单项选择题
A.Hardware InfoCenter
B.System Planning Tool
C.Offering Information website
D.Technical Delivery and Assessment Guide
单项选择题 You want to enable automatic PGA memory management in your database. Which setting is required toachieve this?（）
单项选择题 Examine these statements: CREATE ROLE registrar GRANT UPDATE ON dtudent_grades TO registrar; GRANT registrar to user1, user2, user3; What does this set of SQL statements do?（）
单项选择题 Cananitembalanceeverbeallowedtobenegative？（）