking at some computer ads. Mrs. Sanchez: Computer ads? Why? Mr. Sanchez: I wanted to buy one for Hector. He needs it for school. M...
【简答题】下面选项中,可以一次删除多个视图的SQL语句是A. DROP VIEW IF EXISTS view_stu1,view_stu2; B. DROP VIEW view_stu1,view_stu2; C. DROP VIEW view_stu1 view_stu2; D. DROP VIEW view_stu1;view_stu2;