● 设有职工表emp(Eno,Ename,Sex,Age)(Eno为职工号,Ename为职工姓名,Sex为性别,Age为年龄)和salary(Eno,Hour,Month,Wage)(Hour为工作时长为多少小时,Month表示几月份,Wage为薪水),建立一个视图V-Salary(Eno,Ename,Hour,Month,Wage),并按Eno升序排序的SQL语句为: (1)CREATE ( ) AS SELECT emp.Eno,emp.Ename ,salary.Hour,salary.Month,salary.Wage FROM emp, salary WHERE emp.Eno=salary.Eno ORDER BY ENO 在此视图上月工资在3000以上的职工工资情况的SQL语句为: SELECT Eno,Ename,AVG(Wage) FROM V-Salary GROUP BY ( ) HAVING AVG(Wage)>3000 ( ) A. CREATE TABLE V-Salary(emp.Eno,emp.Ename,salary.Hour,salary.Month,salary.Wage) B. CREATE VIEW V-Salary(Eno,Ename,Hour,Month,Wage) C. CREATE TABLE V-Salary(Eno,Ename,Hour,Month,Wage) D. CREATE INDEX V-Salary(Eno,Ename,Hour,Month,Wage) ( ) A. Eno B.Ename C.Month D.Wage