单项选择题
Which view should a user query to display the columns associated with the constraints on a table owned by the user?（）
A.USER_CONSTRAINTS B.USER_OBJECTS C.ALL_CONSTRAINTS D.USER_CONS_COLUMNS E.USER_COLUMNS
多项选择题 Evaluate the SQL statement DROP TABLE DEPT; Which four statements are true of the SQL statement? （）
单项选择题 Which SQL statement generates the alias Annual Salary for the calculated column SALARY*12?（）
单项选择题 Which clause should you use to exclude group results?（）
